APCA Script Test

Usage:

First color must be text, second color must be the background.

APCAcontrast() requires Ys (display luminance)
sRGBtoY() requires an sRGB color array 0-255
displayP3toY() requires a displayP3 RGB color array 0.0-1.0
adobeRGBtoY() requires an Adobe98 RGB color array 0-255
colorParsley() parses string to an RGB color array 0-255
alphaBlend() blends FG color with alpha to BG, returns array
calcAPCA(textString,bgString) shortcut, takes strings, text allows alpha
fontLookupAPCA(contrast)returns an array of font sizes in px for the contrast
returnArray reference: ['LcValue',100,200,300,400,500,600,700,800,900]

TESTING YOUR IMPLEMENTATION

If you've implemented the code and want a quick sanity check, Here are some keystone checks with no rounding. The first color is TEXT and the second color is BACKGROUND:

Test Values for the 0.1.0 G constants, normal and reverse float values for each color pair.

First number is TEXT second number is BACKGROUND.

TEXT vs BKGND • EXPECTED RESULT for 0.1.1

    #888 vs #fff  •  63.056469930209424
    #fff vs #888  • -68.54146436644962  

    #000 vs #aaa  •  58.146262578561334
    #aaa vs #000  • -56.24113336839742
    
    #123 vs #def  •  91.66830811481631
    #def vs #123  • -93.06770049484275

    #123 vs #444  •   8.32326136957393
    #234 vs #444  •  -7.526878460278154