Take a moment to observe:
T
h
e
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W
o
r
l
d
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o
f.
C
o
l
o
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The Split-Complementary.High contrast yet soothing.
This scheme uses one color and it's complementary's adjacents. This has low tension yet is almost equally high in contrast as the complementary scheme.
Example:
Colors
(Home)
Primary colors
Secondary colors
Tertiary colors
Color Schemes
Analogous
Complementary
Split-Complementary
Triadic
Tetradic