Which colour is formed when more yellow is added to orange?

Correct answer: Yellow-orange

The governing concept is hue proportion. Orange is produced from red and yellow; increasing the yellow component moves the mixture toward yellow and forms yellow-orange. Option A is correct. Red-orange would be obtained by adding more red to orange, while blue-green and red-violet use different colour pairs. On a traditional colour wheel, these intermediate hues are classified as tertiary colours because they lie between a primary and a neighbouring secondary colour.