I contributed today's Square Root of Minus Garfield strip:
Like many other "funny" newspaper strips, the colour in Garfield seldom really adds value to the joke. It seems that colour is just added as an afterthought, because surely the newspapers did not invest in full-colour-on-every-page capable offset machines just to run monochrome line art!
However, for a strip that does not really need colour for its artistic message, we could put the colour process to better use, to wit, saving paper by printing three panels of line art in the space of one.
In this strip from 2004-04-16, the first panel is in cyan ink, the second in magenta and the third in yellow.