# system.kanoa.utilities.getContrastingColor(colorString)

Takes a string in either the form of RGB hex digits with hash sign (i.e. #FFFFFF') or a CSS custom variable (i.e '--KcBlue-60')
to compute a complementary contrasting color such as for fonts against a background

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### Parameters
**colorString** `String`: RGB hex digits or a Kanoa CSS custom variable<br />

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### Returns
**hexColor** `String`<br />

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### Example
```python
print system.kanoa.utilities.getContrastingColor('#FF0000')
>>>
#FFFFFF
print system.kanoa.utilities.getContrastingColor('--kcBlue-10')
>>> 
#000000
```