Final answer:
Lady Macbeth chastises Macbeth for his cowardice, stating her hands may be blood-stained like his, but unlike him, she refuses to exhibit guilt or fear, symbolized by a 'heart so white'.
Step-by-step explanation:
Lady Macbeth's statement, "My hands are of your color, but I shame to wear a heart so white," conveys her reproach towards Macbeth's display of fear and regret after the murder of King Duncan. The phrase "hands of your color" implies that her hands are also stained with blood, signifying guilt and complicity in the murder.
However, when she says she would be ashamed to have a "heart so white," she criticizes Macbeth for his cowardice and lack of resolve, as the color white symbolizes purity and cowardice in this context. Lady Macbeth prides herself on being resolute and unshaken by their actions, unlike Macbeth, who is visibly disturbed.