AnsiEsc can not show background

Hi,

The following code shows that vim can not show background color correctly form Ansi Color. Is there a command to enable background color? Thanks.

~/linux/test/python/man/library/termcolor/colored/on_red$ cat main.py
#!/usr/bin/env python

from termcolor import colored
print colored('hello', 'white', 'on_red'), colored('world', 'white', 'on_green')

~/linux/test/python/man/library/termcolor/colored/on_red$ type less
less is aliased to `vim -R -c AnsiEsc -'
~/linux/test/python/man/library/termcolor/colored/on_red$ ./main.py |less

Regards,
Peng

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