diff --git a/source/content-scripts/features/username-colors.ts b/source/content-scripts/features/username-colors.ts
index e09ce3d..fc1f467 100644
--- a/source/content-scripts/features/username-colors.ts
+++ b/source/content-scripts/features/username-colors.ts
@@ -1,21 +1,23 @@
-import {log, querySelectorAll} from "../../utilities/exports.js";
-import {type UsernameColorsData} from "../../storage/exports.js";
+import { log, querySelectorAll, getColorFromStringHash, isColorBright } from "../../utilities/exports.js";
+import { type UsernameColorsData } from "../../storage/exports.js";
 
-export function runUsernameColorsFeature(
+export async function runUsernameColorsFeature(
   data: UsernameColorsData,
   anonymizeUsernamesEnabled: boolean,
+  randomizeUsernameColorsEnabled: boolean,
 ) {
-  const count = usernameColors(data, anonymizeUsernamesEnabled);
+  const count = await usernameColors(data, anonymizeUsernamesEnabled, randomizeUsernameColorsEnabled);
   log(`Username Colors: Applied ${count} colors.`);
 }
 
-function usernameColors(
+async function usernameColors(
   data: UsernameColorsData,
   anonymizeUsernamesEnabled: boolean,
-): number {
+  randomizeUsernameColorsEnabled: boolean,
+): Promise<number> {
   const usernameColors = new Map<string, string>();
   for (const {
-    value: {color, username: usernames},
+    value: { color, username: usernames },
   } of data) {
     for (const username of usernames.split(",")) {
       usernameColors.set(username.trim().toLowerCase(), color);
@@ -40,12 +42,18 @@ function usernameColors(
     }
 
     element.classList.add("trx-username-colors");
-    const color = usernameColors.get(target);
-    if (color === undefined) {
+    let color = usernameColors.get(target);
+    if (color) {
+      element.style.color = color;
+    } else if (randomizeUsernameColorsEnabled) {
+      const randomColor = await getColorFromStringHash(target);
+      const fontColor = isColorBright(randomColor) ? "#000" : "#FFF"
+      element.style.setProperty("--background-color", randomColor);
+      element.style.setProperty("--text-color", fontColor);
+      element.classList.add("trx-colored-username")
+    } else {
       continue;
     }
-
-    element.style.color = color;
     count += 1;
   }
 
diff --git a/source/content-scripts/setup.tsx b/source/content-scripts/setup.tsx
index ad8dedd..5478a19 100644
--- a/source/content-scripts/setup.tsx
+++ b/source/content-scripts/setup.tsx
@@ -95,7 +95,8 @@ async function initialize() {
   if (enabledFeatures.value.has(Feature.UsernameColors)) {
     observerFeatures.push(async () => {
       const data = await fromStorage(Feature.UsernameColors);
-      runUsernameColorsFeature(data, anonymizeUsernamesEnabled);
+      const randomizeUsernameColors = await fromStorage(Data.RandomizeUsernameColors);
+      runUsernameColorsFeature(data, anonymizeUsernamesEnabled, randomizeUsernameColors.value);
     });
   }
 
diff --git a/source/options/components/username-colors.tsx b/source/options/components/username-colors.tsx
index a078e2b..0cb424d 100644
--- a/source/options/components/username-colors.tsx
+++ b/source/options/components/username-colors.tsx
@@ -4,15 +4,18 @@ import {
   type UsernameColorsData,
   type UsernameColor,
   Feature,
+  Data,
   createValueUsernamecolor,
   fromStorage,
 } from "../../storage/exports.js";
 import {Setting, type SettingProps} from "./index.js";
+import { Value } from "@holllo/webextension-storage";
 
 type State = {
   previewChecked: "off" | "foreground" | "background";
   usernameColors: UsernameColorsData;
   usernameColorsToRemove: UsernameColorsData;
+  randomizeChecked: Value<boolean>;
 };
 
 export class UsernameColorsSetting extends Component<SettingProps, State> {
@@ -23,11 +26,12 @@ export class UsernameColorsSetting extends Component<SettingProps, State> {
       previewChecked: "off",
       usernameColors: undefined!,
       usernameColorsToRemove: [],
+      randomizeChecked: undefined!,
     };
   }
 
   async componentDidMount() {
-    this.setState({usernameColors: await fromStorage(Feature.UsernameColors)});
+    this.setState({usernameColors: await fromStorage(Feature.UsernameColors), randomizeChecked: await fromStorage(Data.RandomizeUsernameColors)});
   }
 
   addNewColor = async () => {
@@ -100,6 +104,13 @@ export class UsernameColorsSetting extends Component<SettingProps, State> {
     this.setState({previewChecked});
   };
 
