Android button background is taking the primary color

Since you are using a Theme.MaterialComponents.* your Button is replaced at runtime by a MaterialButton.

Currently the backgroundTint is still the default MaterialButton style.It means that if you are using a custom android:background, you have to make sure to null out backgroundTint to avoid that the custom background doesn't get tinted with the attr/colorPrimary defined in your theme.

You have to add app:backgroundTint="@null":

  <Button    app:backgroundTint="@null"    android:background="@drawable/.."

In any case you don't need a custom background (btn_rounded_stroke) in your case. You are just using a custom background only to define rounded corners. This feature is provided by default by the MaterialButton, then just use the cornerRadius attribute.

Use the standard MaterialButton:

    <com.google.android.material.button.MaterialButton        android:layout_width="wrap_content"        android:layout_height="48dp"        style="@style/Widget.MaterialComponents.Button.OutlinedButton"        app:strokeColor="#59CECE"        app:cornerRadius="24dp"

When Material theme is used then Button view is mapped to MaterialButtton.There is one more way to setup the button background in this case.

    <style name="AppTheme" parent="Theme.MaterialComponents.DayNight.DarkActionBar"...        <item name="materialButtonStyle">@style/ColoredButton</item>    </style>    <style name="ColoredButton" parent="Widget.MaterialComponents.Button.TextButton">        <item name="backgroundTint">@color/customButtonColor</item>    </style>

Try this .

Your Button:

<Button    android:layout_width="wrap_content"    android:layout_height="wrap_content"    android:textColor="#FFFFFF"    android:layout_margin="5dp"    android:background="@drawable/round_btn"    android:padding="20dp"    android:text="My Text" />

Here is your round_btn drawable:

<shape xmlns:android="http://schemas.android.com/apk/res/android"    android:shape="rectangle">    <solid android:color="#008577" />    <corners android:radius="20dp" /></shape>