diff --git a/src/plugins/clientTheme/clientTheme.css b/src/plugins/clientTheme/clientTheme.css
new file mode 100644
index 000000000..023f88bd2
--- /dev/null
+++ b/src/plugins/clientTheme/clientTheme.css
@@ -0,0 +1,24 @@
+.client-theme-settings {
+    display: flex;
+    flex-direction: column;
+}
+
+.client-theme-container {
+    display: flex;
+    flex-direction: row;
+    justify-content: space-between;
+}
+
+.client-theme-settings-labels {
+    display: flex;
+    flex-direction: column;
+    justify-content: flex-start;
+}
+
+.client-theme-container > [class^="colorSwatch"] > [class^="swatch"] {
+    border: thin solid var(--background-modifier-accent) !important;
+}
+
+.client-theme-warning {
+    color: var(--text-danger);
+}
diff --git a/src/plugins/clientTheme/index.tsx b/src/plugins/clientTheme/index.tsx
new file mode 100644
index 000000000..3e07b15fd
--- /dev/null
+++ b/src/plugins/clientTheme/index.tsx
@@ -0,0 +1,228 @@
+/*
+ * Vencord, a Discord client mod
+ * Copyright (c) 2023 Vendicated and contributors
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
+import "./clientTheme.css";
+
+import { definePluginSettings } from "@api/Settings";
+import { Devs } from "@utils/constants";
+import { getTheme, Theme } from "@utils/discord";
+import { Margins } from "@utils/margins";
+import { classes } from "@utils/misc";
+import definePlugin, { OptionType } from "@utils/types";
+import { findByCodeLazy } from "@webpack";
+import { Button, Forms } from "@webpack/common";
+
+const ColorPicker = findByCodeLazy(".Messages.USER_SETTINGS_PROFILE_COLOR_SELECT_COLOR");
+
+const colorPresets = [
+    "#1E1514", "#172019", "#13171B", "#1C1C28", "#402D2D",
+    "#3A483D", "#344242", "#313D4B", "#2D2F47", "#322B42",
+    "#3C2E42", "#422938"
+];
+
+function onPickColor(color: number) {
+    let hexColor = color.toString(16);
+
+    while (hexColor.length < 6) {
+        hexColor = "0" + hexColor;
+    }
+
+    settings.store.color = hexColor;
+    updateColorVars(hexColor);
+}
+
+function ThemeSettings() {
+    const lightnessWarning = hexToLightness(settings.store.color) > 45;
+    const lightModeWarning = getTheme() === Theme.Light;
+
+    return (
+        <div className="client-theme-settings">
+            <div className="client-theme-container">
+                <div className="client-theme-settings-labels">
+                    <Forms.FormTitle tag="h3">Theme Color</Forms.FormTitle>
+                    <Forms.FormText>Add a color to your Discord client theme</Forms.FormText>
+                </div>
+                <ColorPicker
+                    color={parseInt(settings.store.color, 16)}
+                    onChange={onPickColor}
+                    showEyeDropper={false}
+                    suggestedColors={colorPresets}
+                />
+            </div>
+            {lightnessWarning || lightModeWarning
+                ? <div>
+                    <Forms.FormDivider className={classes(Margins.top8, Margins.bottom8)} />
+                    <Forms.FormText className="client-theme-warning">Your theme won't look good:</Forms.FormText>
+                    {lightnessWarning && <Forms.FormText className="client-theme-warning">Selected color is very light</Forms.FormText>}
+                    {lightModeWarning && <Forms.FormText className="client-theme-warning">Light mode isn't supported</Forms.FormText>}
+                </div>
+                : null}
+        </div>
+    );
+}
+
+const settings = definePluginSettings({
+    color: {
+        description: "Color your Discord client theme will be based around. Light mode isn't supported",
+        type: OptionType.COMPONENT,
+        default: "313338",
+        component: () => <ThemeSettings />
+    },
+    resetColor: {
+        description: "Reset Theme Color",
+        type: OptionType.COMPONENT,
+        default: "313338",
+        component: () => (
+            <Button onClick={() => onPickColor(0x313338)}>
+                Reset Theme Color
+            </Button>
+        )
+    }
+});
+
+export default definePlugin({
+    name: "ClientTheme",
+    authors: [Devs.F53],
+    description: "Recreation of the old client theme experiment. Add a color to your Discord client theme",
+    settings,
+
+    patches: [
+        {
+            find: "Could not find app-mount",
+            replacement: {
+                match: /(?<=Could not find app-mount"\))/,
+                replace: ",$self.addThemeInitializer()"
+            }
+        }
+    ],
+
+    addThemeInitializer() {
+        document.addEventListener("DOMContentLoaded", this.themeInitializer = () => {
