A test suite for testing color contrast in accordance with WCAG guidelines.
11 is designed for
400 weight text in any size, and guaranteed to work well on a step
3 background. Each test should pass 4.5:1 contrast ratio.
9 step is designed for solid backgrounds, and guaranteed to work well behind white text in
600 weight at 19px. Each test should pass 3:1 contrast ratio.
These bright scales are designed for black foreground text.