The first one is a poster I collect in past years, it used Red warm, red orange, and orange to contract with blue, blue green, and use black as the background color to stabilize the contrast.
Second is the album cover of Ivoryline, which use red warm, red, orange to contract with blue, blue green and green for a strong image impact.
The background used very light orange to smooth visual impact.
Next is and typography design on the magazine, it used light orange and light blue to highlight the note, and use orange and dark orange to push the contrast further more.
Last is a book cover, which use orange and red orange as the dominant color, and put in blue and blue green to single out the illustration.
Casper's 
