It is now possible to add color in time displayed for each line in formated buffers.
Option weechat.look.buffertimeformat now supports colors with format: "${xxx}" where "xxx" is a color name (lightblue, red, ...) or a number (for example: "214" for orange).
Note: updated in 0.4.2, the syntax is now: "${color:xxx}".
Screenshot of colored time, with french flag colors:
