feat: update aa_colors() to custom RGB palette

Replace Tableau10-based palette with project-specific amino acid colors.
Set fMet, Ile2, and SeC to match their parent amino acids (Met, Ile, Ser).

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: jayhesselberth

R/palettes.R

@@ -13,29 +13,29 @@
 #' aa_colors()
 aa_colors <- function() {
   c(
-    "Ala" = "#1f77b4",
-    "Arg" = "#ff7f0e",
-    "Asn" = "#2ca02c",
-    "Asp" = "#d62728",
-    "Cys" = "#9467bd",
-    "Gln" = "#8c564b",
-    "Glu" = "#e377c2",
-    "Gly" = "#7f7f7f",
-    "His" = "#bcbd22",
-    "Ile" = "#17becf",
-    "Leu" = "#aec7e8",
-    "Lys" = "#ffbb78",
-    "Met" = "#98df8a",
-    "Phe" = "#ff9896",
-    "Pro" = "#c5b0d5",
-    "Ser" = "#c49c94",
-    "Thr" = "#f7b6d2",
-    "Trp" = "#c7c7c7",
-    "Tyr" = "#dbdb8d",
-    "Val" = "#9edae5",
-    "fMet" = "#393b79",
-    "Ile2" = "#5254a3",
-    "SeC" = "#6b6ecf"
+    "Ala" = "#D5F6E2",
+    "Arg" = "#A5C2F6",
+    "Asn" = "#FF9902",
+    "Asp" = "#9A00FF",
+    "Cys" = "#D9B5FF",
+    "Gln" = "#44B3E1",
+    "Glu" = "#D10C0D",
+    "Gly" = "#000000",
+    "His" = "#0070C0",
+    "Ile" = "#FFFF00",
+    "Leu" = "#FF00FF",
+    "Lys" = "#FFD9AF",
+    "Met" = "#ADADAD",
+    "Phe" = "#C99D89",
+    "Pro" = "#12501A",
+    "Ser" = "#FFC000",
+    "Thr" = "#002060",
+    "Trp" = "#800000",
+    "Tyr" = "#47D359",
+    "Val" = "#FFCAE2",
+    "fMet" = "#ADADAD",
+    "Ile2" = "#FFFF00",
+    "SeC" = "#FFC000"
   )
 }