#3837CC#3837CC

#3837CC is a mid, highly saturated blue. Relative luminance 0.079; OKLCH L 45.0% C 0.221 H 273.4°. Best body text is #FFFFFF at 8.12:1 contrast (WCAG AA passes).

Color values

HEX	#3837CC
RGB	rgb(56, 55, 204)
HSL	hsl(240, 59%, 51%)
HSV	hsv(240, 73%, 80%)
CMYK	cmyk(72.5%, 73%, 0%, 20%)
CIE-LAB	lab(33.84, 48.55, -76.12)
CIE-LCH	lch(33.84, 90.28, 302.53°)
OKLab	oklab(45.03% 0.0129 -0.2202)
OKLCH	oklch(45.03% 0.221 273.4)
XYZ	xyz(13.8925, 7.9314, 57.9138)
Luminance	0.0793 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3837CC #CBCC37

analogous

#3780CC #3837CC #8237CC

triadic

#3837CC #CC3837 #37CC38

tetradic

#3837CC #CC3780 #CBCC37 #37CC82

square

#3837CC #CC3780 #CBCC37 #37CC82

split-complementary

#3837CC #CC8237 #80CC37

monochromatic

#1C1C6D #29289E #3837CC #6968D8 #9999E5

Accessibility & contrast

On white

8.12

#3837CC on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.59

#3837CC on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3837CC

8.12:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3837CC	#FFFFFF	#000000	##FFFFFF
##3837CC	1.00	8.12	2.59	8.12
#FFFFFF	8.12	1.00	21.00	1.00
#000000	2.59	21.00	1.00	21.00
##FFFFFF	8.12	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0057D0

Deuteranopia (green-blind)

#0048C9

Tritanopia (blue-blind)

#00627E

Achromatopsia (no color)

#505050

Design tokens & code

CSS

--color: #3837cc;
/* rgb */ color: rgb(56, 55, 204);
/* oklch */ color: oklch(45.0% 0.221 273.4);

Tailwind

colors: {
  custom: {
    50: '#8570dd',
    500: '#3837cc',
    950: '#000000',
  },
}

SCSS

$custom: #3837cc;
$custom-light: #8570dd;
$custom-dark: #000000;

JSON

{
  "hex": "#3837cc",
  "rgb": {
    "r": 56,
    "g": 55,
    "b": 204
  },
  "hsl": {
    "h": 240.403,
    "s": 59.363,
    "l": 50.784
  },
  "oklch": {
    "l": 0.45028,
    "c": 0.22058,
    "h": 273.4
  },
  "luminance": 0.07933
}

Semantic roles & 50–950 ramp

primary

#3837CC

secondary

#D0D08E

accent

#E345E1

background

#F9F6FD

surface

#F1ECFB

border

#CBC7D4

text

#0D0715

muted

#7E7A83

Preview Lab

Preview with #3837CC

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

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