The border of our panels lack contrast when using High Contrast mode. It should use the same color as the border of normal menu popups. See screenshots for comparison.

This is ThreeDShadow (i.e. a native color), isn't it?

I think we can make the border stronger by just replacing ThreeDShadow with ThreeDDarkShadow here: toolkit/themes/windows/global/arrow/panelarrow-vertical-themed.svg and in the --panel-arrowcontent-border variable here: toolkit/themes/windows/global/popup.css

I believe this is a widget bug. In high contrast mode, ThreeDShadow (used by arrow panels) provides less contrast than ThreeDLightShadow, which seems backwards.

(In reply to Dão Gottwald [:dao] from comment #4) > I believe this is a widget bug. In high contrast mode, ThreeDShadow (used by > arrow panels) provides less contrast than ThreeDLightShadow, which seems > backwards. ThreeDLightShadow returns COLOR_3DLIGHT ThreeDShadow returns COLOR_3DSHADOW http://searchfox.org/mozilla-central/rev/767e1e9b118269f957ca1817138472146278a29e/widget/windows/nsLookAndFeel.cpp#241 We can change the above easily if we need to. Standard win7 themes with glass: COLOR_3DLIGHT = light gray COLOR_3DSHADOW = dark gray High contrast, dark: COLOR_3DLIGHT = white COLOR_3DSHADOW = dark gray Maybe we need to chose a different css value here. MSDN describes the two as: COLOR_3DLIGHT (ThreeDLightShadow) - "Light color for three-dimensional display elements (for edges facing the light source.)" COLOR_3DSHADOW (ThreeDShadow) - "Shadow color for three-dimensional display elements (for edges facing away from the light source)."

(In reply to Jim Mathies [:jimm] from comment #5) > Maybe we need to chose a different css value here. MSDN describes the two as: > > COLOR_3DLIGHT (ThreeDLightShadow) - "Light color for three-dimensional > display elements (for edges facing the light source.)" > COLOR_3DSHADOW (ThreeDShadow) - "Shadow color for three-dimensional display > elements (for edges facing away from the light source)." You're right, we're abusing these colors, so that's why the contrasts are backwards with dark themes. This actually shows in many places using ThreeDShadow and ThreeDLightShadow where we expect ThreeDLightShadow to provide lower contrast and get the opposite effect in high contrast mode. I don't think there's any other color available for these kind borders. Maybe we could generate something ourselves based on the Window or -moz-dialog colors, or based on ThreeDShadow? If I remember correctly Gtk widget code already generates ThreeDLightShadow and ThreeDDarkShadow based on ThreeDShadow rather than getting them directly from the OS.

Moving to p3 because no activity for at least 1 year(s). See https://github.com/mozilla/bug-handling/blob/master/policy/triage-bugzilla.md#how-do-you-triage for more information

Moving to p3 because no activity for at least 1 year(s). See https://github.com/mozilla/bug-handling/blob/master/policy/triage-bugzilla.md#how-do-you-triage for more information

Pushed by dgottwald@mozilla.com: https://hg.mozilla.org/integration/autoland/rev/c3c18577116e Increase contrast of the arrow panel border in High Contrast mode. r=Itiel