A fun and engaging Colour Theory worksheet that introduces students to complementary (opposite) colours through a creative monster design challenge. Students choose a complementary colour pair and use it to create a bold monster character, exploring colour contrast, colour relationships and visual impact. Perfect for KS2, KS3, cover lessons, non-specialist teachers, homework and colour theory units. Includes complementary colour guides, colour wheel reference, step-by-step instructions, artist tips and reflection tasks.