[puzzle-geometry] Update icosahedron colors to be more vibrant and di…

…stinct.

This implements the colors from #336 (comment) with slight tweaks:

- Lavender: slightly lighter for better contrast with other colors
- Black: replaced with (very) dark gray to avoid blending with the foundation color.

src/cubing/puzzle-geometry/PuzzleGeometry.ts

@@ -286,6 +286,14 @@ enum PGColors {
   Aqua = "#3399ff",
   DarkGreen = "#008800",
   Lime = "#99ff00",
+  DarkGray = "#5c5c5c",
+  Teal = "#007a89",
+  Brown = "#7d3b11",
+  Lavender = "#b9a1ff",
+  SeaGreen = "#5ec4b6",
+  VeryDarkGray = "#292929",
+  Burgundy = "#980000",
+  Cerise = "#d41f69",
 }
 
 // TODO: change this back to a const JSON definition.
@@ -331,26 +339,26 @@ function defaultcolors(): any {
       D: PGColors.Gray,
     },
     20: {
-      R: "#db69f0",
-      C: "#178fde",
-      F: "#23238b",
-      E: "#9cc726",
-      L: "#2c212d",
-      U: "#177fa7",
-      A: "#e0de7f",
-      G: "#2b57c0",
-      I: "#41126b",
-      S: "#4b8c28",
-      H: "#7c098d",
-      J: "#7fe7b4",
-      B: "#85fb74",
-      K: "#3f4bc3",
-      D: "#0ff555",
-      M: "#f1c2c8",
-      O: "#58d340",
-      P: "#c514f2",
-      N: "#14494e",
-      Q: "#8b1be1",
+      R: PGColors.Yellow,
+      C: PGColors.Cerise,
+      F: PGColors.DarkGreen,
+      E: PGColors.DarkGray,
+      L: PGColors.Purple,
+      U: PGColors.White,
+      A: PGColors.Teal,
+      G: PGColors.Red,
+      I: PGColors.Brown,
+      S: PGColors.Lavender,
+      H: PGColors.Aqua,
+      J: PGColors.SeaGreen,
+      B: PGColors.Green,
+      K: PGColors.Cream,
+      D: PGColors.Gray,
+      M: PGColors.Pink,
+      O: PGColors.VeryDarkGray,
+      P: PGColors.Orange,
+      N: PGColors.Burgundy,
+      Q: PGColors.Blue,
     },
   };
 }