progwolff added a comment.
The W3C recommendation you referenced has an online tool to check specific colors: http://juicystudio.com/services/luminositycontrastratio.php#specify Current breeze colors give > Passed at Level AAA: The luminosity contrast ratio is very good for the chosen colours (#fcfcfc and #31363b). There are also studies that warn against using too high contrast in text. For example https://www.researchgate.net/profile/Ricardo_Baeza-Yates/publication/239761586_Layout_guidelines_for_web_text_and_a_web_service_to_improve_accessibility_for_dyslexics/links/02e7e53313bbc5c9bc000000.pdf > The most favorited color pair chosen by our participants > (yellow/black) has the highest contrast color combination, > which is not consistent with [4], that recommends to avoid > high contrast. Moreover, according to [33] such high con- > trast creates so much vibration that it diminishes readabil- > ity. Our explanation is that this pair was chosen because > it is the one that has the highest contrast so it seems more > readable at first sight although eye tracker data showed that > it was actually the hardest contrast to read. REPOSITORY R31 Breeze REVISION DETAIL https://phabricator.kde.org/D7424 To: ngraham, hpereiradacosta, jensreuterberg, jriddell, kvermette, #vdg Cc: progwolff, broulik, sebas, plasma-devel, ZrenBot, lesliezhai, ali-mohamed, jensreuterberg, abetts, apol, mart