Parameters of TgApi.createForumTopic method.
Unique identifier for the target chat or username of the target supergroup (in the format @supergroupusername)
optional
icon_color: number
Color of the topic icon in RGB format. Currently, must be one of 7322096 (0x6FB9F0), 16766590 (0xFFD67E), 13338331 (0xCB86DB), 9367192 (0x8EEE98), 16749490 (0xFF93B2), or 16478047 (0xFB6F5F)
optional
icon_custom_emoji_id: string
Unique identifier of the custom emoji shown as the topic icon. Use getForumTopicIconStickers to get all allowed custom emoji identifiers.