Support light background colors with dark text?

[Siilwyn]

Could support badges that have dark text on a light background using these colors:
https://github.com/badges/shields/blob/4415d07e8b5bf794e6675cea052cc644d0c81bb5/badge-maker/lib/badge-renderers.js#L19

Detection of the color brightness from a hex value can be retrieved with:
https://github.com/bubble-dev/_/tree/master/packages/fantasy-color/from-hex and https://github.com/bubble-dev/_/tree/master/packages/fantasy-color/luminance-srgb