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Make it more likely that we pick a dark contrast color from RiaColorTools

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This commit is contained in:
Gaute Lindkvist 2019-01-07 10:55:01 +01:00
parent 7a275be335
commit 1c780deeab
1 changed files with 2 additions and 1 deletions
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3
ApplicationCode/Application/Tools/RiaColorTools.cpp
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@ -28,10 +28,11 @@
/// Uses W3.org relative luminance calculation taking into account the different luminance of the different colors /// Uses W3.org relative luminance calculation taking into account the different luminance of the different colors
/// https://www.w3.org/TR/WCAG20-TECHS/G18.html /// https://www.w3.org/TR/WCAG20-TECHS/G18.html
/// Luminance is between [0, 1] so anything above 0.5 is considered in the bright half of the spectrum. /// Luminance is between [0, 1] so anything above 0.5 is considered in the bright half of the spectrum.
/// However, subjectively the contrast looks better if the threshold is to 0.4 so black contrast is used a bit more often.
//-------------------------------------------------------------------------------------------------- //--------------------------------------------------------------------------------------------------
bool RiaColorTools::isBrightnessAboveThreshold(cvf::Color3f backgroundColor) bool RiaColorTools::isBrightnessAboveThreshold(cvf::Color3f backgroundColor)
{ {
if (relativeLuminance(backgroundColor) > 0.5) if (relativeLuminance(backgroundColor) > 0.4)
{ {
return true; return true;
} }