[gtk: 4/4] Merge branch 'css-crossfade-color' into 'master'

[Matthias Clasen <matthiasc src gnome org>]

commit 30043e072eb356112de4c8642401cbf185fda921
Merge: ec9159f983 5ee7606779
Author: Matthias Clasen <mclasen redhat com>
Date:   Wed Jan 27 03:11:17 2021 +0000

    Merge branch 'css-crossfade-color' into 'master'
    
    Css crossfade color
    
    See merge request GNOME/gtk!3122

 docs/reference/gtk/css-properties.md |  8 ++++----
 gtk/gtkcssimagecrossfade.c           | 20 +++++++++++++++++---
 gtk/gtkcssimagefallback.c            | 21 ++++++++++++++++-----
 gtk/gtkcssimagefallbackprivate.h     |  4 +++-
 4 files changed, 40 insertions(+), 13 deletions(-)
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