These are the current versions of the Straight Shades.
The example on the left shows the original color wrap, where the colors are added by wrapping them like soft taffy around the main piece of glass over a solid opaque layer of color. Applying the color this way creates a sweeping, blending movement of color, augmented by the opaque background color.
To the right, the sample shade shows our more recent color wrap v2.0. The main colors are still applied as a wrap, but the solid opaque background color is eliminated. It sounds like a minor change, but it results in some interesting differences.