#3837B7#3837B7

#3837B7 is a dark, vivid blue. Relative luminance 0.070; OKLCH L 42.9% C 0.195 H 274.8°. Best body text is #FFFFFF at 8.76:1 contrast (WCAG AA passes).

Color values

HEX	#3837B7
RGB	rgb(56, 55, 183)
HSL	hsl(240, 54%, 47%)
HSV	hsv(240, 70%, 72%)
CMYK	cmyk(69.4%, 69.9%, 0%, 28.2%)
CIE-LAB	lab(31.79, 41.62, -67.17)
CIE-LCH	lch(31.79, 79.02, 301.78°)
OKLab	oklab(42.94% 0.0163 -0.1941)
OKLCH	oklch(42.94% 0.195 274.8)
XYZ	xyz(11.5415, 6.9909, 45.5317)
Luminance	0.0699 (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

#3837B7 #B6B737

analogous

#3776B7 #3837B7 #7837B7

triadic

#3837B7 #B73837 #37B738

tetradic

#3837B7 #B73776 #B6B737 #37B778

square

#3837B7 #B73776 #B6B737 #37B778

split-complementary

#3837B7 #B77837 #76B737

monochromatic

#1B1B59 #2A2988 #3837B7 #5E5DCE #8D8CDC

Accessibility & contrast

On white

8.76

#3837B7 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.40

#3837B7 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3837B7

8.76:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3837B7	#FFFFFF	#000000	##FFFFFF
##3837B7	1.00	8.76	2.40	8.76
#FFFFFF	8.76	1.00	21.00	1.00
#000000	2.40	21.00	1.00	21.00
##FFFFFF	8.76	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0051BB

Deuteranopia (green-blind)

#0045B5

Tritanopia (blue-blind)

#005A73

Achromatopsia (no color)

#4B4B4B

Design tokens & code

CSS

--color: #3837b7;
/* rgb */ color: rgb(56, 55, 183);
/* oklch */ color: oklch(42.9% 0.195 274.8);

Tailwind

colors: {
  custom: {
    50: '#806fce',
    500: '#3837b7',
    950: '#000000',
  },
}

SCSS

$custom: #3837b7;
$custom-light: #806fce;
$custom-dark: #000000;

JSON

{
  "hex": "#3837b7",
  "rgb": {
    "r": 56,
    "g": 55,
    "b": 183
  },
  "hsl": {
    "h": 240.469,
    "s": 53.782,
    "l": 46.667
  },
  "oklch": {
    "l": 0.42942,
    "c": 0.19479,
    "h": 274.8
  },
  "luminance": 0.06992
}

Semantic roles & 50–950 ramp

primary

#3837B7

secondary

#C6C783

accent

#DD4BDC

background

#F8F6FC

surface

#F0ECF9

border

#CBC7D2

text

#0C0714

muted

#7D7A82

Preview Lab

Preview with #3837B7

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

Preview Lab → · Contrast checker → · Palette generator →