Question: I am fallowing a tutorial and have an error on `color` saying "color can not be resolved or is not a field". Anyone know the reason for this. Thanks.

```
lv.setBackgroundColor(callerActivity.getResources().getColor(R.color.Twitter_blue));

```

Answer: 
You need to open "colors.xml" file under the "values" folder and add the color:

```
 <color name="Twitter_blue">#FF4081</color>

```

with the relevant colour hex number.
`Twitter_blue` apparently is not a field in `R.color` have you tried just using `R.color.blue` or something similar?