"My hands are of your color, but I shame to wear a heart so white." - Lady Macbeth (Act 2 Scene 2)
Lady Macbeth is insulting Macbeth she says this in response to his nervous and guilty attitude.
By saying "My hands are of your color" she means they are blood red, also, because she is just as guilty as he is. When she says "But I shame to wear a heart so white" she means she would be ashamed of having such a weak heart as Macbeth is suffering from at that point.