Color constrast helpers to achieve the WCAG 2.0 standard
npm install wcag-color

According to the WHO an estimated 1.3 billion
people live with some form of visual impairment. This includes people who are legally blind and people with less than 20/20 vision.
This library helps you achieve the accessibility standards for color contrast outlined in the WCAG 2.0 specification.
```
npm install wcag-color
ratio takes two colors, a foreground color, and background color, and returns a contrast ratio. ratio accepts most color formats:
- HEX - normal (#0088ff), shorthand (#08f) and without hash (08f)rgb(255, 255, 255)
- RGB - hsl(210, 100%, 40%)
- HSL -
`js`
ratio(foreground: string, background: string) => number
#### Example
`js
import { ratio } from 'wcag-color'
ratio('hsl(210, 100%, 40%)', '#ffffff') // 5.57
`
score takes two colors and returns a score value. Read more below.
`js`
score(foreground: string, background: string) => 'Fail' | 'AA Large' | 'AA' | 'AAA'
#### Example
`js
import { score } from 'wcag-color'
score('hsl(210, 100%, 40%)', '#ffffff') // AA
`
scoreFromRatio takes a ratio and returns a score value.
`js`
scoreFromRatio(ratio: number) => 'Fail' | 'AA Large' | 'AA' | 'AAA'
#### Example
`js
import { scoreFromRatio } from 'wcag-color'
scoreFromRatio(7.5) // AAA
`
best takes two colors and a background color and returns the color which is
best suited, from a contrast perspective, for that background color.
`js`
best(firstColor: string, secondColor: string, background: string) => string
#### Example
`js
import { best } from 'wcag-color'
best('#ffffff', '#000000', '#ffffff') // #000000
`
- Fail - Your text has a contrast ratio of less than 3.03.0
- AA Large - Least amount of contrast for font size 18px and larger. The ratio is above .4.5
- AA - What you should aim for with text sizes below 18px. The ratio is at least .7.0`. Valuable for texts that will be read for a longer period of time.
- AAA - Enhanced contrast with a ratio of at least