All but one of the pictures here are FAKE and generated from a computer algorithm to recolor the original insulator.

The color of one of these insulators was generated with a simple transformation. Going from left to right, the hue is changed to all the colors in the color wheel. Bigger jumps here but they all are present. Bottom to top, the saturation of the insulator changes. The colors get less intense until all the color is gone and you end up with gray.

So, for your pastel shades, just match it up to this chart and you have the color! Sorry, it isn't bigger. View Original will help some.