#2181BC#2181BC

#2181BC is a mid, vivid cyan. Relative luminance 0.197; OKLCH L 57.8% C 0.124 H 241.7°. Best body text is #000000 at 4.93:1 contrast (WCAG AA passes).

Color values

HEX	#2181BC
RGB	rgb(33, 129, 188)
HSL	hsl(203, 70%, 43%)
HSV	hsv(203, 82%, 74%)
CMYK	cmyk(82.4%, 31.4%, 0%, 26.3%)
CIE-LAB	lab(51.44, -5.97, -38.47)
CIE-LCH	lch(51.44, 38.93, 261.17°)
OKLab	oklab(57.8% -0.0588 -0.1092)
OKLCH	oklch(57.8% 0.124 241.7)
XYZ	xyz(17.5510, 19.6525, 50.4355)
Luminance	0.1966 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#2181BC #BC5C21

analogous

#21BCA9 #2181BC #2133BC

triadic

#2181BC #BC2181 #81BC21

tetradic

#2181BC #A921BC #BC5C21 #33BC21

square

#2181BC #A921BC #BC5C21 #33BC21

split-complementary

#2181BC #BC2133 #BCA921

monochromatic

#0F3A54 #185D88 #2181BC #3DA0DD #71BAE6

Accessibility & contrast

On white

4.26

#2181BC on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.93

#2181BC on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #2181BC

4.93:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##2181BC	#FFFFFF	#000000	##000000
##2181BC	1.00	4.26	4.93	4.93
#FFFFFF	4.26	1.00	21.00	21.00
#000000	4.93	21.00	1.00	1.00
##000000	4.93	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6582BF

Deuteranopia (green-blind)

#5074BB

Tritanopia (blue-blind)

#009096

Achromatopsia (no color)

#7B7B7B

Design tokens & code

CSS

--color: #2181bc;
/* rgb */ color: rgb(33, 129, 188);
/* oklch */ color: oklch(57.8% 0.124 241.7);

Tailwind

colors: {
  custom: {
    50: '#77a5d0',
    500: '#2181bc',
    950: '#000000',
  },
}

SCSS

$custom: #2181bc;
$custom-light: #77a5d0;
$custom-dark: #000000;

JSON

{
  "hex": "#2181bc",
  "rgb": {
    "r": 33,
    "g": 129,
    "b": 188
  },
  "hsl": {
    "h": 202.839,
    "s": 70.136,
    "l": 43.333
  },
  "oklch": {
    "l": 0.57805,
    "c": 0.124,
    "h": 241.7
  },
  "luminance": 0.19655
}

Semantic roles & 50–950 ramp

primary

#2181BC

secondary

#CD916C

accent

#7F3BED

background

#F7FAFC

surface

#EEF4F9

border

#C9CED2

text

#0A0F14

muted

#7C7F82

Preview Lab

Preview with #2181BC

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

Preview Lab → · Contrast checker → · Palette generator →