#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
RGBrgb(61, 129, 203)
HSLhsl(211, 58%, 52%)
HSVhsv(211, 70%, 80%)
CMYKcmyk(70%, 36.5%, 0%, 20.4%)
CIE-LABlab(52.95, 2.89, -44.59)
CIE-LCHlch(52.95, 44.69, 273.71°)
OKLaboklab(59.45% -0.0397 -0.1268)
OKLCHoklch(59.45% 0.133 252.6)
XYZxyz(20.5502, 21.0022, 59.4591)
Luminance0.2100 (WCAG relative)
Temperaturecool
Familycyan

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
##3D81CB1.004.045.205.20
#FFFFFF4.041.0021.0021.00
#0000005.2021.001.001.00
##0000005.2021.001.001.00

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 →

#3D81CB Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva