ImGuiCol_ComboBg,// [unused since 1.53+] ComboBg has been merged with PopupBg, so a redirect isn't accurate.
//ImGuiCol_CloseButton, ImGuiCol_CloseButtonActive, ImGuiCol_CloseButtonHovered, // [unused since 1.60+] the close button now uses regular button colors.
ImGuiCol_COUNT,
//ImGuiCol_ComboBg, // [unused since 1.53+] ComboBg has been merged with PopupBg, so a redirect isn't accurate.