Adobe ADBCD17648MC Manuale Utente

In Adobe®

  Photoshop®

  Elements, you use two color models to manipulate color. One model is based on the way the 

human eye sees color—hue, saturation, and brightness (HSB), while the other model is based on the way computer 
monitors display color (in amounts of red, green, and blue or RGB). The color wheel is another tool that helps you 
understand the relationships between colors. Photoshop

  Elements provides four image modes that determine the 

number of colors displayed in an image: RGB, bitmap, grayscale, and indexed color.

The human eye perceives color in terms of three characteristics—hue, saturation, and brightness (HSB)—whereas 
computer monitors display colors by generating varying amounts of red, green, and blue (RGB) light. In 
Photoshop

  Elements, you use the HSB and RGB color models to select and manipulate color. The color wheel can help 

you understand the relationships between colors.

Based on the human perception of color, the HSB model describes three fundamental characteristics of color: 

The color reflected from or transmitted through an object. It is measured as a location on the standard color 

wheel, expressed as a degree between 0 and 360. In common use, hue is identified by the name of the color, such as 
red, orange, or green.

The strength or purity of the color. Saturation, which is sometimes called chroma, represents the amount 

of gray in proportion to the hue, measured as a percentage from 0 (gray) to 100 (fully saturated). On the standard color 
wheel, saturation increases from the center to the edge.

The relative lightness or darkness of the color, usually measured as a percentage from 0 (black) to 100 

(white).

Although you can use the HSB model in Photoshop

  Elements to define a color in the Color Picker dialog box, you 

cannot use the HSB mode to create and edit images.

0 

100 

0 360 

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100