D7424: Very slightly increase text contrast for the default Breeze color scheme

[Nathaniel Graham]

ngraham added a reviewer: VDG.

REPOSITORY
  R31 Breeze

REVISION DETAIL
  https://phabricator.kde.org/D7424

To: ngraham, hpereiradacosta, jensreuterberg, jriddell, kvermette, #vdg
Cc: sebas, plasma-devel, ZrenBot, progwolff, lesliezhai, ali-mohamed, 
jensreuterberg, abetts, apol, mart, lukas