There's really not much point to this comparison unless you do so. Since colour is merely reflected light, unless the lighting is the same for all four shots it's a waste of time.
My original shots were not to compare the four lenses. One pair of shots was to compare Canon vs. Tamron, the other pair were to compare L vs non-L Canon. I have reshot all lenses, and added a fifth one to the series. In the shots you can see a bit of fence behind the MacBeth card, so that you have a real world object to see if subtle color is more apparent in better color reproduction via the L.
Here is the process I followed...I shot all lenses per gray card reading (all shot at 1/320 f/4), as rapidly as possible to keep light conditions as identical as possible. I read the RAW files into Lightroom, I put LF into grayscale mode to establish identical density of the 18% gray patch on the MacBeth card and then reverted to color mode. One of the shots (it obvious which one) is warmer than the others, so I took that shot and neutralized it in color balance with the post processing WB tool and added it to the series to see if people could figure out which shot is the WB corrected shot vs what comes out of all the lenses.
The lenses to match Number (photo) to Letter (lens):
A. Canon 70-200 f/4L (to see if you can identify the L)
B. Tamron 28-75 f/2.8 (to see if you can identify the Tamron)
C. Canon 100 f/2 (to see if you can identify the prime)
D. Canon 17-55 f/2.8 (to see if you can identify the non-L zoom)
E. (the neutralized post processing)