#3F81CC#3F81CC

#3F81CC is a mid, vivid cyan. Relative luminance 0.211; OKLCH L 59.6% C 0.133 H 253.4°. Best body text is #000000 at 5.22:1 contrast (WCAG AA passes).

Color values

HEX	#3F81CC
RGB	rgb(63, 129, 204)
HSL	hsl(212, 58%, 52%)
HSV	hsv(212, 69%, 80%)
CMYK	cmyk(69.1%, 36.8%, 0%, 20%)
CIE-LAB	lab(53.07, 3.55, -44.96)
CIE-LCH	lch(53.07, 45.10, 274.51°)
OKLab	oklab(59.59% -0.0381 -0.1278)
OKLCH	oklch(59.59% 0.133 253.4)
XYZ	xyz(20.7952, 21.1147, 60.0946)
Luminance	0.2112 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F81CC #CC8A3F

analogous

#3FC8CC #3F81CC #443FCC

triadic

#3F81CC #CC3F81 #81CC3F

tetradic

#3F81CC #CC3FC8 #CC8A3F #3FCC44

square

#3F81CC #CC3FC8 #CC8A3F #3FCC44

split-complementary

#3F81CC #CC443F #C8CC3F

monochromatic

#1E4672 #2B63A3 #3F81CC #6FA1D9 #A0C0E6

Accessibility & contrast

On white

4.02

#3F81CC on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.22

#3F81CC on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3F81CC

5.22:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F81CC	#FFFFFF	#000000	##000000
##3F81CC	1.00	4.02	5.22	5.22
#FFFFFF	4.02	1.00	21.00	21.00
#000000	5.22	21.00	1.00	1.00
##000000	5.22	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5F86CF

Deuteranopia (green-blind)

#4B79CA

Tritanopia (blue-blind)

#00929D

Achromatopsia (no color)

#7F7F7F

Design tokens & code

CSS

--color: #3f81cc;
/* rgb */ color: rgb(63, 129, 204);
/* oklch */ color: oklch(59.6% 0.133 253.4);

Tailwind

colors: {
  custom: {
    50: '#84a5dc',
    500: '#3f81cc',
    950: '#000000',
  },
}

SCSS

$custom: #3f81cc;
$custom-light: #84a5dc;
$custom-dark: #000000;

JSON

{
  "hex": "#3f81cc",
  "rgb": {
    "r": 63,
    "g": 129,
    "b": 204
  },
  "hsl": {
    "h": 211.915,
    "s": 58.025,
    "l": 52.353
  },
  "oklch": {
    "l": 0.59587,
    "c": 0.13339,
    "h": 253.4
  },
  "luminance": 0.21117
}

Semantic roles & 50–950 ramp

primary

#3F81CC

secondary

#D2B595

accent

#9947E1

background

#F8FAFD

surface

#F0F4FB

border

#CBCED4

text

#0C0F15

muted

#7D7F83

Preview Lab

Preview with #3F81CC

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

Preview Lab → · Contrast checker → · Palette generator →