This also affects Light Blue Dye item ( MC-264445 ).

Stained Glass and Stained Glass Panes still use the old colors prior to 1.12. In 1.12 the color codes for dyes were changed, but stained glass and stained glass panes are still using the pre 1.11 color codes instead of the new colors.

What I expected to see: Stained Glass and Stained Glass Pane use the new colors in 1.12 and 1.20.1:

What is seen instead: Stained Glass and Stained Glass Pane use the old colors from pre 1.11 update.

At the top, Java v1.11.2 to Java 1.20.1 bottom. This also affects bedrock edition in all.

Areas of note, compare the same in both pictures above.

Color changes in 1.12 were noted.

Opened Yellow Glass Pane and Yellow Wool, difference in hue and saturation is noticable. In 1.11.2 and below, the colors matched. Now since 1.12, the colors are wrong, even in 1.20. Light Blue Glass Pane is also serious.