#3781BD#3781BD

#3781BD is a mid, moderate cyan. Relative luminance 0.202; OKLCH L 58.5% C 0.118 H 246.3°. Best body text is #000000 at 5.04:1 contrast (WCAG AA passes).

Color values

HEX	#3781BD
RGB	rgb(55, 129, 189)
HSL	hsl(207, 55%, 48%)
HSV	hsv(207, 71%, 74%)
CMYK	cmyk(70.9%, 31.7%, 0%, 25.9%)
CIE-LAB	lab(52.05, -2.97, -38.05)
CIE-LCH	lch(52.05, 38.17, 265.53°)
OKLab	oklab(58.46% -0.0474 -0.1078)
OKLCH	oklch(58.46% 0.118 246.3)
XYZ	xyz(18.6076, 20.1848, 51.0496)
Luminance	0.2019 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3781BD #BD7337

analogous

#37BDB6 #3781BD #373EBD

triadic

#3781BD #BD3781 #81BD37

tetradic

#3781BD #B637BD #BD7337 #3EBD37

square

#3781BD #B637BD #BD7337 #3EBD37

split-complementary

#3781BD #BD373E #BDB637

monochromatic

#1B405E #29618E #3781BD #609ED1 #90BBDF

Accessibility & contrast

On white

4.17

#3781BD on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.04

#3781BD on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3781BD

5.04:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3781BD	#FFFFFF	#000000	##000000
##3781BD	1.00	4.17	5.04	5.04
#FFFFFF	4.17	1.00	21.00	21.00
#000000	5.04	21.00	1.00	1.00
##000000	5.04	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6683C0

Deuteranopia (green-blind)

#5376BC

Tritanopia (blue-blind)

#008F96

Achromatopsia (no color)

#7C7C7C

Design tokens & code

CSS

--color: #3781bd;
/* rgb */ color: rgb(55, 129, 189);
/* oklch */ color: oklch(58.5% 0.118 246.3);

Tailwind

colors: {
  custom: {
    50: '#7ea5d1',
    500: '#3781bd',
    950: '#000000',
  },
}

SCSS

$custom: #3781bd;
$custom-light: #7ea5d1;
$custom-dark: #000000;

JSON

{
  "hex": "#3781bd",
  "rgb": {
    "r": 55,
    "g": 129,
    "b": 189
  },
  "hsl": {
    "h": 206.866,
    "s": 54.918,
    "l": 47.843
  },
  "oklch": {
    "l": 0.58455,
    "c": 0.11774,
    "h": 246.3
  },
  "luminance": 0.20187
}

Semantic roles & 50–950 ramp

primary

#3781BD

secondary

#C9A486

accent

#8C4ADE

background

#F8FAFC

surface

#EFF4F9

border

#CACED2

text

#0B0F14

muted

#7C7F82

Preview Lab

Preview with #3781BD

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

Preview Lab → · Contrast checker → · Palette generator →