Colour contrast between text and background is important on web pages. It affects some people’s ability to perceive the information (in other words to be able to receive the information visually).
Accessibility
Colour Contrast - Why Does It Matter? — GOV.UK
Knowledge
Creating Usability with Motion: The UX in Motion Manifesto
The following manifesto represents my answer to the question - "As a UX or UI, designer, how do I know when and where to implement motion to support usability?"
Microinteractions
Creating Usability with Motion: The UX in Motion Manifesto