Steel Slate reads composed and technical without becoming stark. Pair it with pale gray for a crisp UI direction or with warm sand to make its blue note more visible.

Tints
#6b7c85
#7a8991
#89969d
#97a3aa
#a6b0b6
#b5bec2
#c4cbce
#d3d8da
#e1e5e7
#f0f2f3
#ffffff
Shadows
#6b7c85
#607078
#56636a
#4b575d
#404a50
#363e42
#2b3235
#202528
#15191b
#0b0c0d