I think I’ve worked it out.
On the first night of the Democrat Convention, the color palette was all blues. The stage and trappings: all blues. Michelle Obama, wife of the candidate, shows up in blue and speaks here piece.
On the second night, Mrs. Clinton, former presidential candidate, showed up in orange. Bold. She spoke her piece.
On the third night, Mrs. Clinton, showed up in blue.
Orange is the opposite of blue in the color wheel (cf. primaries and secondaries).
Everything in these conventions is carefully planned.
Could it be that Mrs. Clinton was making a statement?
Do women ever make a statement with what they wear?