couldn't be able to set color from colors.xml file

in order to keep all the colors in one place i copied all my colors in a colors.xml file,

<resources>

    <color name="footerColor">#FF607675</color>
    <color name="activityBackground">#FFB7D4E1</color>
    <color name="listView1">#FFB7D3E1</color>
    <color name="listView2">#FFC5DCE7</color>
    <color name="title">#AA4C4E44</color>
    <color name="subTitle">#FF013C3B</color>

</resources>

but when I am setting this color in my .java file then they are not working,

like this,

date.setTextColor(color.subTitle);

but If i am hard coding the color then it is working,

date.setTextColor(0xFF013C3B);

I have also tried providing the complete path to my Resources file like this, but this doesn't work either

date.setTextColor(com.news.testapp.R.color.subTitle)

It is not showing error or anything but it doesn't work either. What am I doing wrong ?