High Contrast Test Page
765
Text:#000 / Background:#fff
Brightness difference = 255
Colour difference = 765
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Italic text
717
Text:#101010 / Background:#fff
Brightness difference = 229
Colour difference = 717
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669
Text:#202020 / Background:#fff
Brightness difference = 223
Colour difference = 669
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621
Text:#303030 / Background:#fff
Brightness difference = 207
Colour difference = 621
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Italic text
573
Text:#404040 / Background:#fff
Brightness difference = 191
Colour difference = 573
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Italic text
525
Text:#505050 / Background:#fff
Brightness difference = 175
Colour difference = 525
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