MyBB Forum Announcement Bar

[Chamimnya]

Hello!

I recently decided to add announcements to my forum. Ones that are similiar to the ones used by MyBB (the coloured ones at the index)



I got them working with the Announcement plugin, but I'm wondering, what are the HTML colour codes used for the:
Yellow background & borders
Green background & borders
Blue background & borders
Red background & borders
(I know there isn't a red one but I can't seem to perfect mine, really bad with HTML colours..)

Thanks all.