Colour contrast between foreground copy and background colours/textures/images must adhere to the standards recommended by the W3C.
To test colour contrast try services like: http://webaim.org/resources/contrastchecker/
DCC colour palette
The below are the primary colours in the Devon County Council brand.
Below are the secondary colours in the complementary palette, which can be used as accent colours in navigation, the rainbow header and footer strips and as large header text on a white background.
Gel, social media icons and Primary copy colour
Blue grey (the source)
While these are fixed, shades of the primary and secondary colours are permitted.