#3781BF#3781BF

#3781BF is a mid, vivid cyan. Relative luminance 0.203; OKLCH L 58.6% C 0.120 H 247.1°. Best body text is #000000 at 5.05:1 contrast (WCAG AA passes).

Color values

HEX	#3781BF
RGB	rgb(55, 129, 191)
HSL	hsl(207, 55%, 48%)
HSV	hsv(207, 71%, 75%)
CMYK	cmyk(71.2%, 32.5%, 0%, 25.1%)
CIE-LAB	lab(52.14, -2.26, -39.04)
CIE-LCH	lch(52.14, 39.11, 266.68°)
OKLab	oklab(58.57% -0.0468 -0.1107)
OKLCH	oklch(58.57% 0.12 247.1)
XYZ	xyz(18.8262, 20.2723, 52.2009)
Luminance	0.2027 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3781BF #BF7537

analogous

#37BFB9 #3781BF #373DBF

triadic

#3781BF #BF3781 #81BF37

tetradic

#3781BF #B937BF #BF7537 #3DBF37

square

#3781BF #B937BF #BF7537 #3DBF37

split-complementary

#3781BF #BF373D #BFB937

monochromatic

#1C4160 #29618F #3781BF #629FD2 #91BCDF

Accessibility & contrast

On white

4.15

#3781BF on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.05

#3781BF on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3781BF

5.05:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3781BF	#FFFFFF	#000000	##000000
##3781BF	1.00	4.15	5.05	5.05
#FFFFFF	4.15	1.00	21.00	21.00
#000000	5.05	21.00	1.00	1.00
##000000	5.05	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6583C2

Deuteranopia (green-blind)

#5277BE

Tritanopia (blue-blind)

#009097

Achromatopsia (no color)

#7C7C7C

Design tokens & code

CSS

--color: #3781bf;
/* rgb */ color: rgb(55, 129, 191);
/* oklch */ color: oklch(58.6% 0.120 247.1);

Tailwind

colors: {
  custom: {
    50: '#7ea5d2',
    500: '#3781bf',
    950: '#000000',
  },
}

SCSS

$custom: #3781bf;
$custom-light: #7ea5d2;
$custom-dark: #000000;

JSON

{
  "hex": "#3781bf",
  "rgb": {
    "r": 55,
    "g": 129,
    "b": 191
  },
  "hsl": {
    "h": 207.353,
    "s": 55.285,
    "l": 48.235
  },
  "oklch": {
    "l": 0.58565,
    "c": 0.12016,
    "h": 247.1
  },
  "luminance": 0.20274
}

Semantic roles & 50–950 ramp

primary

#3781BF

secondary

#CAA688

accent

#8D49DF

background

#F8FAFC

surface

#EFF4F9

border

#CACED2

text

#0B0F14

muted

#7C7F82

Preview Lab

Preview with #3781BF

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

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