#3981BB#3981BB

#3981BB is a mid, moderate cyan. Relative luminance 0.202; OKLCH L 58.4% C 0.115 H 245.9°. Best body text is #000000 at 5.03:1 contrast (WCAG AA passes).

Color values

HEX	#3981BB
RGB	rgb(57, 129, 187)
HSL	hsl(207, 53%, 48%)
HSV	hsv(207, 70%, 73%)
CMYK	cmyk(69.5%, 31%, 0%, 26.7%)
CIE-LAB	lab(52.01, -3.37, -36.95)
CIE-LCH	lch(52.01, 37.11, 264.78°)
OKLab	oklab(58.42% -0.0467 -0.1045)
OKLCH	oklch(58.42% 0.115 245.9)
XYZ	xyz(18.5038, 20.1562, 49.9194)
Luminance	0.2016 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3981BB #BB7339

analogous

#39BBB4 #3981BB #3940BB

triadic

#3981BB #BB3981 #81BB39

tetradic

#3981BB #B439BB #BB7339 #40BB39

square

#3981BB #B439BB #BB7339 #40BB39

split-complementary

#3981BB #BB3940 #BBB439

monochromatic

#1C405D #2B618C #3981BB #629ECF #91BBDD

Accessibility & contrast

On white

4.17

#3981BB on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.03

#3981BB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3981BB

5.03:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3981BB	#FFFFFF	#000000	##000000
##3981BB	1.00	4.17	5.03	5.03
#FFFFFF	4.17	1.00	21.00	21.00
#000000	5.03	21.00	1.00	1.00
##000000	5.03	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6783BE

Deuteranopia (green-blind)

#5576BA

Tritanopia (blue-blind)

#008F96

Achromatopsia (no color)

#7C7C7C

Design tokens & code

CSS

--color: #3981bb;
/* rgb */ color: rgb(57, 129, 187);
/* oklch */ color: oklch(58.4% 0.115 245.9);

Tailwind

colors: {
  custom: {
    50: '#7ea5cf',
    500: '#3981bb',
    950: '#000000',
  },
}

SCSS

$custom: #3981bb;
$custom-light: #7ea5cf;
$custom-dark: #000000;

JSON

{
  "hex": "#3981bb",
  "rgb": {
    "r": 57,
    "g": 129,
    "b": 187
  },
  "hsl": {
    "h": 206.769,
    "s": 53.279,
    "l": 47.843
  },
  "oklch": {
    "l": 0.58417,
    "c": 0.11453,
    "h": 245.9
  },
  "luminance": 0.20158
}

Semantic roles & 50–950 ramp

primary

#3981BB

secondary

#C8A487

accent

#8C4BDD

background

#F8FAFC

surface

#EFF4F9

border

#CACED2

text

#0B0F14

muted

#7C7F82

Preview Lab

Preview with #3981BB

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

Preview Lab → · Contrast checker → · Palette generator →