diff --git a/package-lock.json b/package-lock.json
index 43b49fb..b133ff8 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -10,6 +10,7 @@
       "license": "MIT",
       "dependencies": {
         "@priduck-color-theme/cli": "^0.0.1",
+        "colorjs.io": "^0.5.0",
         "yargs": "^17.7.2"
       },
       "devDependencies": {
@@ -79,6 +80,11 @@
       "resolved": "https://registry.npmjs.org/color-name/-/color-name-1.1.4.tgz",
       "integrity": "sha512-dOy+3AuW3a2wNbZHIuMZpTcgjGuLU/uBL/ubcZF9OXbDo8ff4O8yVp5Bf0efS8uEoYo5q4Fx7dY9OgQGXgAsQA=="
     },
+    "node_modules/colorjs.io": {
+      "version": "0.5.0",
+      "resolved": "https://registry.npmjs.org/colorjs.io/-/colorjs.io-0.5.0.tgz",
+      "integrity": "sha512-qekjTiBLM3F/sXKks/ih5aWaHIGu+Ftel0yKEvmpbKvmxpNOhojKgha5uiWEUOqEpRjC1Tq3nJRT7WgdBOxIGg=="
+    },
     "node_modules/emoji-regex": {
       "version": "8.0.0",
       "resolved": "https://registry.npmjs.org/emoji-regex/-/emoji-regex-8.0.0.tgz",
diff --git a/package.json b/package.json
index 6fa9ef3..cde3d22 100644
--- a/package.json
+++ b/package.json
@@ -17,6 +17,7 @@
   },
   "dependencies": {
     "@priduck-color-theme/cli": "^0.0.1",
+    "colorjs.io": "^0.5.0",
     "yargs": "^17.7.2"
   }
 }
diff --git a/src/cli.mjs b/src/cli.mjs
index f08b089..fb4dda8 100644
--- a/src/cli.mjs
+++ b/src/cli.mjs
@@ -1,12 +1,14 @@
 import yargs from "yargs";
 import { hideBin } from "yargs/helpers";
 import * as cssCmd from "./cmds/css.mjs";
+import * as paletteCmd from "./cmds/palette.mjs";
 
 // Set up the top-level command.
 yargs(hideBin(process.argv))
   .scriptName("priduck")
   .usage("$0 <cmd> [args]")
   .command(cssCmd)
+  .command(paletteCmd)
   .demand(2)
   .help()
   .parse();
diff --git a/src/cmds/css/variables.mjs b/src/cmds/css/variables.mjs
index 8a30496..5c9a42d 100644
--- a/src/cmds/css/variables.mjs
+++ b/src/cmds/css/variables.mjs
@@ -1,25 +1,18 @@
 import { mkdirp } from "mkdirp";
-import { fileURLToPath } from "url";
 import path from "path";
 import fs from "node:fs/promises";
+import * as colors from "../../colors.mjs";
 
 export const command = "variables [path.css]";
 export const desc = "Generate a CSS file that uses variables to generate";
 
 export function builder(argv) {
-  argv
-    .option("c", {
-      alias: "hue",
-      default: 220,
-      describe: "The hue (0-360) for the base color",
-      type: "number",
-    })
-    .option("o", {
-      alias: "output",
-      demandOption: true,
-      describe: "The output path for colors.css",
-      type: "string",
-    });
+  argv.option("o", {
+    alias: "output",
+    demandOption: true,
+    describe: "The output path for colors.css",
+    type: "string",
+  });
 }
 
 export async function handler(argv) {
@@ -36,19 +29,19 @@ export async function handler(argv) {
 
   // We have ten colors, with 0 being the base hue and the others being evenly
   // rotated around the color wheel.
-  for (let color = 0; color < 10; color++) {
+  for (const color of colors.colorList) {
     // Figure out the rotation.
-    const rotation = color * 36; // 1/10th of a circle
+    const rotation = colors.getHue(color);
 
     // For each hue, we have ten levels of brightness ranging from very dark
     // to very light.
-    for (let brightness = 0; brightness < 10; brightness++) {
+    for (const brightness of colors.brightnessList) {
       // We use a standard code (--color-cXbY) for our codes.
       const code = `--color-priduck-c${color}b${brightness}`;
 
       // Figure out the ramps we are using for brighteness.
-      const l = brightness * 11;
-      const s = 50 - brightness * 5;
+      const l = colors.getLightness(brightness);
+      const s = colors.getChroma(brightness);
 
