added MessageColor to represet special colors

src/messages/messagecolor.cpp

@@ -0,0 +1,38 @@
+#include "messagecolor.h"
+
+namespace chatterino {
+namespace messages {
+MessageColor::MessageColor(const QColor &color)
+    : type(Type::Custom)
+    , color(color)
+{
+}
+
+MessageColor::MessageColor(Type type)
+    : type(type)
+{
+}
+
+MessageColor::Type MessageColor::getType() const
+{
+    return this->type;
+}
+
+const QColor &MessageColor::getColor(ColorScheme &colorScheme) const
+{
+    switch (this->type) {
+        case Type::Custom:
+            return this->color;
+        case Type::Text:
+            return colorScheme.Text;
+        case Type::System:
+            return colorScheme.SystemMessageColor;
+        case Type::Link:
+            return colorScheme.TextLink;
+    }
+
+    static QColor _default;
+    return _default;
+}
+}
+}