Here You can set color in RGB color model and watch at complimentary colors at bottom of the page or just click random color.
Basic color:
#02655f; rgb(2,101,95); hsl(176,96%,20%);
black
black
white
white
Complementary colors:
Analogous harmony (H+30):
#023964; rgb(2,57,100); hsl(206,96%,20%);
black
black
white
white
Analogous harmony (H-30):
#02642d; rgb(2,100,45); hsl(146,96%,20%);
black
black
white
white
Triadic harmony (H+120):
#5f0264; rgb(95,2,100); hsl(296,96%,20%);
black
black
white
white
Triadic harmony (H-120):
#645e02; rgb(100,94,2); hsl(56,96%,20%);
black
black
white
white
Split complements harmony (H+150):
#640238; rgb(100,2,56); hsl(326,96%,20%);
black
black
white
white
Split complements harmony (H-150):
#642d02; rgb(100,45,2); hsl(26,96%,20%);
black
black
white
white
Complement harmony (H+180):
#640207; rgb(100,2,7); hsl(356,96%,20%);
black
black
white
white
Monochromatic harmony (S+30):
#006660; rgb(0,102,96); hsl(176,100%,20%);
black
black
white
white
Monochromatic harmony (S-30):
#115551; rgb(17,85,81); hsl(176,66%,20%);
black
black
white
white
Monochromatic harmony (L+10):
#03968d; rgb(3,150,141); hsl(176,96%,30%);
black
black
white
white
Monochromatic harmony (L-10):
#01322f; rgb(1,50,47); hsl(176,96%,10%);
black
black
white
white