android studio buton rengi değiştirme, Form Yapımı

MainActivity Xml Code:

< ?xml version="1.0" encoding="utf-8"? >
< androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity" >

    < TextView
        android:id="@+id/textView"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="İş başvuru Formu"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintHorizontal_bias="0.511"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintVertical_bias="0.049" / >

    < Button
        android:id="@+id/button"
        android:layout_width="200dp"
        android:layout_height="100dp"
        android:text="Gönder"
        android:textStyle="bold"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="0.497"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/checkBox"
        app:layout_constraintVertical_bias="0.996" / >

    < EditText
        android:id="@+id/editTextTextPersonName"
        android:layout_width="match_parent"
        android:layout_height="71dp"
        android:layout_marginTop="48dp"
        android:background="#A7C4DC"
        android:ems="10"
        android:hint="Adınız"
        android:inputType="textPersonName"
        android:textColor="#EDEBEB"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/textView"
        app:layout_constraintVertical_bias="0.0"
        tools:layout_editor_absoluteX="16dp" / >

    < EditText
        android:id="@+id/editTextTextPersonName2"
        android:layout_width="409dp"
        android:layout_height="58dp"
        android:layout_marginTop="32dp"
        android:background="#A7C4DC"
        android:ems="10"
        android:hint="Soyadınız"
        android:inputType="textPersonName"
        android:textColor="#EDEBEB"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/editTextTextPersonName"
        app:layout_constraintVertical_bias="0.0"
        tools:layout_editor_absoluteX="0dp" / >

    < CheckBox
        android:id="@+id/checkBox"
        android:layout_width="match_parent"
        android:layout_height="125dp"
        android:layout_marginTop="12dp"
        android:background="#D59999"
        android:text="Şartları Kabul Ediyorum"
        android:textColor="#9A1111"
        android:textSize="20sp"
        android:textStyle="bold"
        app:layout_constraintTop_toBottomOf="@+id/radioGroup"
        tools:layout_editor_absoluteX="0dp" / >

    < RadioGroup
        android:id="@+id/radioGroup"
        android:layout_width="408dp"
        android:layout_height="196dp"
        android:layout_marginTop="20dp"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/editTextTextPersonName2">

        < RadioButton
            android:id="@+id/radioButton2"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Ehliyet Yok" / >

        < RadioButton
            android:id="@+id/radioButton"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginTop="88dp"
            android:text="Ehliyet Var" / >

    < /RadioGroup >

< /androidx.constraintlayout.widget.ConstraintLayout >

colors Xml

< ?xml version="1.0" encoding="utf-8"? >
< resources >
    < color name="purple_200">#FFBB86FC
    < color name="purple_500">#FF5722
    < color name="purple_700">#FF3700B3
     < color name="teal_200">#FF03DAC5
    < color name="teal_700">#FF018786
    < color name="black">#FF000000
    < color name="white">#FFFFFFFF
< /resources >

purple_500 rengini değiştirin