Despite everything, Trish is actually pretty serious about dressing up her tributes. Some ideas include blue and green shades, accent by circles and rings. Otherwise, contrasting colors (black and white, purple and yellow, day and night colors, etc.) Basically, she'll be going for "can't have one without the other" and "parts of a whole" motifs as well-- gloves. Lock and key. Peanut butter and jelly. Alternately, since I think there are only three tributes left? Primary colors would be an option-- so red, blue, yellow.