#3B81CC#3B81CC

#3B81CC is a mid, vivid cyan. Relative luminance 0.210; OKLCH L 59.4% C 0.135 H 252.4°. Best body text is #000000 at 5.20:1 contrast (WCAG AA passes).

Color values

HEX	#3B81CC
RGB	rgb(59, 129, 204)
HSL	hsl(211, 59%, 52%)
HSV	hsv(211, 71%, 80%)
CMYK	cmyk(71.1%, 36.8%, 0%, 20%)
CIE-LAB	lab(52.94, 2.95, -45.19)
CIE-LCH	lch(52.94, 45.29, 273.74°)
OKLab	oklab(59.44% -0.0407 -0.1286)
OKLCH	oklch(59.44% 0.135 252.4)
XYZ	xyz(20.5489, 20.9877, 60.0831)
Luminance	0.2099 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3B81CC #CC863B

analogous

#3BCACC #3B81CC #3E3BCC

triadic

#3B81CC #CC3B81 #81CC3B

tetradic

#3B81CC #CC3BCA #CC863B #3BCC3E

square

#3B81CC #CC3BCA #CC863B #3BCC3E

split-complementary

#3B81CC #CC3E3B #CACC3B

monochromatic

#1D4570 #2A63A0 #3B81CC #6CA0D9 #9CBFE5

Accessibility & contrast

On white

4.04

#3B81CC on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.20

#3B81CC on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3B81CC

5.20:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3B81CC	#FFFFFF	#000000	##000000
##3B81CC	1.00	4.04	5.20	5.20
#FFFFFF	4.04	1.00	21.00	21.00
#000000	5.20	21.00	1.00	1.00
##000000	5.20	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5F86CF

Deuteranopia (green-blind)

#4978CB

Tritanopia (blue-blind)

#00939D

Achromatopsia (no color)

#7E7E7E

Design tokens & code

CSS

--color: #3b81cc;
/* rgb */ color: rgb(59, 129, 204);
/* oklch */ color: oklch(59.4% 0.135 252.4);

Tailwind

colors: {
  custom: {
    50: '#82a5dc',
    500: '#3b81cc',
    950: '#000000',
  },
}

SCSS

$custom: #3b81cc;
$custom-light: #82a5dc;
$custom-dark: #000000;

JSON

{
  "hex": "#3b81cc",
  "rgb": {
    "r": 59,
    "g": 129,
    "b": 204
  },
  "hsl": {
    "h": 211.034,
    "s": 58.704,
    "l": 51.569
  },
  "oklch": {
    "l": 0.5944,
    "c": 0.13487,
    "h": 252.4
  },
  "luminance": 0.2099
}

Semantic roles & 50–950 ramp

primary

#3B81CC

secondary

#D1B392

accent

#9746E2

background

#F8FAFD

surface

#F0F4FB

border

#CBCED4

text

#0C0F15

muted

#7D7F83

Preview Lab

Preview with #3B81CC

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

Preview Lab → · Contrast checker → · Palette generator →