#3137B0#3137B0

#3137B0 is a dark, vivid blue. Relative luminance 0.065; OKLCH L 41.8% C 0.188 H 272.7°. Best body text is #FFFFFF at 9.11:1 contrast (WCAG AA passes).

Color values

HEX	#3137B0
RGB	rgb(49, 55, 176)
HSL	hsl(237, 56%, 44%)
HSV	hsv(237, 72%, 69%)
CMYK	cmyk(72.2%, 68.8%, 0%, 31%)
CIE-LAB	lab(30.69, 38.43, -64.83)
CIE-LCH	lch(30.69, 75.37, 300.66°)
OKLab	oklab(41.83% 0.009 -0.1874)
OKLCH	oklch(41.83% 0.188 272.7)
XYZ	xyz(10.4667, 6.5189, 41.7725)
Luminance	0.0652 (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

#3137B0 #B0AA31

analogous

#3177B0 #3137B0 #6B31B0

triadic

#3137B0 #B03137 #37B031

tetradic

#3137B0 #B03177 #B0AA31 #31B06B

square

#3137B0 #B03177 #B0AA31 #31B06B

split-complementary

#3137B0 #B06B31 #77B031

monochromatic

#161950 #242880 #3137B0 #5056CE #8084DC

Accessibility & contrast

On white

9.11

#3137B0 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.30

#3137B0 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3137B0

9.11:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3137B0	#FFFFFF	#000000	##FFFFFF
##3137B0	1.00	9.11	2.30	9.11
#FFFFFF	9.11	1.00	21.00	1.00
#000000	2.30	21.00	1.00	21.00
##FFFFFF	9.11	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004EB4

Deuteranopia (green-blind)

#0042AE

Tritanopia (blue-blind)

#00586F

Achromatopsia (no color)

#484848

Design tokens & code

CSS

--color: #3137b0;
/* rgb */ color: rgb(49, 55, 176);
/* oklch */ color: oklch(41.8% 0.188 272.7);

Tailwind

colors: {
  custom: {
    50: '#7c6ec9',
    500: '#3137b0',
    950: '#000000',
  },
}

SCSS

$custom: #3137b0;
$custom-light: #7c6ec9;
$custom-dark: #000000;

JSON

{
  "hex": "#3137b0",
  "rgb": {
    "r": 49,
    "g": 55,
    "b": 176
  },
  "hsl": {
    "h": 237.165,
    "s": 56.444,
    "l": 44.118
  },
  "oklch": {
    "l": 0.41831,
    "c": 0.18766,
    "h": 272.7
  },
  "luminance": 0.0652
}

Semantic roles & 50–950 ramp

primary

#3137B0

secondary

#C5C178

accent

#D948E0

background

#F8F6FC

surface

#EFECF8

border

#CAC7D1

text

#0B0713

muted

#7C7A82

Preview Lab

Preview with #3137B0

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

Preview Lab → · Contrast checker → · Palette generator →