In Web graphics terms, color mode refers to the number of colors or grays that appear in an image. Common modes include
- Grayscale: 256 different gray levels
- Indexed Color: 256 or fewer colors
- RGB: 16.7 million different colors created from red, green, and blue values
Unfortunately, CMYK (approximately 55,000 printable colors created from cyan, magenta, yellow, and black values) is not an option for Web display.
In practical terms, only Grayscale, Indexed Color, and RGB are used for the Web because they’re the only modes supported by the two most popular Web-capable image file formats, GIF and JPEG (described later in this chapter). (Actually, JPEG does support CMYK color, but it must be converted back to RGB for display in a browser, so the option is of little value.) The color mode you choose affects how your image is displayed. Modes of 256 (or fewer) colors are great for images that contain a limited number of hues, but not for the display of images that call for full color. But if you use RGB color mode with full-color images, they frequently (but not always) produce larger files that take a long time to download. For reasons like these, you have to make tradeoffs when selecting the right mode. Fortunately, the Save for Web feature enables you to compare the different modes and make a wise decision.
- Grayscale: 256 different gray levels
- Indexed Color: 256 or fewer colors
- RGB: 16.7 million different colors created from red, green, and blue values
Unfortunately, CMYK (approximately 55,000 printable colors created from cyan, magenta, yellow, and black values) is not an option for Web display.
In practical terms, only Grayscale, Indexed Color, and RGB are used for the Web because they’re the only modes supported by the two most popular Web-capable image file formats, GIF and JPEG (described later in this chapter). (Actually, JPEG does support CMYK color, but it must be converted back to RGB for display in a browser, so the option is of little value.) The color mode you choose affects how your image is displayed. Modes of 256 (or fewer) colors are great for images that contain a limited number of hues, but not for the display of images that call for full color. But if you use RGB color mode with full-color images, they frequently (but not always) produce larger files that take a long time to download. For reasons like these, you have to make tradeoffs when selecting the right mode. Fortunately, the Save for Web feature enables you to compare the different modes and make a wise decision.
Understanding Photoshop Color Modes
![Understanding Photoshop Color Modes]()
Reviewed by Pepen2710
on
5:26:00 AM
Rating:
No comments:
Post a Comment