diff --git a/td/generate/scheme/td_api.tl b/td/generate/scheme/td_api.tl
index 374e579e..e9b52da7 100644
--- a/td/generate/scheme/td_api.tl
+++ b/td/generate/scheme/td_api.tl
@@ -501,7 +501,7 @@ secretChatStateClosed = SecretChatState;
 //@state State of the secret chat
 //@is_outbound True, if the chat was created by the current user; otherwise false
 //@ttl Current message Time To Live setting (self-destruct timer) for the chat, in seconds
-//@key_hash Hash of the currently used key for comparison with the hash of the chat partner's key. This is a string of 36 little-endian bytes, which must be split into groups of 2 bits, each denoting a pixel of one of 4 colors.
+//@key_hash Hash of the currently used key for comparison with the hash of the chat partner's key. This is a string of 36 little-endian bytes, which must be split into groups of 2 bits, each denoting a pixel of one of 4 colors FFFFFF, D5E6F3, 2D5775, and 2F99C9.
 //-The pixels must be used to make a 12x12 square image filled from left to right, top to bottom. Alternatively, the first 32 bytes of the hash can be converted to the hexadecimal format and printed as 32 2-digit hex numbers
 //@layer Secret chat layer; determines features supported by the other client. Video notes are supported if the layer >= 66; nested text entities and underline and strikethrough entities are supported if the layer >= 101
 secretChat id:int32 user_id:int32 state:SecretChatState is_outbound:Bool ttl:int32 key_hash:bytes layer:int32 = SecretChat;