#3D81CB#3D81CB

#3D81CB is a mid, vivid cyan. Relative luminance 0.210; OKLCH L 59.5% C 0.133 H 252.6°. Best body text is #000000 at 5.20:1 contrast (WCAG AA passes).

Color values

HEX	#3D81CB
RGB	rgb(61, 129, 203)
HSL	hsl(211, 58%, 52%)
HSV	hsv(211, 70%, 80%)
CMYK	cmyk(70%, 36.5%, 0%, 20.4%)
CIE-LAB	lab(52.95, 2.89, -44.59)
CIE-LCH	lch(52.95, 44.69, 273.71°)
OKLab	oklab(59.45% -0.0397 -0.1268)
OKLCH	oklch(59.45% 0.133 252.6)
XYZ	xyz(20.5502, 21.0022, 59.4591)
Luminance	0.2100 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3D81CB #CB873D

analogous

#3DC8CB #3D81CB #403DCB

triadic

#3D81CB #CB3D81 #81CB3D

tetradic

#3D81CB #CB3DC8 #CB873D #3DCB40

square

#3D81CB #CB3DC8 #CB873D #3DCB40

split-complementary

#3D81CB #CB403D #C8CB3D

monochromatic

#1E4570 #2B63A0 #3D81CB #6DA0D8 #9EC0E5

Accessibility & contrast

On white

4.04

#3D81CB on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.20

#3D81CB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3D81CB

5.20:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3D81CB	#FFFFFF	#000000	##000000
##3D81CB	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)

#6086CE

Deuteranopia (green-blind)

#4B78CA

Tritanopia (blue-blind)

#00929C

Achromatopsia (no color)

#7E7E7E

Design tokens & code

CSS

--color: #3d81cb;
/* rgb */ color: rgb(61, 129, 203);
/* oklch */ color: oklch(59.5% 0.133 252.6);

Tailwind

colors: {
  custom: {
    50: '#83a5db',
    500: '#3d81cb',
    950: '#000000',
  },
}

SCSS

$custom: #3d81cb;
$custom-light: #83a5db;
$custom-dark: #000000;

JSON

{
  "hex": "#3d81cb",
  "rgb": {
    "r": 61,
    "g": 129,
    "b": 203
  },
  "hsl": {
    "h": 211.268,
    "s": 57.724,
    "l": 51.765
  },
  "oklch": {
    "l": 0.59454,
    "c": 0.13286,
    "h": 252.6
  },
  "luminance": 0.21004
}

Semantic roles & 50–950 ramp

primary

#3D81CB

secondary

#D1B393

accent

#9747E1

background

#F8FAFD

surface

#F0F4FB

border

#CBCED4

text

#0C0F15

muted

#7D7F83

Preview Lab

Preview with #3D81CB

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

Preview Lab → · Contrast checker → · Palette generator →