+            updateColorVars(settings.store.color);
+            generateColorOffsets();
+        });
+    },
+
+    stop() {
+        document.removeEventListener("DOMContentLoaded", this.themeInitializer);
+        document.getElementById("clientThemeVars")?.remove();
+        document.getElementById("clientThemeOffsets")?.remove();
+    }
+});
+
+async function generateColorOffsets() {
+    const variableRegex = /(--primary-[5-9]\d{2}-hsl):.*?(\S*)%;/g;
+
+    const styleLinkNodes = document.querySelectorAll('link[rel="stylesheet"]');
+    const variableLightness = {} as Record<string, number>;
+
+    // Search all stylesheets for color variables
+    for (const styleLinkNode of styleLinkNodes) {
+        const cssLink = styleLinkNode.getAttribute("href");
+        if (!cssLink) continue;
+
+        const res = await fetch(cssLink);
+        const cssString = await res.text();
+
+        // Get lightness values of --primary variables >=500
+        let variableMatch = variableRegex.exec(cssString);
+        while (variableMatch !== null) {
+            const [, variable, lightness] = variableMatch;
+            variableLightness[variable] = parseFloat(lightness);
+            variableMatch = variableRegex.exec(cssString);
+        }
+    }
+
+    // Generate offsets
+    const lightnessOffsets = Object.entries(variableLightness)
+        .map(([key, lightness]) => {
+            const lightnessOffset = lightness - variableLightness["--primary-600-hsl"];
+            const plusOrMinus = lightnessOffset >= 0 ? "+" : "-";
+            return `${key}: var(--theme-h) var(--theme-s) calc(var(--theme-l) ${plusOrMinus} ${Math.abs(lightnessOffset).toFixed(2)}%);`;
+        })
+        .join("\n");
+
+    const style = document.createElement("style");
+    style.setAttribute("id", "clientThemeOffsets");
+    style.textContent = `:root:root {
+        ${lightnessOffsets}
+    }`;
+    document.head.appendChild(style);
+}
+
+function updateColorVars(color: string) {
+    const { hue, saturation, lightness } = hexToHSL(color);
+
+    let style = document.getElementById("clientThemeVars");
+    if (!style) {
+        style = document.createElement("style");
+        style.setAttribute("id", "clientThemeVars");
+        document.head.appendChild(style);
+    }
+
+    style.textContent = `:root {
+        --theme-h: ${hue};
+        --theme-s: ${saturation}%;
+        --theme-l: ${lightness}%;
+    }`;
+}
+
+// https://css-tricks.com/converting-color-spaces-in-javascript/
+function hexToHSL(hexCode: string) {
+    // Hex => RGB normalized to 0-1
+    const r = parseInt(hexCode.substring(0, 2), 16) / 255;
+    const g = parseInt(hexCode.substring(2, 4), 16) / 255;
+    const b = parseInt(hexCode.substring(4, 6), 16) / 255;
+
+    // RGB => HSL
+    const cMax = Math.max(r, g, b);
+    const cMin = Math.min(r, g, b);
+    const delta = cMax - cMin;
+
+    let hue: number, saturation: number, lightness: number;
+
+    lightness = (cMax + cMin) / 2;
+
+    if (delta === 0) {
+        // If r=g=b then the only thing that matters is lightness
+        hue = 0;
+        saturation = 0;
+    } else {
+        // Magic
+        saturation = delta / (1 - Math.abs(2 * lightness - 1));
+
+        if (cMax === r)
+            hue = ((g - b) / delta) % 6;
+        else if (cMax === g)
+            hue = (b - r) / delta + 2;
+        else
+            hue = (r - g) / delta + 4;
+        hue *= 60;
+        if (hue < 0)
+            hue += 360;
+    }
+
+    // Move saturation and lightness from 0-1 to 0-100
+    saturation *= 100;
+    lightness *= 100;
+
+    return { hue, saturation, lightness };
+}
+
+// Minimized math just for lightness, lowers lag when changing colors
+function hexToLightness(hexCode) {
+    // Hex => RGB normalized to 0-1
+    const r = parseInt(hexCode.substring(0, 2), 16) / 255;
+    const g = parseInt(hexCode.substring(2, 4), 16) / 255;
+    const b = parseInt(hexCode.substring(4, 6), 16) / 255;
+
+    const cMax = Math.max(r, g, b);
+    const cMin = Math.min(r, g, b);
+
+    const lightness = 100 * ((cMax + cMin) / 2);
+
+    return lightness;
+}
diff --git a/src/utils/constants.ts b/src/utils/constants.ts
index 3db2e64f8..7f555d322 100644
--- a/src/utils/constants.ts
+++ b/src/utils/constants.ts
@@ -267,6 +267,10 @@ export const Devs = /* #__PURE__*/ Object.freeze({
         name: "Dziurwa",
         id: 1001086404203389018n
     },
+    F53: {
+        name: "F53",
+        id: 280411966126948353n
+    },
     AutumnVN: {
         name: "AutumnVN",
         id: 393694671383166998n