Keep the same black, red and yellow relationship while changing the silhouette, shoe and amount of structure to suit the plan.
For a Low-Key Day
The sweatshirt-and-chino combination is the easiest to move in. Check that the crewneck hem sits comfortably at the hip and that the straight trousers do not catch on your sneakers. Keep the compact canvas bag light enough for the essentials you actually carry.
For a Softer Shape
The A-line midi creates movement without a print. Try the ribbed top tucked or lightly bloused, then sit and walk in the skirt before settling on your preferred waistband position. The quilted bag adds texture; the plain colors make it easy to wear with other clothes later.
For a Dressier Evening
Pair the red blazer with black separates and place the folded yellow square in its chest pocket. Smooth the lapels and check the shoulder fit; a narrow visible band of yellow is enough to make the red, black and yellow reference clear.