These are a variation, but not for the yellow being pale - that's simply a printing flaw.
Cards 18, 29, 45, & 117 had the same thing with the Green and Yellow in the letters (I think there were others as well already documented, those were just the first few I found to use as examples). Surprised we didn't have this variation in there yet!
I added the card here:
https://www.tradingcarddb.com/ViewCard.cfm/sid/72/cid/11534279/1972-Topps-534-Jim-Hickman?PageIndex=1
But we need to unlock the ste so I can add the a/b to the numbers and the info to the card that was already there.
-- Dan --
Note: Please see my profile for more info regarding trading (section updated 3/4/2024). I have added a large portion of my inventory to the site, and currently have trading turned on (details are in my profile).