-r switch - you'll be able to see the colors properly (or just imagine them), as it will interpret the escapes "properly".
-r or --raw-control-chars
Causes "raw" control characters to be displayed. The default is to display control characters using the caret notation; for example,
a control-A (octal 001) is displayed as "^A". Warning: when the -r option is used, less cannot keep track of the actual appearance of
the screen (since this depends on how the screen responds to each type of control character). Thus, various display problems may
result, such as long lines being split in the wrong place.
-R or --RAW-CONTROL-CHARS
Like -r, but only ANSI "color" escape sequences are output in "raw" form. Unlike -r, the screen appearance is maintained correctly in
most cases. ANSI "color" escape sequences are sequences of the form:
ESC [ ... m
where the "..." is zero or more color specification characters For the purpose of keeping track of screen appearance, ANSI color
escape sequences are assumed to not move the cursor. You can make less think that characters other than "m" can end ANSI color escape
sequences by setting the environment variable LESSANSIENDCHARS to the list of characters which can end a color escape sequence. And
you can make less think that characters other than the standard ones may appear between the ESC and the m by setting the environment
variable LESSANSIMIDCHARS to the list of characters which can appear.