color tests

Use of color as the default method to visually indicate optimum values for the meter element.

Red indicates sub-sub optimum

High

green indicates optimum

Optimum

Orange indicates sub-optimum

Low

Note: static progress elements have been used in place of meter for color testing as it is better supported.

Screen shot of a protonopia simulation of the elements above.
For people with Protonopia the first (red indicating sub-sub optimum) and second (green indicating optimum) bars are indistinguishable.

The Protonopia simulation was created using the Color Contrast Analyser