1. Color Web Design Professor Frank

2. Color Displays Based on cathode ray tubes (CRTs) or back- lighted flat-screen Monitors transmit light - displays use the red- green-blue (RGB) additive color model

3. Color Displays

4. Pixels Display screen = grid of x and y coordinates Each box = 1 pixel Pixel = picture element

5. Pixels and Color Depth Video RAM/VRAM – OS memory dedicated to screen display 1 single bit of memory per pixel

6. Black & White Display

7. 8 Bit / 256 Color Display More memory/pixel = more colors to display 8bits of memory/pixel = 256 colors

8. “True Color” True color – 24 bits memory per pixel (8 red, 8 green, 8 blue)

9. Color Depth & Graphics Files 8-bit, or 256-color, image files (uncompressed) dedicate 8 bits to each color pixel in the image In 8-bit images the 256 colors that make up the image are stored in an array called a "palette" or an "index"

10. True Color / 24 Bit Images

11. Color Terminology Hue - wavelength of color along the spectrum of visible light, ie “yellow,” “orange,” or “red.” Saturation - the intensity of a color Brightness - The lightness or darkness of a color or how close to either black or white a given color is.

12. Color Terminology