#2166AA#2166AA

#2166AA is a mid, vivid cyan. Relative luminance 0.127; OKLCH L 50.3% C 0.128 H 251.8°. Best body text is #FFFFFF at 5.92:1 contrast (WCAG AA passes).

Color values

HEX	#2166AA
RGB	rgb(33, 102, 170)
HSL	hsl(210, 67%, 40%)
HSV	hsv(210, 81%, 67%)
CMYK	cmyk(80.6%, 40%, 0%, 33.3%)
CIE-LAB	lab(42.35, 3.65, -42.42)
CIE-LCH	lch(42.35, 42.57, 274.92°)
OKLab	oklab(50.34% -0.0399 -0.1212)
OKLCH	oklch(50.34% 0.128 251.8)
XYZ	xyz(12.6315, 12.7268, 39.8132)
Luminance	0.1273 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#2166AA #AA6521

analogous

#21AAAA #2166AA #2121AA

triadic

#2166AA #AA2166 #66AA21

tetradic

#2166AA #AA21AA #AA6521 #21AA21

square

#2166AA #AA21AA #AA6521 #21AA21

split-complementary

#2166AA #AA2121 #AAAA21

monochromatic

#0D2843 #174777 #2166AA #3185D7 #64A3E1

Accessibility & contrast

On white

5.92

#2166AA on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.55

#2166AA on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #2166AA

5.92:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##2166AA	#FFFFFF	#000000	##FFFFFF
##2166AA	1.00	5.92	3.55	5.92
#FFFFFF	5.92	1.00	21.00	1.00
#000000	3.55	21.00	1.00	21.00
##FFFFFF	5.92	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#456BAD

Deuteranopia (green-blind)

#2F5EA9

Tritanopia (blue-blind)

#007680

Achromatopsia (no color)

#646464

Design tokens & code

CSS

--color: #2166aa;
/* rgb */ color: rgb(33, 102, 170);
/* oklch */ color: oklch(50.3% 0.128 251.8);

Tailwind

colors: {
  custom: {
    50: '#7291c4',
    500: '#2166aa',
    950: '#000000',
  },
}

SCSS

$custom: #2166aa;
$custom-light: #7291c4;
$custom-dark: #000000;

JSON

{
  "hex": "#2166aa",
  "rgb": {
    "r": 33,
    "g": 102,
    "b": 170
  },
  "hsl": {
    "h": 209.781,
    "s": 67.488,
    "l": 39.804
  },
  "oklch": {
    "l": 0.50336,
    "c": 0.12759,
    "h": 251.8
  },
  "luminance": 0.12728
}

Semantic roles & 50–950 ramp

primary

#2166AA

secondary

#C69361

accent

#933DEA

background

#F7F8FC

surface

#EEF0F8

border

#C9CBD1

text

#090C12

muted

#7B7D81

Preview Lab

Preview with #2166AA

Body copy rendered with the generated semantic roles for this colour.

Preview Lab → · Contrast checker → · Palette generator →