diff --git a/src/components/detail/RatingBadge.tsx b/src/components/detail/RatingBadge.tsx
index 87f74c2..242f772 100644
--- a/src/components/detail/RatingBadge.tsx
+++ b/src/components/detail/RatingBadge.tsx
@@ -9,18 +9,19 @@ interface RatingBadgeProps {
 export function RatingBadge({ source, value }: RatingBadgeProps) {
   const info = RATING_SOURCES[source];
   if (!info) return null;
+  const maskColor = info.colorForValue ? info.colorForValue(value) : info.maskColor;
   return (
     <span style={styles.badge} title={info.label}>
       {info.lucideIcon === 'popcorn' ? (
         <Popcorn size={18} color={info.iconColor} strokeWidth={2} />
-      ) : info.maskColor ? (
+      ) : maskColor ? (
         <span
           role="img"
           aria-label={info.label}
           style={{
             ...styles.logo,
             ...styles.maskedLogo,
-            backgroundColor: info.maskColor,
+            backgroundColor: maskColor,
             maskImage: `url(${info.icon})`,
             WebkitMaskImage: `url(${info.icon})`,
           }}
diff --git a/src/components/detail/ratingSources.ts b/src/components/detail/ratingSources.ts
index a463430..4ab1ace 100644
--- a/src/components/detail/ratingSources.ts
+++ b/src/components/detail/ratingSources.ts
@@ -3,6 +3,7 @@ export interface RatingSourceInfo {
   label: string;
   format: (value: number) => string;
   maskColor?: string;
+  colorForValue?: (value: number) => string;
   lucideIcon?: 'popcorn';
   iconColor?: string;
 }
@@ -11,6 +12,22 @@ const percent = (value: number) => `${Math.round(value)}%`;
 const outOfTen = (value: number) => value.toFixed(1);
 const bareScore = (value: number) => `${Math.round(value)}`;
 
+const METACRITIC_GREEN = '#6C3';
+const METACRITIC_YELLOW = '#FC3';
+const METACRITIC_RED = '#F33';
+
+const metacriticCriticColor = (value: number) => {
+  if (value >= 61) return METACRITIC_GREEN;
+  if (value >= 40) return METACRITIC_YELLOW;
+  return METACRITIC_RED;
+};
+
+const metacriticUserColor = (value: number) => {
+  if (value >= 7.5) return METACRITIC_GREEN;
+  if (value >= 5.0) return METACRITIC_YELLOW;
+  return METACRITIC_RED;
+};
+
 export const RATING_SOURCES: Record<string, RatingSourceInfo> = {
   imdb: { icon: '/imdb.svg', label: 'IMDb', format: outOfTen },
   tmdb: { icon: '/tmdb.svg', label: 'TMDB', format: percent },
@@ -18,8 +35,8 @@ export const RATING_SOURCES: Record<string, RatingSourceInfo> = {
   letterboxd: { icon: '/letterboxd.svg', label: 'Letterboxd', format: outOfTen },
   tomatoes: { icon: '/rottentomatoes.svg', label: 'Rotten Tomatoes (Critics)', format: percent, maskColor: '#FA320A' },
   popcorn: { label: 'Rotten Tomatoes (Audience)', format: percent, lucideIcon: 'popcorn', iconColor: '#FA320A' },
-  metacritic: { icon: '/metacritic.svg', label: 'Metacritic', format: bareScore, maskColor: '#66CC33' },
-  metacriticuser: { icon: '/metacritic.svg', label: 'Metacritic Users', format: outOfTen, maskColor: '#FFCC33' },
+  metacritic: { icon: '/metacritic.svg', label: 'Metacritic', format: bareScore, maskColor: METACRITIC_GREEN, colorForValue: metacriticCriticColor },
+  metacriticuser: { icon: '/metacritic.svg', label: 'Metacritic Users', format: outOfTen, maskColor: METACRITIC_GREEN, colorForValue: metacriticUserColor },
   myanimelist: { icon: '/mal.svg', label: 'MyAnimeList', format: outOfTen },
 };