Exploring the Influence of Colour Distance and Legend Position on Choropleth Maps Readability - Modern Trends in Cartography - page 295

Table 1 Specification of colour schemes with (a) equal and (b) unequal colour distance steps
given in CIE Lab and RGB values
ΔΕ

L a b R G

В

00

a)
10

94.80 30.00 30.00 201 255 179

79.45 30.00 30.00 159 211 138

66.10 30.00 30.00 123 174 104

54.67 30.00 30.00 93 143 76

44.67 30.00 30.00 68 117 52

33.12 30.00 30.00 39 89 26

8 94.80 30.00 30.00 201 255 179

82.39 30.00 30.00 167 219 146

71.22 30.00 30.00 136 188 117

61.34 30.00 30.00 110 161 92

52.63 30.00 30.00 88 138 71

44.58 30.00 30.00 67 117 52

6 94.80 30.00 30.00 201 255 179

85.40

30.00

30.00 175 228 154

76.63 30.00 30.00 151 203 131

68.63 30.00 30.00 129 181 110

61.34 30.00 30.00 110 161 92

54.71 30.00 30.00 93 143 76

4 94.80

30.00

30.00 201 255 179

88.51 30.00 30.00 184 237 162

82.40 30.00 30.00 167 219 146

76.65 30.00 30.00 151 203 131

71.24 30.00 30.00 136 188 117

66.15

30.00

30.00 123 174 104

2 94.80 30.00 30.00 201 255 179

91.70 30.00 30.00 192 246 171

88.50 30.00 30.00 183 237 162

85.40 30.00 30.00 175 228 154

82.39 30.00 30.00 167 219 146

79.47 30.00 30.00 159 211 138

b)
4
8
10
8
4

94.80 30.00 30.00 201 255 179

88.32 30.00 30.00 183 236 162

76.47 30.00 30.00 150 203 131

63.54 30.00 30.00 116 167 98

54.57 30.00 30.00 93 143 76

50.50 30.00 30.00 82 132 66

(continued)