#3F81BE#3F81BE

#3F81BE is a mid, moderate cyan. Relative luminance 0.205; OKLCH L 58.8% C 0.116 H 248.8°. Best body text is #000000 at 5.09:1 contrast (WCAG AA passes).

Color values

HEX	#3F81BE
RGB	rgb(63, 129, 190)
HSL	hsl(209, 50%, 50%)
HSV	hsv(209, 67%, 75%)
CMYK	cmyk(66.8%, 32.1%, 0%, 25.5%)
CIE-LAB	lab(52.37, -1.36, -38.10)
CIE-LCH	lch(52.37, 38.12, 267.96°)
OKLab	oklab(58.8% -0.0418 -0.1078)
OKLCH	oklch(58.8% 0.116 248.8)
XYZ	xyz(19.1910, 20.4730, 51.6455)
Luminance	0.2047 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F81BE #BE7C3F

analogous

#3FBEBC #3F81BE #3F41BE

triadic

#3F81BE #BE3F81 #81BE3F

tetradic

#3F81BE #BC3FBE #BE7C3F #41BE3F

square

#3F81BE #BC3FBE #BE7C3F #41BE3F

split-complementary

#3F81BE #BE3F41 #BEBC3F

monochromatic

#214362 #306290 #3F81BE #6C9FCE #9ABDDD

Accessibility & contrast

On white

4.12

#3F81BE on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.09

#3F81BE on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3F81BE

5.09:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F81BE	#FFFFFF	#000000	##000000
##3F81BE	1.00	4.12	5.09	5.09
#FFFFFF	4.12	1.00	21.00	21.00
#000000	5.09	21.00	1.00	1.00
##000000	5.09	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6684C1

Deuteranopia (green-blind)

#5577BD

Tritanopia (blue-blind)

#008F97

Achromatopsia (no color)

#7D7D7D

Design tokens & code

CSS

--color: #3f81be;
/* rgb */ color: rgb(63, 129, 190);
/* oklch */ color: oklch(58.8% 0.116 248.8);

Tailwind

colors: {
  custom: {
    50: '#81a5d2',
    500: '#3f81be',
    950: '#000000',
  },
}

SCSS

$custom: #3f81be;
$custom-light: #81a5d2;
$custom-dark: #000000;

JSON

{
  "hex": "#3f81be",
  "rgb": {
    "r": 63,
    "g": 129,
    "b": 190
  },
  "hsl": {
    "h": 208.819,
    "s": 50.198,
    "l": 49.608
  },
  "oklch": {
    "l": 0.58802,
    "c": 0.11564,
    "h": 248.8
  },
  "luminance": 0.20475
}

Semantic roles & 50–950 ramp

primary

#3F81BE

secondary

#C9AB8F

accent

#914EDA

background

#F8FAFC

surface

#F0F4F9

border

#CBCED2

text

#0B0F14

muted

#7C7F82

Preview Lab

Preview with #3F81BE

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

Preview Lab → · Contrast checker → · Palette generator →