Mahapps.metro: Checkbox checkmark accent is hard to see against dark flyout

[Jehoel]

My WPF application using MahApps.Metro uses a Flyout for the app's Settings UI. Most of the users use the default "Light" theme with the "Blue" accent color. The Flyout is Modal="True" and configured with the defaults). Under these conditions checkboxes in the flyout have checkmarks that don't stand-out very well:

A quickfix is to change the checkmark brush to use a lighter shade of accent, if not white, when a checkbox is displayed in a flyout.

Environment

• MahApps.Metro v1.5.0
• Windows 10
• Visual Studio 2015
• .NET Framework 4.6.1

[punker76]

@Jehoel The CheckBox and RadioBox uses the HighlightBrush brush for the check mark and pressed status. You can override these in your Flyout resources like this

<Style TargetType="{x:Type CheckBox}"
        BasedOn="{StaticResource MetroCheckBox}">
    <Style.Resources>
        <SolidColorBrush x:Key="HighlightBrush" Color="{DynamicResource AccentColor}" />
    </Style.Resources>
</Style>

(or whatever color you need)

Hope this helps.

[punker76]

@Jehoel Do you need more help?

[Jehoel]

Sorry, I had my Github notifications turned off. I'll try this later tonight and let you know.

[Jehoel]

Using AccentColor is still too dark - and I noticed the other shades (e.g. AccentColorBrush4) are just differing opacity levels, so they're even harder to see on a black background.

I would like to reference the color used by the current FlyoutForegroundBrush, however that color is defined by StaticResource BlackColor (which is actually white) which I cannot directly access ({StaticResource BlackColor} gives me black).

How should I get white color if the flyout is dark, but a dark color if the flyout is white?

[punker76]

@Jehoel If you have a dark Flyout you need the WhiteColor or IdealForegroundColor and vice versa, for light Flyout the BlackColor.

<SolidColorBrush x:Key="HighlightBrush" Color="{DynamicResource WhiteColor}" />

<SolidColorBrush x:Key="HighlightBrush" Color="{DynamicResource IdealForegroundColor}" />

[Jehoel]

Perfect, thanks!