#3137BF#3137BF

#3137BF is a dark, highly saturated blue. Relative luminance 0.071; OKLCH L 43.3% C 0.207 H 272.0°. Best body text is #FFFFFF at 8.64:1 contrast (WCAG AA passes).

Color values

HEX	#3137BF
RGB	rgb(49, 55, 191)
HSL	hsl(237, 59%, 47%)
HSV	hsv(237, 74%, 75%)
CMYK	cmyk(74.3%, 71.2%, 0%, 25.1%)
CIE-LAB	lab(32.14, 43.58, -71.33)
CIE-LCH	lch(32.14, 83.59, 301.42°)
OKLab	oklab(43.31% 0.007 -0.2064)
OKLCH	oklch(43.31% 0.207 272)
XYZ	xyz(12.0336, 7.1457, 50.0252)
Luminance	0.0715 (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

#3137BF #BFB931

analogous

#317EBF #3137BF #7231BF

triadic

#3137BF #BF3137 #37BF31

tetradic

#3137BF #BF317E #BFB931 #31BF72

square

#3137BF #BF317E #BFB931 #31BF72

split-complementary

#3137BF #BF7231 #7EBF31

monochromatic

#181B5E #25298E #3137BF #595ED4 #8A8DE1

Accessibility & contrast

On white

8.64

#3137BF on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.43

#3137BF on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3137BF

8.64:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3137BF	#FFFFFF	#000000	##FFFFFF
##3137BF	1.00	8.64	2.43	8.64
#FFFFFF	8.64	1.00	21.00	1.00
#000000	2.43	21.00	1.00	21.00
##FFFFFF	8.64	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0052C3

Deuteranopia (green-blind)

#0045BD

Tritanopia (blue-blind)

#005D77

Achromatopsia (no color)

#4C4C4C

Design tokens & code

CSS

--color: #3137bf;
/* rgb */ color: rgb(49, 55, 191);
/* oklch */ color: oklch(43.3% 0.207 272.0);

Tailwind

colors: {
  custom: {
    50: '#7f6fd4',
    500: '#3137bf',
    950: '#000000',
  },
}

SCSS

$custom: #3137bf;
$custom-light: #7f6fd4;
$custom-dark: #000000;

JSON

{
  "hex": "#3137bf",
  "rgb": {
    "r": 49,
    "g": 55,
    "b": 191
  },
  "hsl": {
    "h": 237.465,
    "s": 59.167,
    "l": 47.059
  },
  "oklch": {
    "l": 0.43314,
    "c": 0.20654,
    "h": 272
  },
  "luminance": 0.07147
}

Semantic roles & 50–950 ramp

primary

#3137BF

secondary

#CBC881

accent

#DC45E2

background

#F8F6FD

surface

#F0ECFA

border

#CBC7D3

text

#0C0714

muted

#7D7A83

Preview Lab

Preview with #3137BF

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

Preview Lab → · Contrast checker → · Palette generator →