feat: unify pastel application into single playground and remove standalone pages

lib/pastel/utils/color.ts

@@ -1,30 +1,3 @@
-/**
- * Calculate relative luminance of a color
- * Based on WCAG 2.1 specification
- */
-export function getRelativeLuminance(r: number, g: number, b: number): number {
-  const [rs, gs, bs] = [r, g, b].map((c) => {
-    const sRGB = c / 255;
-    return sRGB <= 0.03928 ? sRGB / 12.92 : Math.pow((sRGB + 0.055) / 1.055, 2.4);
-  });
-  return 0.2126 * rs + 0.7152 * gs + 0.0722 * bs;
-}
-
-/**
- * Calculate contrast ratio between two colors
- * Returns ratio from 1 to 21
- */
-export function getContrastRatio(
-  fg: { r: number; g: number; b: number },
-  bg: { r: number; g: number; b: number }
-): number {
-  const l1 = getRelativeLuminance(fg.r, fg.g, fg.b);
-  const l2 = getRelativeLuminance(bg.r, bg.g, bg.b);
-  const lighter = Math.max(l1, l2);
-  const darker = Math.min(l1, l2);
-  return (lighter + 0.05) / (darker + 0.05);
-}
-
 /**
  * Parse hex color to RGB
  */
@@ -38,20 +11,3 @@ export function hexToRgb(hex: string): { r: number; g: number; b: number } | nul
       }
     : null;
 }
-
-/**
- * Check if a contrast ratio meets WCAG standards
- */
-export function checkWCAGCompliance(ratio: number) {
-  return {
-    aa: {
-      normalText: ratio >= 4.5,
-      largeText: ratio >= 3,
-      ui: ratio >= 3,
-    },
-    aaa: {
-      normalText: ratio >= 7,
-      largeText: ratio >= 4.5,
-    },
-  };
-}