Una, I always wash my seersucker ones. They are light tones and lightweight, and they wash really well (cold, gentle, hang dry, iron).
I have washed my black ones, but then I started bringing them to the dry cleaners, and I will probably do the same with my burgundy ones. I find that stretch black doesn't hold up as well to machine washing, and burgundy may be the same. It really has to do with the color. The darker versions seem to look crisper longer when professionally cleaned and pressed, versus me doing them. But with your citron ones, I think you might be fine washing in cold.