#3137B1#3137B1

#3137B1 is a dark, vivid blue. Relative luminance 0.066; OKLCH L 41.9% C 0.189 H 272.7°. Best body text is #FFFFFF at 9.08:1 contrast (WCAG AA passes).

Color values

HEX	#3137B1
RGB	rgb(49, 55, 177)
HSL	hsl(237, 57%, 44%)
HSV	hsv(237, 72%, 69%)
CMYK	cmyk(72.3%, 68.9%, 0%, 30.6%)
CIE-LAB	lab(30.78, 38.78, -65.27)
CIE-LCH	lch(30.78, 75.92, 300.71°)
OKLab	oklab(41.93% 0.0088 -0.1887)
OKLCH	oklch(41.93% 0.189 272.7)
XYZ	xyz(10.5660, 6.5586, 42.2955)
Luminance	0.0656 (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

#3137B1 #B1AB31

analogous

#3177B1 #3137B1 #6B31B1

triadic

#3137B1 #B13137 #37B131

tetradic

#3137B1 #B13177 #B1AB31 #31B16B

square

#3137B1 #B13177 #B1AB31 #31B16B

split-complementary

#3137B1 #B16B31 #77B131

monochromatic

#161951 #242881 #3137B1 #5156CF #8085DC

Accessibility & contrast

On white

9.08

#3137B1 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.31

#3137B1 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3137B1

9.08:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3137B1	#FFFFFF	#000000	##FFFFFF
##3137B1	1.00	9.08	2.31	9.08
#FFFFFF	9.08	1.00	21.00	1.00
#000000	2.31	21.00	1.00	21.00
##FFFFFF	9.08	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004EB5

Deuteranopia (green-blind)

#0042AF

Tritanopia (blue-blind)

#00586F

Achromatopsia (no color)

#484848

Design tokens & code

CSS

--color: #3137b1;
/* rgb */ color: rgb(49, 55, 177);
/* oklch */ color: oklch(41.9% 0.189 272.7);

Tailwind

colors: {
  custom: {
    50: '#7c6ec9',
    500: '#3137b1',
    950: '#000000',
  },
}

SCSS

$custom: #3137b1;
$custom-light: #7c6ec9;
$custom-dark: #000000;

JSON

{
  "hex": "#3137b1",
  "rgb": {
    "r": 49,
    "g": 55,
    "b": 177
  },
  "hsl": {
    "h": 237.188,
    "s": 56.637,
    "l": 44.314
  },
  "oklch": {
    "l": 0.41929,
    "c": 0.18895,
    "h": 272.7
  },
  "luminance": 0.0656
}

Semantic roles & 50–950 ramp

primary

#3137B1

secondary

#C5C179

accent

#D948E0

background

#F8F6FC

surface

#EFECF8

border

#CAC7D1

text

#0B0713

muted

#7C7A82

Preview Lab

Preview with #3137B1

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

Preview Lab → · Contrast checker → · Palette generator →