feat: Role gradient colours

#10986

src/util/Constants.js

@@ -1044,6 +1044,21 @@ exports.Colors = {
   NOT_QUITE_BLACK: 0x23272a,
 };
 
+/**
+ * Holographic color values for role styling.
+ * When using `tertiaryColor`, the API enforces these specific values for holographic effect.
+ *
+ * * PRIMARY: 11127295 (0xA9FFFF)
+ * * SECONDARY: 16759788 (0xFFCCCC)
+ * * TERTIARY: 16761760 (0xFFE0A0)
+ * @typedef {Object<string, number>} HolographicStyle
+ */
+exports.HolographicStyles = {
+  PRIMARY: 11_127_295,
+  SECONDARY: 16_759_788,
+  TERTIARY: 16_761_760,
+};
+
 /**
  * The value set for the explicit content filter levels for a guild:
  * * DISABLED
@@ -1895,4 +1910,5 @@ function createEnum(keys) {
  * @property {Object<WebhookType, number>} WebhookTypes The value set for a webhooks type.
  * @property {WSCodes} WSCodes The types of WebSocket error codes.
  * @property {Object<WSEventType, WSEventType>} WSEvents The type of a WebSocket message event.
+ * @property {HolographicStyle} HolographicStyles Holographic color values for role styling.
  */