In the viewport, semi-transparent strokes could appear more yellowish. This was because the `reveal_tx` uses the `GPU_R11F_G11F_B10F` format (loosing precision in the blue channel). Now using `GPU_RGB10_A2` for `reveal_tx` to fix the issue. We don't need to change the format for the `color_tx`. Pull Request: https://projects.blender.org/blender/blender/pulls/141335