If the AllowGlyphSkinning property equals false, item glyphs are painted as they are and item foreground colors will be used to paint these items' BarItem.Captions only. In other cases, item glyphs gain a hue, dependent on the fore color of these items.
For the best visual result, we recommend using grayscale icons from our DevExpress Image Gallery.

The BarItem.AllowGlyphSkinning property overrides global glyph skinning settings for individual bar items.
See the Bar and Ribbon Glyph Skinning topic to learn more.