       // Write out the CSS.
       lines.push(
diff --git a/src/cmds/palette.mjs b/src/cmds/palette.mjs
new file mode 100644
index 0000000..1422f07
--- /dev/null
+++ b/src/cmds/palette.mjs
@@ -0,0 +1,79 @@
+import { mkdirp } from "mkdirp";
+import path from "path";
+import fs from "node:fs/promises";
+import * as colors from "../colors.mjs";
+
+export const command = "palette [path.gpl]";
+export const desc = "Generate a GNU Imp/Inkscape palette";
+
+export function builder(argv) {
+  argv
+    .option("c", {
+      alias: "hue",
+      default: 220,
+      describe: "The hue (0-360) for the base color",
+      type: "number",
+    })
+    .option("s", {
+      alias: "secondary",
+      default: 5,
+      choices: colors.colorList,
+      describe: "The color code (0-9) based on the hue",
+      type: "number",
+    })
+    .option("t", {
+      alias: "tertiary",
+      default: 8,
+      choices: colors.colorList,
+      describe: "The color code (0-9) based on the hue",
+      type: "number",
+    })
+    .option("n", {
+      alias: "name",
+      default: "Priduck",
+      describe: "The name of the palette",
+      type: "string",
+    })
+    .option("o", {
+      alias: "output",
+      demandOption: true,
+      describe: "The output path for colors.css",
+      type: "string",
+    });
+}
+
+export async function handler(argv) {
+  // Figure out where we need to write the files.
+  const file = argv.output;
+  const dir = path.dirname(file);
+
+  console.log("base hue", argv.hue);
+  console.log("writing", file);
+
+  await mkdirp(dir);
+
+  // Start with the header.
+  let lines = ["GIMP Palette", `Name: ${argv.name}`, "Columns: 30", ""];
+
+  // Loop through the three primary colors, then the brightness for each one.
+  const colorList = [0, argv.secondary, argv.tertiary];
+
+  for (const colorIndex in colorList) {
+    const color = colorList[colorIndex];
+    const colorName =
+      colorIndex == 0 ? "primary" : colorIndex == 1 ? "secondary" : "tertiary";
+
+    for (const brightness of colors.brightnessList) {
+      const lch = colors.getLchCss(argv.hue, color, brightness);
+      const rgb = colors.getRgbArray(argv.hue, color, brightness);
+      const line = `${rgb[0]} ${rgb[1]} ${rgb[2]} ${colorName}-${brightness} # ${lch}`;
+
+      lines.push(line);
+    }
+  }
+
+  // Write out the files.
+  await fs.writeFile(file, Buffer.from(lines.join("\n")));
+
+  console.log("wrote", file);
+}
diff --git a/src/colors.css b/src/colors.css
deleted file mode 100644
index f053e54..0000000
--- a/src/colors.css
+++ /dev/null
@@ -1,102 +0,0 @@
-:root {
-  --color-c0b0: lch(0 50 calc(var(--color-hue) + 0));
-  --color-c0b1: lch(11 45 calc(var(--color-hue) + 0));
-  --color-c0b2: lch(22 40 calc(var(--color-hue) + 0));
-  --color-c0b3: lch(33 35 calc(var(--color-hue) + 0));
-  --color-c0b4: lch(44 30 calc(var(--color-hue) + 0));
-  --color-c0b5: lch(55 25 calc(var(--color-hue) + 0));
-  --color-c0b6: lch(66 20 calc(var(--color-hue) + 0));
-  --color-c0b7: lch(77 15 calc(var(--color-hue) + 0));
-  --color-c0b8: lch(88 10 calc(var(--color-hue) + 0));
-  --color-c0b9: lch(99 5 calc(var(--color-hue) + 0));
-  --color-c1b0: lch(0 50 calc(var(--color-hue) + 36));
-  --color-c1b1: lch(11 45 calc(var(--color-hue) + 36));
-  --color-c1b2: lch(22 40 calc(var(--color-hue) + 36));
-  --color-c1b3: lch(33 35 calc(var(--color-hue) + 36));
-  --color-c1b4: lch(44 30 calc(var(--color-hue) + 36));
-  --color-c1b5: lch(55 25 calc(var(--color-hue) + 36));
-  --color-c1b6: lch(66 20 calc(var(--color-hue) + 36));
-  --color-c1b7: lch(77 15 calc(var(--color-hue) + 36));
-  --color-c1b8: lch(88 10 calc(var(--color-hue) + 36));
-  --color-c1b9: lch(99 5 calc(var(--color-hue) + 36));
