diff --git a/bun.lockb b/bun.lockb
index 1248ee3..fd715e2 100755
Binary files a/bun.lockb and b/bun.lockb differ
diff --git a/package.json b/package.json
index 19ed73a..5b1fbea 100644
--- a/package.json
+++ b/package.json
@@ -9,10 +9,12 @@
     "typescript": "^5.0.0"
   },
   "dependencies": {
+    "@types/color-hash": "^2.0.0",
     "@types/imapflow": "^1.0.19",
     "@types/jsdom": "^21.1.7",
     "@types/mailparser": "^3.4.5",
     "blakejs": "^1.2.1",
+    "color-hash": "^2.0.2",
     "imapflow": "^1.0.171",
     "isomorphic-dompurify": "^2.19.0",
     "jsdom": "^25.0.1",
diff --git a/src/threads/refresh.ts b/src/threads/refresh.ts
index f5c23a5..3768588 100644
--- a/src/threads/refresh.ts
+++ b/src/threads/refresh.ts
@@ -7,6 +7,7 @@ import {config} from "../config.ts";
 import { marked } from "marked";
 import {sanitizeHtml} from "../mail/sanitize.ts";
 import {formatThreadAddress} from "./id.ts";
+import ColorHash from "color-hash";
 
 export async function refreshThreadsEntirely(): Promise<void> {
     await withClient(async client => {
@@ -46,6 +47,7 @@ export async function refreshThreadsEntirely(): Promise<void> {
             // Pass 1: create all the ThreadComment instances and make a map by their ID
             const commentsByHash: {[hash: string]: ThreadComment} = {}
             const messages = messagesByThread[threadId]
+            const colorHash = new ColorHash();
             for ( const message of messages ) {
                 if (
                     !threadData.refresh.markers[message.mailbox]
@@ -62,6 +64,7 @@ export async function refreshThreadsEntirely(): Promise<void> {
                         name: message.from.name || '(anonymous)',
                         mailId: sha256(message.from.address!.toLowerCase()),
                         domainId: sha256(message.from.address!.toLowerCase().split('@').reverse()[0]),
+                        color: colorHash.hex(message.from.address!.toLowerCase()),
                     },
                     date: message.date,
                     subject: message.subject,
diff --git a/src/types.ts b/src/types.ts
index ef3f782..3dc28f4 100644
--- a/src/types.ts
+++ b/src/types.ts
@@ -51,6 +51,7 @@ export type ThreadUser = {
     name: string,
     mailId: string,
     domainId: string,
+    color: string,
 }
 
 export type ThreadComment = {