Is there and easy way to change the colours on contribution pages, the background shouldn't be blue?
Also the buttons are all white with white text till you wave your courser over them.
Is there a simple way I'm missing that doesn't require any knowledge of code?
In Drupal you could add a new theme, for example 'Bootstrap', and add the module 'Themekey' to Drupal. Then in Themekey settings you can specify the Bootstrap theme to be used for a particular page. For example in the Themekey settings when 'drupal.node' = 'civicrm/something' then theme is 'Bootstrap'. No coding required!
