what are you asking about. be more specify please

mid century /modern
looking for chairs for a 2 chair concept . some color , straight arms..

what is the color palette of the rest of the room that the sofa is going intO?

Hi emma1rich,
To the other posters' points, it's hard to recommend options without knowing more about or seeing the space the sofa & chairs will be in, ie what other items you may already have or want for the room (like a rug, tables). Also knowing general budget range would help too.
In the meantime, for MCM/streamlined style chairs, check out Mitchell Gold, Room & Board, Crate & Barrel, West Elm, Apt2b, CB2. You'll find lots of good choices with all of those places as well as some good room inspiration photos.