Submodule 15.2: The RGBAs of image: RGBA color model

Submodule 15.2: The RGBAs of image

View

RGB model
RGBA model
Bitmap data

RGBA color model

Color and opacity - transparency

RGBA is an extension of RGB color values with an alpha channel - which specifies the opacity of the object. An RGBA color value is specified with: rgba(red, green, blue, alpha). 0 is transparent and 255 is completely opaque.

jpg does not support transparency.

http://www.cssportal.com/css3-rgba-generator/