diff --git a/web/src/helpers/render.jsx b/web/src/helpers/render.jsx
index 36aa7cbe9..14b87334f 100644
--- a/web/src/helpers/render.jsx
+++ b/web/src/helpers/render.jsx
@@ -167,21 +167,21 @@ export const getModelCategories = (() => {
       gemini: {
         label: 'Gemini',
         icon: <Gemini.Color />,
-        filter: (model) => 
-          model.model_name.toLowerCase().includes('gemini') || 
+        filter: (model) =>
+          model.model_name.toLowerCase().includes('gemini') ||
           model.model_name.toLowerCase().includes('gemma') ||
-          model.model_name.toLowerCase().includes('learnlm') || 
+          model.model_name.toLowerCase().includes('learnlm') ||
           model.model_name.toLowerCase().startsWith('embedding-') ||
           model.model_name.toLowerCase().includes('text-embedding-004') ||
-          model.model_name.toLowerCase().includes('imagen-4') || 
-          model.model_name.toLowerCase().includes('veo-') || 
-          model.model_name.toLowerCase().includes('aqa') ,
+          model.model_name.toLowerCase().includes('imagen-4') ||
+          model.model_name.toLowerCase().includes('veo-') ||
+          model.model_name.toLowerCase().includes('aqa'),
       },
       moonshot: {
         label: 'Moonshot',
         icon: <Moonshot />,
-        filter: (model) => 
-          model.model_name.toLowerCase().includes('moonshot') || 
+        filter: (model) =>
+          model.model_name.toLowerCase().includes('moonshot') ||
           model.model_name.toLowerCase().includes('kimi'),
       },
       zhipu: {
@@ -189,8 +189,8 @@ export const getModelCategories = (() => {
         icon: <Zhipu.Color />,
         filter: (model) =>
           model.model_name.toLowerCase().includes('chatglm') ||
-          model.model_name.toLowerCase().includes('glm-') || 
-          model.model_name.toLowerCase().includes('cogview') || 
+          model.model_name.toLowerCase().includes('glm-') ||
+          model.model_name.toLowerCase().includes('cogview') ||
           model.model_name.toLowerCase().includes('cogvideo'),
       },
       qwen: {
@@ -206,8 +206,8 @@ export const getModelCategories = (() => {
       minimax: {
         label: 'MiniMax',
         icon: <Minimax.Color />,
-        filter: (model) => 
-          model.model_name.toLowerCase().includes('abab') || 
+        filter: (model) =>
+          model.model_name.toLowerCase().includes('abab') ||
           model.model_name.toLowerCase().includes('minimax'),
       },
       baidu: {
@@ -233,7 +233,7 @@ export const getModelCategories = (() => {
       cohere: {
         label: 'Cohere',
         icon: <Cohere.Color />,
-        filter: (model) => 
+        filter: (model) =>
           model.model_name.toLowerCase().includes('command') ||
           model.model_name.toLowerCase().includes('c4ai-') ||
           model.model_name.toLowerCase().includes('embed-'),
@@ -256,7 +256,7 @@ export const getModelCategories = (() => {
       mistral: {
         label: 'Mistral AI',
         icon: <Mistral.Color />,
-        filter: (model) => 
+        filter: (model) =>
           model.model_name.toLowerCase().includes('mistral') ||
           model.model_name.toLowerCase().includes('codestral') ||
           model.model_name.toLowerCase().includes('pixtral') ||
@@ -602,6 +602,34 @@ export function stringToColor(str) {
   return colors[i];
 }
 
+// High-contrast color palette for group tags (avoids similar blue/teal shades)
+const groupColors = [
+  'red',
+  'orange',
+  'yellow',
+  'lime',
+  'green',
+  'cyan',
+  'blue',
+  'indigo',
+  'violet',
+  'purple',
+  'pink',
+  'amber',
+  'grey',
+];
+
+export function groupToColor(str) {
+  // Use a better hash algorithm for more even distribution
+  let hash = 0;
+  for (let i = 0; i < str.length; i++) {
+    hash = (hash << 5) - hash + str.charCodeAt(i);
+    hash = hash & hash;
+  }
+  hash = Math.abs(hash);
+  return groupColors[hash % groupColors.length];
+}
+
 // 渲染带有模型图标的标签
 export function renderModelTag(modelName, options = {}) {
   const {
@@ -670,7 +698,7 @@ export function renderGroup(group) {
     <span key={group}>
       {groups.map((group) => (
         <Tag
-          color={tagColors[group] || stringToColor(group)}
+          color={tagColors[group] || groupToColor(group)}
           key={group}
           shape='circle'
           onClick={async (event) => {