Using color-mix() to create opacity variants

Build an alpha color system without splitting out channels using this one neat trick.

Color Theory, How to Use the Color Wheel for Your Designs

background-color + opacity vs. sass mix() function

Composition based on Plexus. Use different methods of overlaying (mixing). Animation through transparency of different color variants from this collection will create amazing new compositions. Stock Photo

Android color for mobile design, Mobile

background-color CSS-Tricks - CSS-Tricks

Color Theory 101: A Complete Guide to Color Wheels & Color Schemes

Add Opacity to an Existing Color – Chris Coyier

Color Theory 101: A Complete Guide to Color Wheels & Color Schemes

image processing - Blending transparent colors - Stack Overflow

Help Online - Origin Help - Customizing Data Plot Colors