Attached are three images of vanilla 1.11.2, 1.12 and 21w05b. Note how the light blue dye item most closely matches the 1.11.2 light blue wool - it still retains this color in 1.12 and even after the Texture Update, which is obviously misleading. Dye items should be retextured again to correct this.
While light blue is the most obvious example, I'd recommend redoing all 16 colors to get rid of more subtle inconsistencies that exist for other colors.
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Can confirm in 21w06a.
Can confirm in 21w07a.
Can confirm in 21w08b.
Can confirm in 21w11a.
Can confirm in 21w13a.
Can confirm in 21w16a.
Can confirm in 1.17.
Can confirm in 1.17.1.

Can confirm in 21w38a.

Can confirm in 21w39a.
Can confirm this in both 1.17.1 and 21w44a. Here's a side-by-side comparison of the dye color scheme before and after the texture update.
[media]Can confirm in 1.18pre-6
Can confirm in 1.18.
Can confirm in 1.18.1.
Can confirm in 1.18.2.

In 1.19 Pre-1.
Can confirm in 1.19 and 22w24a.
Can confirm in 1.19.2.

In 1.20 Pre-Release 1.
Preposed fix:
[media]
In game:
[media]
Can confirm.
Note: At least for me the images are in reverse order. 21w05b, 1.12, and 1.11.2.