| The lightfastness ratings included in this chart are represented by the following symbols: |
For determining Opacity and Transparency Ratings, a four-point scale is used to indicate the relative opacity or transparency of that color: |
| Best Lightfastness and Permanency |
5 = Wool Scale 8 |
Totally Opaque |
= TO |
| Very Good Lightfastness and Permanency |
4 = Wool Scale 7 |
Semi-Opaque |
= SO |
| Good Lightfastness and Permanency |
3 = Wool Scale 5-6 |
Semi-Transparent |
= ST |
| Satisfactory Lightfastness and Permanency |
2 = Wool Scale 3.5-5 |
Totally Transparent |
= TT |
| Adequate Lightfastness and Permanency |
1 = Wool Scale 3-3.5 |
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