<?xml version="1.0" encoding="utf-8"?>
<resources>

    <color name="primary_color">#0288D1</color>
    <color name="primary_dark_color">#01579B</color>
    <color name="accent_color">#7986CB</color>

    <color name="text_color">#444</color>
    <color name="text_title_color">#FFF</color>
    <color name="text_primary_color">#444</color>
    <color name="text_secondary_color">#999</color>

    <color name="practice_color">#76FF03</color>
    <color name="lecture_color">#03A9F4</color>
    <color name="laboratory_color">#F44336</color>
    <color name="unknown_color">#9E9E9E</color>

</resources>
<?xml version="1.0" encoding="utf-8"?>
<resources>

    <color name="primary_color">#0288D1</color>
    <color name="primary_dark_color">#01579B</color>
    <color name="accent_color">#7986CB</color>

    <color name="text_color">#A000</color>
    <color name="text_title_color">#FFF</color>
    <color name="text_primary_color">#A000</color>
    <color name="text_secondary_color">#6000</color>

    <color name="practice_color">#76FF03</color>
    <color name="lecture_color">#03A9F4</color>
    <color name="laboratory_color">#F44336</color>
    <color name="unknown_color">#9E9E9E</color>

</resources>
Use alpha instead of shades of gray for text color
Use alpha instead of shades of gray for text color
