#3873BB#3873BB

#3873BB is a mid, vivid cyan. Relative luminance 0.167; OKLCH L 55.2% C 0.128 H 254.8°. Best body text is #FFFFFF at 4.84:1 contrast (WCAG AA passes).

Color values

HEX	#3873BB
RGB	rgb(56, 115, 187)
HSL	hsl(213, 54%, 48%)
HSV	hsv(213, 70%, 73%)
CMYK	cmyk(70.1%, 38.5%, 0%, 26.7%)
CIE-LAB	lab(47.86, 4.92, -43.51)
CIE-LCH	lch(47.86, 43.79, 276.46°)
OKLab	oklab(55.15% -0.0336 -0.1239)
OKLCH	oklch(55.15% 0.128 254.8)
XYZ	xyz(16.7280, 16.6883, 49.3436)
Luminance	0.1669 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3873BB #BB8038

analogous

#38B4BB #3873BB #3F38BB

triadic

#3873BB #BB3873 #73BB38

tetradic

#3873BB #BB38B4 #BB8038 #38BB3F

square

#3873BB #BB38B4 #BB8038 #38BB3F

split-complementary

#3873BB #BB3F38 #B4BB38

monochromatic

#1C395D #2A568C #3873BB #6193D0 #90B3DE

Accessibility & contrast

On white

4.84

#3873BB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.34

#3873BB on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3873BB

4.84:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3873BB	#FFFFFF	#000000	##FFFFFF
##3873BB	1.00	4.84	4.34	4.84
#FFFFFF	4.84	1.00	21.00	1.00
#000000	4.34	21.00	1.00	21.00
##FFFFFF	4.84	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5278BE

Deuteranopia (green-blind)

#3E6CBA

Tritanopia (blue-blind)

#00848E

Achromatopsia (no color)

#727272

Design tokens & code

CSS

--color: #3873bb;
/* rgb */ color: rgb(56, 115, 187);
/* oklch */ color: oklch(55.2% 0.128 254.8);

Tailwind

colors: {
  custom: {
    50: '#7e9ad0',
    500: '#3873bb',
    950: '#000000',
  },
}

SCSS

$custom: #3873bb;
$custom-light: #7e9ad0;
$custom-dark: #000000;

JSON

{
  "hex": "#3873bb",
  "rgb": {
    "r": 56,
    "g": 115,
    "b": 187
  },
  "hsl": {
    "h": 212.977,
    "s": 53.909,
    "l": 47.647
  },
  "oklch": {
    "l": 0.55154,
    "c": 0.12837,
    "h": 254.8
  },
  "luminance": 0.1669
}

Semantic roles & 50–950 ramp

primary

#3873BB

secondary

#C8AB86

accent

#9B4BDD

background

#F8F9FC

surface

#EFF2F9

border

#CACCD2

text

#0B0E14

muted

#7C7E82

Preview Lab

Preview with #3873BB

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

Preview Lab → · Contrast checker → · Palette generator →