android studio UIはmaterial paletteで色を設定します。

色の設定サイト:http://www.materialpalette.com/blue/deep-orange 
colors.xml：

xml version="1.0" encoding="utf-8"?>
<resources>
    <color name="colorPrimary">#2196F3color>
    <color name="colorPrimaryDark">#1976D2color>
    <color name="colorPrimaryLight">#BBDEFBcolor>
    <color name="colorAccent">#FF5722color>
    <color name="colorHighlight">#FFFFFFcolor>
    <color name="colorPrimaryText">#212121color>
    <color name="colorSecondaryText">#757575color>
    <color name="colorDivider">#BDBDBDcolor>
resources>

style.xml：

<style name="AppTheme" parent="Theme.AppCompat.Light.NoActionBar">
    
    <item name="colorPrimary">@color/colorPrimaryitem>
    <item name="colorPrimaryDark">@color/colorPrimaryDarkitem>
    <item name="colorAccent">@color/colorAccentitem>
    <item name="android:colorControlHighlight">@color/colorHighlightitem>
    <item name="android:windowBackground">@android:color/whiteitem>
style>