#3137B5#3137B5

#3137B5 is a dark, vivid blue. Relative luminance 0.067; OKLCH L 42.3% C 0.194 H 272.5°. Best body text is #FFFFFF at 8.96:1 contrast (WCAG AA passes).

Color values

HEX	#3137B5
RGB	rgb(49, 55, 181)
HSL	hsl(237, 57%, 45%)
HSV	hsv(237, 73%, 71%)
CMYK	cmyk(72.9%, 69.6%, 0%, 29%)
CIE-LAB	lab(31.16, 40.16, -67.03)
CIE-LCH	lch(31.16, 78.14, 300.93°)
OKLab	oklab(42.32% 0.0084 -0.1939)
OKLCH	oklch(42.32% 0.194 272.5)
XYZ	xyz(10.9705, 6.7204, 44.4261)
Luminance	0.0672 (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

#3137B5 #B5AF31

analogous

#3179B5 #3137B5 #6D31B5

triadic

#3137B5 #B53137 #37B531

tetradic

#3137B5 #B53179 #B5AF31 #31B56D

square

#3137B5 #B53179 #B5AF31 #31B56D

split-complementary

#3137B5 #B56D31 #79B531

monochromatic

#171A55 #242885 #3137B5 #5359D0 #8387DD

Accessibility & contrast

On white

8.96

#3137B5 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.34

#3137B5 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3137B5

8.96:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3137B5	#FFFFFF	#000000	##FFFFFF
##3137B5	1.00	8.96	2.34	8.96
#FFFFFF	8.96	1.00	21.00	1.00
#000000	2.34	21.00	1.00	21.00
##FFFFFF	8.96	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0050B9

Deuteranopia (green-blind)

#0043B3

Tritanopia (blue-blind)

#005A72

Achromatopsia (no color)

#494949

Design tokens & code

CSS

--color: #3137b5;
/* rgb */ color: rgb(49, 55, 181);
/* oklch */ color: oklch(42.3% 0.194 272.5);

Tailwind

colors: {
  custom: {
    50: '#7d6ecc',
    500: '#3137b5',
    950: '#000000',
  },
}

SCSS

$custom: #3137b5;
$custom-light: #7d6ecc;
$custom-dark: #000000;

JSON

{
  "hex": "#3137b5",
  "rgb": {
    "r": 49,
    "g": 55,
    "b": 181
  },
  "hsl": {
    "h": 237.273,
    "s": 57.391,
    "l": 45.098
  },
  "oklch": {
    "l": 0.4232,
    "c": 0.19404,
    "h": 272.5
  },
  "luminance": 0.06722
}

Semantic roles & 50–950 ramp

primary

#3137B5

secondary

#C7C37B

accent

#DA47E1

background

#F8F6FC

surface

#EFECF9

border

#CAC7D2

text

#0B0714

muted

#7C7A82

Preview Lab

Preview with #3137B5

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

Preview Lab → · Contrast checker → · Palette generator →