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IDL

Loading Default Color Tables

Loading Default Color Tables

Loading Default Color Tables


IDL uses color tables to associate pixel values in indexed images with specific RGB color values.

To define a color table in graphics functions such as IMAGE and MAP, use the RGB_TABLE property. If no color table is defined, these graphics display in gray scale. The color tables on the right are ColorBrewer schemes.

IDL provides predefined color tables, each with an index value as shown in the following table. At any time during your IDL session, you can pull up a widget window showing a brief listing of the predefined colortables by typing the following command at the IDL prompt:

XLOADCT

 

Name

Sample

 

 

Name

Sample

0

Black-White Linear

 

41

CB-Accent

1

Blue-White Linear

 

42

CB-Dark2

2

Green-Red-Blue-White

 

43

CB-Paired

3

Red Temperature

 

44

CB-Pastel1

4

Blue-Green-Red-Yellow

 

45

CB-Pastel2

5

Standard Gamma-II

 

46

CB-Set1

6

Prism

 

47

CB-Set2

7

Red-Purple

 

48

CB-Set3

8

Green-White Linear

 

49

CB-Blues

9

Green-White Exponential

 

50

CB-BuGn

10

Green-Pink

 

51

CB-BuPu

11

Blue-Red

 

52

CB-GnBu

12

16 Level

 

53

CB-Greens

13

Rainbow

 

54

CB-Greys

14

Steps

 

55

CB-Oranges

15

Stern Special

 

56

CB-OrRd

16

Haze

 

57

CB-PuBu

17

Blue-Pastel-Red

 

58

CB-PuBuGn

18

Pastels

 

59

CB-PuRd

19

Hue Sat Lightness 1

 

60

CB-Purples

20

Hue Sat Lightness 2

 

61

CB-RdPu

21

Hue Sat Value 1

 

62

CB-Reds

22

Hue Sat Value 2

 

63

CB-YIGn

23

Purple-Red + Stripes

 

64

CB-YIGnBu

24

Beach

 

65

CB-YIOrBr

25

Mac Style

 

66

CB-BrBG

26

Eos A

 

67

CB-PiYG

27

Eos B

 

68

CB-PRGn

28

Hardcandy

 

69

CB-PuOr

29

Nature

 

70

CB-RdBu

30

Ocean

 

71

CB-RdGy

31

Peppermint

 

72

CB-RdYiBu

32

Plasma

 

73

CB-RdYiGn

33

Blue-Red 2

 

74

CB-Spectral

34

Rainbow 2

 

 

 

 

35

Blue Waves

 

 

 

 

36

Volcano

 

 

 

 

37

Waves

 

 

 

 

38

Rainbow 18

 

 

 

 

39

Rainbow + White

 

 

 

 

40

Rainbow + Black

 

 

 

 

Also see Color Tables in Direct Graphics.



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