#3857CB#3857CB

#3857CB is a mid, vivid blue. Relative luminance 0.120; OKLCH L 50.4% C 0.183 H 267.8°. Best body text is #FFFFFF at 6.19:1 contrast (WCAG AA passes).

Color values

HEX	#3857CB
RGB	rgb(56, 87, 203)
HSL	hsl(227, 59%, 51%)
HSV	hsv(227, 72%, 80%)
CMYK	cmyk(72.4%, 57.1%, 0%, 20.4%)
CIE-LAB	lab(41.16, 28.61, -63.53)
CIE-LCH	lch(41.16, 69.68, 294.24°)
OKLab	oklab(50.36% -0.007 -0.1832)
OKLCH	oklch(50.36% 0.183 267.8)
XYZ	xyz(15.8148, 11.9673, 57.9648)
Luminance	0.1197 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3857CB #CBAC38

analogous

#38A0CB #3857CB #6238CB

triadic

#3857CB #CB3857 #57CB38

tetradic

#3857CB #CB38A0 #CBAC38 #38CB62

square

#3857CB #CB38A0 #CBAC38 #38CB62

split-complementary

#3857CB #CB6238 #A0CB38

monochromatic

#1C2D6C #29419D #3857CB #6980D8 #99A9E4

Accessibility & contrast

On white

6.19

#3857CB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.39

#3857CB on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3857CB

6.19:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3857CB	#FFFFFF	#000000	##FFFFFF
##3857CB	1.00	6.19	3.39	6.19
#FFFFFF	6.19	1.00	21.00	1.00
#000000	3.39	21.00	1.00	21.00
##FFFFFF	6.19	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0068CF

Deuteranopia (green-blind)

#005BC9

Tritanopia (blue-blind)

#007488

Achromatopsia (no color)

#616161

Design tokens & code

CSS

--color: #3857cb;
/* rgb */ color: rgb(56, 87, 203);
/* oklch */ color: oklch(50.4% 0.183 267.8);

Tailwind

colors: {
  custom: {
    50: '#8286dc',
    500: '#3857cb',
    950: '#000000',
  },
}

SCSS

$custom: #3857cb;
$custom-light: #8286dc;
$custom-dark: #000000;

JSON

{
  "hex": "#3857cb",
  "rgb": {
    "r": 56,
    "g": 87,
    "b": 203
  },
  "hsl": {
    "h": 227.347,
    "s": 58.566,
    "l": 50.784
  },
  "oklch": {
    "l": 0.50357,
    "c": 0.18335,
    "h": 267.8
  },
  "luminance": 0.11969
}

Semantic roles & 50–950 ramp

primary

#3857CB

secondary

#D0C28F

accent

#C146E2

background

#F8F8FD

surface

#F0EFFB

border

#CBCAD4

text

#0C0B15

muted

#7D7C83

Preview Lab

Preview with #3857CB

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

Preview Lab → · Contrast checker → · Palette generator →