kmpdfkit_demo/compdfkit_demo_windows/compdfkit/compdfkit-tools/Asset/Theme/LightMode.xaml

<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
                    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
    <SolidColorBrush x:Key="color.bg.mainpage">#CECECE</SolidColorBrush>
    <SolidColorBrush x:Key="btn.bg.bota">#EFEFEF</SolidColorBrush>
    <SolidColorBrush x:Key="btn.logo.bota">#273C62</SolidColorBrush>
    <SolidColorBrush x:Key="color.border.normal">#BBBBBB</SolidColorBrush>
</ResourceDictionary>