I like your color choice. I goggled and found a sample of the yellow and red combo,
https://www.google.com/search?biw=12..._5wHV1hj7mkOM:
The addition of a strong blue really makes the block pop,
https://www.google.com/search?biw=12...yXa7X35KDTpBM:
I know neither picture has white in it.