Currently, BGAN #6450 has the background trait: SOLID AF
This is an interesting background to study as it is definitely slowly changing colors from left to right and from top to bottom. It's pretty awesome. Not Solid AF.
https://opensea.io/assets/ethereum/0x31385d3520bced94f77aae104b406994d8f2168c/6450
Trait Constitution :
1.4.2 GRADIENT
It moves from a lighter shade of red to a darker shad of red from the right moving to the left. But also and especially moving down to the left corner where it becomes very pronounced. The transition is gradual as there is no particular line where the color just changes. It is gradually transitioning color throughout the image background.
I am attaching some images as follows:
1st Image is an enlargement of the very top right of the background on the right and then the top left of the background on the left side. I sniped about 4 pixels on each side at the very top and then enlarged them. Then I overlayed them for contrast.
2nd Image is the top 4 pixels approximately on the top right of the image background on the right side and then the bottom left 4 pixels from the image background on the left side. Enlarged and overlayed for contrast.
The second image shows how pronounced the different shade of red becomes as we move down to the lower left of the image background.