prefers reduced motion reduce rendered text color automatically bright legible text color based background invert negative textual theme

prefers reduced motion reduce rendered
text color automatically bright legible text color based background
invert negative textual theme

https://codepen.io/WebSeed/pen/pvgqEq
algorithm - Determine font color based on background color - Stack Overflow
user interface - Given a background color, how to get a foreground color that makes it readable on that background color? - Stack Overflow

textual theme document theme structure and appearance of text
document theme structure template
templates  themes style

Prefers Reduced Motion Accessible Animations  prefers-reduced-motion
https://developer.mozilla.org/zh-CN/docs/Web/CSS/@media/prefers-reduced-motion

https://sparkbox.com/foundry/prefers_reduced_motion_media_query_CSS_rule_for_WCAG_accessibility
Reduced Motion Queries
https://webflow.com/blog/motion-and-accessibility