util: support background color
util: support background color

Former-commit-id: 93f0e8becedb119a013bc7ad3bebe81b849d58ec
Former-commit-id: 39a40037b26742dc9bd275c03934a85fce61b00e
torhve/ivar2,haste/ivar2,torhve/ivar2,torhve/ivar2