To use these colors explicit background color classes are provided. Check out the background utilities
Primary
#805AD5
Primary 600
#6B46C1
Secondary
#A0AEC0
Secondary 600
#4A5568
Black
#282828
White
#FFF
Lynx White
#F7F7F7
Success
#52C41A
Success 600
#389E0D
Warning
#ffec3d
Warning 600
#fadb14
Danger
#FF4D4F
Danger 600
#f5222d
Info
#91d5ff
Info 600
#40a9ff