-  --color-c2b0: lch(0 50 calc(var(--color-hue) + 72));
-  --color-c2b1: lch(11 45 calc(var(--color-hue) + 72));
-  --color-c2b2: lch(22 40 calc(var(--color-hue) + 72));
-  --color-c2b3: lch(33 35 calc(var(--color-hue) + 72));
-  --color-c2b4: lch(44 30 calc(var(--color-hue) + 72));
-  --color-c2b5: lch(55 25 calc(var(--color-hue) + 72));
-  --color-c2b6: lch(66 20 calc(var(--color-hue) + 72));
-  --color-c2b7: lch(77 15 calc(var(--color-hue) + 72));
-  --color-c2b8: lch(88 10 calc(var(--color-hue) + 72));
-  --color-c2b9: lch(99 5 calc(var(--color-hue) + 72));
-  --color-c3b0: lch(0 50 calc(var(--color-hue) + 108));
-  --color-c3b1: lch(11 45 calc(var(--color-hue) + 108));
-  --color-c3b2: lch(22 40 calc(var(--color-hue) + 108));
-  --color-c3b3: lch(33 35 calc(var(--color-hue) + 108));
-  --color-c3b4: lch(44 30 calc(var(--color-hue) + 108));
-  --color-c3b5: lch(55 25 calc(var(--color-hue) + 108));
-  --color-c3b6: lch(66 20 calc(var(--color-hue) + 108));
-  --color-c3b7: lch(77 15 calc(var(--color-hue) + 108));
-  --color-c3b8: lch(88 10 calc(var(--color-hue) + 108));
-  --color-c3b9: lch(99 5 calc(var(--color-hue) + 108));
-  --color-c4b0: lch(0 50 calc(var(--color-hue) + 144));
-  --color-c4b1: lch(11 45 calc(var(--color-hue) + 144));
-  --color-c4b2: lch(22 40 calc(var(--color-hue) + 144));
-  --color-c4b3: lch(33 35 calc(var(--color-hue) + 144));
-  --color-c4b4: lch(44 30 calc(var(--color-hue) + 144));
-  --color-c4b5: lch(55 25 calc(var(--color-hue) + 144));
-  --color-c4b6: lch(66 20 calc(var(--color-hue) + 144));
-  --color-c4b7: lch(77 15 calc(var(--color-hue) + 144));
-  --color-c4b8: lch(88 10 calc(var(--color-hue) + 144));
-  --color-c4b9: lch(99 5 calc(var(--color-hue) + 144));
-  --color-c5b0: lch(0 50 calc(var(--color-hue) + 180));
-  --color-c5b1: lch(11 45 calc(var(--color-hue) + 180));
-  --color-c5b2: lch(22 40 calc(var(--color-hue) + 180));
-  --color-c5b3: lch(33 35 calc(var(--color-hue) + 180));
-  --color-c5b4: lch(44 30 calc(var(--color-hue) + 180));
-  --color-c5b5: lch(55 25 calc(var(--color-hue) + 180));
-  --color-c5b6: lch(66 20 calc(var(--color-hue) + 180));
-  --color-c5b7: lch(77 15 calc(var(--color-hue) + 180));
-  --color-c5b8: lch(88 10 calc(var(--color-hue) + 180));
-  --color-c5b9: lch(99 5 calc(var(--color-hue) + 180));
-  --color-c6b0: lch(0 50 calc(var(--color-hue) + 216));
-  --color-c6b1: lch(11 45 calc(var(--color-hue) + 216));
-  --color-c6b2: lch(22 40 calc(var(--color-hue) + 216));
-  --color-c6b3: lch(33 35 calc(var(--color-hue) + 216));
-  --color-c6b4: lch(44 30 calc(var(--color-hue) + 216));
-  --color-c6b5: lch(55 25 calc(var(--color-hue) + 216));
-  --color-c6b6: lch(66 20 calc(var(--color-hue) + 216));
-  --color-c6b7: lch(77 15 calc(var(--color-hue) + 216));
-  --color-c6b8: lch(88 10 calc(var(--color-hue) + 216));
-  --color-c6b9: lch(99 5 calc(var(--color-hue) + 216));
-  --color-c7b0: lch(0 50 calc(var(--color-hue) + 252));
-  --color-c7b1: lch(11 45 calc(var(--color-hue) + 252));
-  --color-c7b2: lch(22 40 calc(var(--color-hue) + 252));
-  --color-c7b3: lch(33 35 calc(var(--color-hue) + 252));
-  --color-c7b4: lch(44 30 calc(var(--color-hue) + 252));
-  --color-c7b5: lch(55 25 calc(var(--color-hue) + 252));
-  --color-c7b6: lch(66 20 calc(var(--color-hue) + 252));
-  --color-c7b7: lch(77 15 calc(var(--color-hue) + 252));
-  --color-c7b8: lch(88 10 calc(var(--color-hue) + 252));
-  --color-c7b9: lch(99 5 calc(var(--color-hue) + 252));
-  --color-c8b0: lch(0 50 calc(var(--color-hue) + 288));
-  --color-c8b1: lch(11 45 calc(var(--color-hue) + 288));
-  --color-c8b2: lch(22 40 calc(var(--color-hue) + 288));
-  --color-c8b3: lch(33 35 calc(var(--color-hue) + 288));
-  --color-c8b4: lch(44 30 calc(var(--color-hue) + 288));
