#3137AA#3137AA

#3137AA is a dark, vivid blue. Relative luminance 0.063; OKLCH L 41.3% C 0.180 H 273.1°. Best body text is #FFFFFF at 9.30:1 contrast (WCAG AA passes).

Color values

HEX	#3137AA
RGB	rgb(49, 55, 170)
HSL	hsl(237, 55%, 43%)
HSV	hsv(237, 71%, 67%)
CMYK	cmyk(71.2%, 67.6%, 0%, 33.3%)
CIE-LAB	lab(30.12, 36.33, -62.16)
CIE-LCH	lch(30.12, 72.00, 300.30°)
OKLab	oklab(41.25% 0.0096 -0.1796)
OKLCH	oklch(41.25% 0.18 273.1)
XYZ	xyz(9.8861, 6.2867, 38.7149)
Luminance	0.0629 (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

#3137AA #AAA431

analogous

#3173AA #3137AA #6831AA

triadic

#3137AA #AA3137 #37AA31

tetradic

#3137AA #AA3173 #AAA431 #31AA68

square

#3137AA #AA3173 #AAA431 #31AA68

split-complementary

#3137AA #AA6831 #73AA31

monochromatic

#16184B #23287A #3137AA #4D53CC #7C81D9

Accessibility & contrast

On white

9.30

#3137AA on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.26

#3137AA on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3137AA

9.30:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3137AA	#FFFFFF	#000000	##FFFFFF
##3137AA	1.00	9.30	2.26	9.30
#FFFFFF	9.30	1.00	21.00	1.00
#000000	2.26	21.00	1.00	21.00
##FFFFFF	9.30	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004DAE

Deuteranopia (green-blind)

#0041A8

Tritanopia (blue-blind)

#00566C

Achromatopsia (no color)

#474747

Design tokens & code

CSS

--color: #3137aa;
/* rgb */ color: rgb(49, 55, 170);
/* oklch */ color: oklch(41.3% 0.180 273.1);

Tailwind

colors: {
  custom: {
    50: '#7a6ec4',
    500: '#3137aa',
    950: '#000000',
  },
}

SCSS

$custom: #3137aa;
$custom-light: #7a6ec4;
$custom-dark: #000000;

JSON

{
  "hex": "#3137aa",
  "rgb": {
    "r": 49,
    "g": 55,
    "b": 170
  },
  "hsl": {
    "h": 237.025,
    "s": 55.251,
    "l": 42.941
  },
  "oklch": {
    "l": 0.41254,
    "c": 0.17991,
    "h": 273.1
  },
  "luminance": 0.06288
}

Semantic roles & 50–950 ramp

primary

#3137AA

secondary

#C2BE75

accent

#D749DF

background

#F8F6FC

surface

#EFECF8

border

#CAC7D1

text

#0B0713

muted

#7C7A82

Preview Lab

Preview with #3137AA

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

Preview Lab → · Contrast checker → · Palette generator →