Argb-alpha,red,green,blue

Argb-alpha,red,green,blue
A color mode, which is the RGB color mode, attaches an alpha (transparency) channel, which is common in 32-bit bitmap storage structures.
Alpha, image channel, full strength ff, means no transparency, i.e. opaque, no strength of 00, indicates full transparency. Therefore, the transparent pixel color value is the alpha bit -00,red bit, green bit, blue bit is any value, for example: 0X00FFFFFF is transparent color, namely transparent.
If the graphics card has a 32-bit bus, the additional 8-bit signal is used to hold the invisible transparency signal for easy processing, which is the alpha channel. White alpha pixels are used to define opaque color pixels, while black alpha pixels are used to define transparent pixels, and gray levels between black and white define translucent pixels.

Color synthesis:
Set Alpha,red,green,blue are the number of 0~255 between
Color32 = Alpha << 24 | Red << 16 | Green << 8 | Blue

Color extraction:
Alpha = Color32 >> 24;
Red = Color32 >> & 0xFF;
Green = Color32 >> 8 & 0xFF;
Blue = Color32 & 0xFF;

Argb-alpha,red,green,blue