#2181A4#2181A4

#2181A4 is a mid, moderate cyan. Relative luminance 0.187; OKLCH L 56.6% C 0.100 H 227.8°. Best body text is #000000 at 4.74:1 contrast (WCAG AA passes).

Color values

HEX	#2181A4
RGB	rgb(33, 129, 164)
HSL	hsl(196, 66%, 39%)
HSV	hsv(196, 80%, 64%)
CMYK	cmyk(79.9%, 21.3%, 0%, 35.7%)
CIE-LAB	lab(50.34, -14.68, -26.34)
CIE-LCH	lch(50.34, 30.16, 240.86°)
OKLab	oklab(56.56% -0.0671 -0.074)
OKLCH	oklch(56.56% 0.1 227.8)
XYZ	xyz(15.1755, 18.7023, 37.9248)
Luminance	0.1870 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#2181A4 #A44421

analogous

#21A485 #2181A4 #213FA4

triadic

#2181A4 #A42181 #81A421

tetradic

#2181A4 #8521A4 #A44421 #3FA421

square

#2181A4 #8521A4 #A44421 #3FA421

split-complementary

#2181A4 #A4213F #A48521

monochromatic

#0C313E #175971 #2181A4 #2DA8D5 #60BDDF

Accessibility & contrast

On white

4.43

#2181A4 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.74

#2181A4 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #2181A4

4.74:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##2181A4	#FFFFFF	#000000	##000000
##2181A4	1.00	4.43	4.74	4.74
#FFFFFF	4.43	1.00	21.00	21.00
#000000	4.74	21.00	1.00	1.00
##000000	4.74	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6E7FA6

Deuteranopia (green-blind)

#5D72A4

Tritanopia (blue-blind)

#008B8D

Achromatopsia (no color)

#787878

Design tokens & code

CSS

--color: #2181a4;
/* rgb */ color: rgb(33, 129, 164);
/* oklch */ color: oklch(56.6% 0.100 227.8);

Tailwind

colors: {
  custom: {
    50: '#72a5bf',
    500: '#2181a4',
    950: '#000000',
  },
}

SCSS

$custom: #2181a4;
$custom-light: #72a5bf;
$custom-dark: #000000;

JSON

{
  "hex": "#2181a4",
  "rgb": {
    "r": 33,
    "g": 129,
    "b": 164
  },
  "hsl": {
    "h": 196.031,
    "s": 66.497,
    "l": 38.627
  },
  "oklch": {
    "l": 0.56562,
    "c": 0.09989,
    "h": 227.8
  },
  "luminance": 0.18704
}

Semantic roles & 50–950 ramp

primary

#2181A4

secondary

#C4785D

accent

#6C3EE9

background

#F7FAFB

surface

#EDF4F7

border

#C8CED0

text

#090F12

muted

#7B7F81

Preview Lab

Preview with #2181A4

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

Preview Lab → · Contrast checker → · Palette generator →