+  toggleRandomized = () => {
+    const randomizeChecked = this.state.randomizeChecked;
+    randomizeChecked.value = !randomizeChecked.value;
+    void randomizeChecked.save();
+    this.setState({randomizeChecked})
+  }
+
   onInput = (event: Event, id: number, key: "color" | "username") => {
     const colorIndex = this.state.usernameColors.findIndex(
       ({value}) => value.id === id,
@@ -115,7 +126,7 @@ export class UsernameColorsSetting extends Component<SettingProps, State> {
   };
 
   render() {
-    const {previewChecked, usernameColors} = this.state;
+    const {previewChecked, usernameColors, randomizeChecked} = this.state;
     if (usernameColors === undefined) {
       return;
     }
@@ -163,6 +174,7 @@ export class UsernameColorsSetting extends Component<SettingProps, State> {
       );
     });
 
+
     return (
       <Setting {...this.props}>
         <p class="info">
@@ -170,6 +182,9 @@ export class UsernameColorsSetting extends Component<SettingProps, State> {
           <br />
           You can enter multiple usernames separated by a comma if you want them
           to use the same color.
+          <br />
+          If randomize is selected then all usernames will be given a random background color. 
+          This will not override colors you have manually assigned.
         </p>
 
         <div class="username-colors-controls">
@@ -184,6 +199,19 @@ export class UsernameColorsSetting extends Component<SettingProps, State> {
           <button class="button" onClick={this.saveChanges}>
             Save Changes
           </button>
+
+          <ul class="checkbox-list">
+            <li>
+              <label>
+                <input 
+                  type="checkbox"
+                  checked={randomizeChecked.value}
+                  onClick={this.toggleRandomized}
+                />
+                Randomize Username Colors
+              </label>
+            </li>
+          </ul>
         </div>
 
         {editors}
diff --git a/source/scss/_shared.scss b/source/scss/_shared.scss
index 9d77dda..372d637 100644
--- a/source/scss/_shared.scss
+++ b/source/scss/_shared.scss
@@ -2,3 +2,10 @@
   /* stylelint-disable-next-line declaration-no-important */
   display: none !important;
 }
+
+.trx-colored-username {
+  background-color: var(--background-color);
+  border-radius: 3px;
+  color: var(--text-color);
+  padding: 2px 3px;
+}
\ No newline at end of file
diff --git a/source/storage/enums.ts b/source/storage/enums.ts
index c5021d5..2c5364a 100644
--- a/source/storage/enums.ts
+++ b/source/storage/enums.ts
@@ -22,5 +22,6 @@ export enum Data {
   EnabledFeatures = "enabled-features",
   KnownGroups = "known-groups",
   LatestActiveFeatureTab = "latest-active-feature-tab",
+  RandomizeUsernameColors = "randomize-username-colors",
   Version = "data-version",
 }
diff --git a/source/storage/exports.ts b/source/storage/exports.ts
index 24d38ab..aab4829 100644
--- a/source/storage/exports.ts
+++ b/source/storage/exports.ts
@@ -58,6 +58,13 @@ export const storageValues = {
     value: "2.0.0",
     storage: browser.storage.sync,
   }),
+  [Data.RandomizeUsernameColors]: createValue({
+    deserialize: (input) => JSON.parse(input) as boolean,
+    serialize: (input) => JSON.stringify(input),
+    key: Data.RandomizeUsernameColors,
+    value: false,
+    storage: browser.storage.sync,
+  }),
   [Feature.HideTopics]: collectHideTopicsData(),
   [Feature.HideVotes]: createValue({
     deserialize: (input) => JSON.parse(input) as HideVotesData,
diff --git a/source/utilities/text.ts b/source/utilities/text.ts
index 2f97e6a..3f98531 100644
--- a/source/utilities/text.ts
+++ b/source/utilities/text.ts
@@ -16,3 +16,22 @@ export function pluralize(
 
   return plural ?? singular + "s";
 }
+
+/** Return a hash for a given username */
+export async function hashString(str: string): Promise<string> {
+  const encoder = new TextEncoder();
+  const data = encoder.encode(str)
+  const hashBuffer = await crypto.subtle.digest("SHA-256", data);
+  const hashArray = Array.from(new Uint8Array(hashBuffer));
+  const hashString = hashArray
+    .map((b) => b.toString())
+    .join("");
+  return hashString;
+}
+
+/** Return a color hex code based on hash of username string */
+export async function getColorFromStringHash(username: string): Promise<string> {
+  const usernameHash = parseInt(await hashString(username));
+  const color = Math.abs(usernameHash % parseInt("0xFFFFFF")).toString(16)
+  return `#${color}`.padEnd(7, "0")
+}
\ No newline at end of file