[irc] Partially fix IRC colors (#1594)

Doesn't fix #1379 but it is a big step forward.

Needs some "real life" testing, but should be good.

src/providers/twitch/TwitchCommon.hpp

@@ -1,5 +1,6 @@
 #pragma once
 
+#include <QColor>
 #include <QString>
 
 namespace chatterino {
@@ -11,4 +12,22 @@ inline QByteArray getDefaultClientID()
     return QByteArray("7ue61iz46fz11y3cugd0l3tawb4taal");
 }
 
+static const std::vector<QColor> TWITCH_USERNAME_COLORS = {
+    {255, 0, 0},      // Red
+    {0, 0, 255},      // Blue
+    {0, 255, 0},      // Green
+    {178, 34, 34},    // FireBrick
+    {255, 127, 80},   // Coral
+    {154, 205, 50},   // YellowGreen
+    {255, 69, 0},     // OrangeRed
+    {46, 139, 87},    // SeaGreen
+    {218, 165, 32},   // GoldenRod
+    {210, 105, 30},   // Chocolate
+    {95, 158, 160},   // CadetBlue
+    {30, 144, 255},   // DodgerBlue
+    {255, 105, 180},  // HotPink
+    {138, 43, 226},   // BlueViolet
+    {0, 255, 127},    // SpringGreen
+};
+
 }  // namespace chatterino