Colour Modes - PNG File typeColour data mode - Bits per pixel PNG (Portable Network Graphic), pronounced 'Ping' RGB - 24 or 48 bits, Grayscale - 8 or 16 bits, Indexed color - 1 to 8 bits, Line Art (bilevel compression) - 1 bit PNG uses ZIP compression which is lossless, and slightly more effective than LZW (slightly smaller files).
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