-  --color-c8b5: lch(55 25 calc(var(--color-hue) + 288));
-  --color-c8b6: lch(66 20 calc(var(--color-hue) + 288));
-  --color-c8b7: lch(77 15 calc(var(--color-hue) + 288));
-  --color-c8b8: lch(88 10 calc(var(--color-hue) + 288));
-  --color-c8b9: lch(99 5 calc(var(--color-hue) + 288));
-  --color-c9b0: lch(0 50 calc(var(--color-hue) + 324));
-  --color-c9b1: lch(11 45 calc(var(--color-hue) + 324));
-  --color-c9b2: lch(22 40 calc(var(--color-hue) + 324));
-  --color-c9b3: lch(33 35 calc(var(--color-hue) + 324));
-  --color-c9b4: lch(44 30 calc(var(--color-hue) + 324));
-  --color-c9b5: lch(55 25 calc(var(--color-hue) + 324));
-  --color-c9b6: lch(66 20 calc(var(--color-hue) + 324));
-  --color-c9b7: lch(77 15 calc(var(--color-hue) + 324));
-  --color-c9b8: lch(88 10 calc(var(--color-hue) + 324));
-  --color-c9b9: lch(99 5 calc(var(--color-hue) + 324));
-}
diff --git a/src/colors.mjs b/src/colors.mjs
new file mode 100644
index 0000000..7975039
--- /dev/null
+++ b/src/colors.mjs
@@ -0,0 +1,93 @@
+import Color from "colorjs.io";
+
+/**
+ * Contains the color codes with zero (0) being the base hue.
+ *
+ * @type {number[]}
+ */
+export const colorList = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9];
+
+/**
+ * Contains the standard brightness codes with zero (0) being the darkest and
+ * nine (9) being the lightest.
+ *
+ * @type {number[]}
+ */
+export const brightnessList = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9];
+
+/**
+ * Gets the degree rotation for the given color code.
+ *
+ * @param {number} base The base hue, in the range [0-360)
+ * @param {number} color The color code, in the range of [0-9]
+ */
+export function getHue(base, color) {
+  return (base + color * 36) % 360;
+}
+
+/**
+ * Gets the lighteness for a given brightness.
+ *
+ * @param {number} brightness The brightenss, in the range of [0-9]
+ */
+export function getLightness(brightness) {
+  return 5 + brightness * 10;
+}
+
+/**
+ * Gets the saturation for a given brightness.
+ *
+ * @param {number} brightness The brightenss, in the range of [0-9]
+ */
+export function getChroma(brightness) {
+  return 50 - brightness * 5;
+}
+
+/**
+ * Get the LCH string
+ *
+ * @param {number} base The base hue, in the range [0-360)
+ * @param {number} color The color code, in the range of [0-9]
+ * @param {number} brightness The brightenss, in the range of [0-9]
+ */
+export function getLchCss(base, color, brightness) {
+  const l = getLightness(brightness);
+  const c = getChroma(brightness);
+  const h = getHue(base, color);
+
+  return `lch(${l}% ${c} ${h})`;
+}
+
+/**
+ * Gets the RGB values as a string hex of a hash plus 6 numbers.
+ *
+ * @param {number} base The base hue, in the range [0-360)
+ * @param {number} color The color code, in the range of [0-9]
+ * @param {number} brightness The brightenss, in the range of [0-9]
+ */
+export function getRgbHex(base, color, brightness) {
+  const lch = getLchCss(base, color, brightness);
+  const lchColor = new Color(lch);
+  const hex = lchColor
+    .to("srgb")
+    .toString({ format: "hex", inGamut: true })
+    .replace(/^#(\d)(\d)(\d)$/, "#$1$1$2$2$3$3");
+
+  return hex;
+}
+
+/**
+ * Gets the RGB values as an array of three numbers.
+ *
+ * @param {number} base The base hue, in the range [0-360)
+ * @param {number} color The color code, in the range of [0-9]
+ * @param {number} brightness The brightenss, in the range of [0-9]
+ */
+export function getRgbArray(base, color, brightness) {
+  const hex = getRgbHex(base, color, brightness);
+  const r = parseInt(hex.substring(1, 3), "16");
+  const g = parseInt(hex.substring(3, 5), "16");
+  const b = parseInt(hex.substring(5, 7), "16");
+
+  return [r, g, b];
+}