#3857AB#3857AB

#3857AB is a mid, vivid blue. Relative luminance 0.106; OKLCH L 47.9% C 0.139 H 266.1°. Best body text is #FFFFFF at 6.73:1 contrast (WCAG AA passes).

Color values

HEX	#3857AB
RGB	rgb(56, 87, 171)
HSL	hsl(224, 51%, 45%)
HSV	hsv(224, 67%, 67%)
CMYK	cmyk(67.3%, 49.1%, 0%, 32.9%)
CIE-LAB	lab(38.89, 16.90, -48.49)
CIE-LCH	lch(38.89, 51.35, 289.21°)
OKLab	oklab(47.92% -0.0096 -0.139)
OKLCH	oklch(47.92% 0.139 266.1)
XYZ	xyz(12.3872, 10.5962, 39.9127)
Luminance	0.1060 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3857AB #AB8C38

analogous

#3891AB #3857AB #5338AB

triadic

#3857AB #AB3857 #57AB38

tetradic

#3857AB #AB3891 #AB8C38 #38AB53

square

#3857AB #AB3891 #AB8C38 #38AB53

split-complementary

#3857AB #AB5338 #91AB38

monochromatic

#1A284F #29407D #3857AB #5876C8 #869CD7

Accessibility & contrast

On white

6.73

#3857AB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.12

#3857AB on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3857AB

6.73:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3857AB	#FFFFFF	#000000	##FFFFFF
##3857AB	1.00	6.73	3.12	6.73
#FFFFFF	6.73	1.00	21.00	1.00
#000000	3.12	21.00	1.00	21.00
##FFFFFF	6.73	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2A61AE

Deuteranopia (green-blind)

#0C57A9

Tritanopia (blue-blind)

#006B79

Achromatopsia (no color)

#5C5C5C

Design tokens & code

CSS

--color: #3857ab;
/* rgb */ color: rgb(56, 87, 171);
/* oklch */ color: oklch(47.9% 0.139 266.1);

Tailwind

colors: {
  custom: {
    50: '#7b85c4',
    500: '#3857ab',
    950: '#000000',
  },
}

SCSS

$custom: #3857ab;
$custom-light: #7b85c4;
$custom-dark: #000000;

JSON

{
  "hex": "#3857ab",
  "rgb": {
    "r": 56,
    "g": 87,
    "b": 171
  },
  "hsl": {
    "h": 223.826,
    "s": 50.661,
    "l": 44.51
  },
  "oklch": {
    "l": 0.4792,
    "c": 0.1393,
    "h": 266.1
  },
  "luminance": 0.10597
}

Semantic roles & 50–950 ramp

primary

#3857AB

secondary

#C1AF7D

accent

#B44EDA

background

#F8F8FC

surface

#EFEFF8

border

#CACAD1

text

#0A0B13

muted

#7C7C82

Preview Lab

Preview with #3857AB

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

Preview Lab → · Contrast checker → · Palette generator →