multiplication. Used, among others, in the MSX2 system series of computers in the early to mid 1990s. a 6×7×6 cube, leaving 4 colors for a programmable palette or grays. a 6×8×5 cube, leaving 16 colors for a programmable palette or grays. 9-bit color 512 colors, generated using 3 bits for each of the red, green, and blue color components. 12-bit color 4096 colors, usually from a fully-programmable palette (though it was often set to a 16×16×16 color cube). Some Silicon Graphics systems, Color NeXTstation systems, and Amiga systems in HAM mode have this color depth. RGBA4444, a related 16bpp representation providing the color cube and 16 levels of transparency, is a common texture format in mobile graphics. High color (15/16-bit) In high-color systems, two bytes (16 bits) are stored for each pixel. Most often, each component (R, G, and B) is assigned 5 bits, plus one unused bit (or used for a mask channel or to switch to indexed color); this allows 32,768 colors to be represented. However, an alternate assignment which reassigns the unused bit to the G channel allows 65,536 colors to be represented, but without transparency. These color depths are sometimes used in small devices with a color display, such as mobile phones, and are sometimes considered sufficient to display photographic images. Occasionally 4 bits per color are used plus 4 bits for alpha, giving 4096 colors. Among the first hardware to use the standard were the Sharp X68000 and IBM's Extended Graphics Array (XGA). The term "high color" has recently been used to mean color depths greater than 24 bits. 18-bit Almost all of the least expensive LCDs (such as typical twisted nematic types) provide 18-bit color (64×64×64 = 262,144 combinations) to achieve faster color transition times, and use either dithering or frame rate control to approximate 24-bit-per-pixel true color, or throw away 6 bits of color information entirely. More expensive LCDs (typically IPS) can display 24-bit color depth or greater. True color (24-bit) 24 bits almost always use 8 bits each of R, G, and B (8 bpc). As of 2018, 24-bit color depth is used by virtually every computer and phone display and the vast majority of image storage formats. Almost all cases of 32 bits per pixel assigns 24 bits to the color, and the remaining 8 are the alpha channel or unused. 224 gives 16,777,216 color variations. The human eye can discriminate