我在Android工作室给出背景错误，给出了值android：background =“11000000”我的终端错误发布在下面

Question

/Users/adityamnaik/AndroidStudioProjects/Alvas/app/build/generated/not_namespaced_r_class_sources/debug/processDebugResources/r\
        --custom-package\
        com.example.adityamnaik.alvas\
        -0\
        apk\
        --preferred-density\
        560dpi\
        --output-text-symbols\
        /Users/adityamnaik/AndroidStudioProjects/Alvas/app/build/intermediates/symbols/debug/R.txt\
        --no-version-vectors

Output:  /Users/adityamnaik/AndroidStudioProjects/Alvas/app/src/main/res/layout/activity_main.xml:11: error: '11000000' is incompatible with attribute android:background (attr) reference|color.
/Users/adityamnaik/AndroidStudioProjects/Alvas/app/src/main/res/layout/activity_main.xml:26: error: '11000000' is incompatible with attribute android:background (attr) reference|color.
error: failed linking file resources.