#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
RGBrgb(33, 129, 164)
HSLhsl(196, 66%, 39%)
HSVhsv(196, 80%, 64%)
CMYKcmyk(79.9%, 21.3%, 0%, 35.7%)
CIE-LABlab(50.34, -14.68, -26.34)
CIE-LCHlch(50.34, 30.16, 240.86°)
OKLaboklab(56.56% -0.0671 -0.074)
OKLCHoklch(56.56% 0.1 227.8)
XYZxyz(15.1755, 18.7023, 37.9248)
Luminance0.1870 (WCAG relative)
Temperaturecool
Familycyan

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
##2181A41.004.434.744.74
#FFFFFF4.431.0021.0021.00
#0000004.7421.001.001.00
##0000004.7421.001.001.00

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 →

#2181A4 Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva