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Tips: Skyline Photography

Photoshop Elements > Color >

RGB Color

RGB color uses the additive colors: red , green, and blue.

Additive colors are produced by light sources, not by reflection from the surfaces of objects, as are the subtractive colors.

Because additive colors are produced by light sources, they're often called lights.

RGB Numbers

The brightness (luminosity), of the red, green, and blue lights, is designated by the numbers from 0 through 255.

White & Black Lights

When the red, green, and blue lights are at their brightest, 255, white light is seen.

255 255 255

When all of the RGB lights are off, 0, no light is seen.

0 0 0

Brightness - Gray Lights

When all of the RGB lights are on, and their brightness (luminosity) is the same, various shades of gray are seen.

60 60 60

120 120 120

180 180 180

Color Lights

When one of the lights is on, and the other two lights are off, the color (hue) of the on light is seen.

255 0 0

0 255 0

0 0 255

The above colors, red, green, and blue, are the primary color lights.

Other Color Lights

Colors other than the primary color lights are produced by varying the numbers.

255 0 0

Red Primary Light

255 128 0

Orange Light

128 green was added, reducing magenta, making an orange light.

Brightness Again

Just as the brightness of gray was varied by changing the numbers, the brightness of a color is changed by:

• Varying the color's number.

• Keeping the other colors the same.

Below, the brightness of the red primary light is changed.

255 0 0

Red Primary Light

220 0 0

Red Medium

180 0 0

Red Dark

Saturation

The saturation of a color can be changed by increasing or decreasing, equally, the other two colors.

When the RGB values are far apart from each other, the color is more saturated.

As the RGB values become closer to each other, the saturation is decreased, because gray is being added.

255 0 0

Red Primary Light - Maximum Saturation

The RGB values are far apart, so the saturation is high.

255 90 90

Less Saturation

90 green & 90 blue were added, reducing the saturation of the 255 0 0 red.

The RGB values are closer together, reducing the saturation.

255 180 180

Even Less Saturation

180 green & 180 blue were added, further reducing the saturation.

The RGB values are even closer, reducing the saturation greatly.

Hexadecimal Color

Hexadecimal color is another away to define color.

Go to Hexadecimal Color.