#3137B9#3137B9

#3137B9 is a dark, vivid blue. Relative luminance 0.069; OKLCH L 42.7% C 0.199 H 272.3°. Best body text is #FFFFFF at 8.83:1 contrast (WCAG AA passes).

Color values

HEX	#3137B9
RGB	rgb(49, 55, 185)
HSL	hsl(237, 58%, 46%)
HSV	hsv(237, 74%, 73%)
CMYK	cmyk(73.5%, 70.3%, 0%, 27.5%)
CIE-LAB	lab(31.55, 41.54, -68.76)
CIE-LCH	lch(31.55, 80.33, 301.13°)
OKLab	oklab(42.72% 0.0079 -0.1989)
OKLCH	oklch(42.72% 0.199 272.3)
XYZ	xyz(11.3868, 6.8870, 46.6187)
Luminance	0.0689 (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

#3137B9 #B9B331

analogous

#317BB9 #3137B9 #6F31B9

triadic

#3137B9 #B93137 #37B931

tetradic

#3137B9 #B9317B #B9B331 #31B96F

square

#3137B9 #B9317B #B9B331 #31B96F

split-complementary

#3137B9 #B96F31 #7BB931

monochromatic

#171A58 #242989 #3137B9 #555BD2 #868ADF

Accessibility & contrast

On white

8.83

#3137B9 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.38

#3137B9 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3137B9

8.83:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3137B9	#FFFFFF	#000000	##FFFFFF
##3137B9	1.00	8.83	2.38	8.83
#FFFFFF	8.83	1.00	21.00	1.00
#000000	2.38	21.00	1.00	21.00
##FFFFFF	8.83	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0051BD

Deuteranopia (green-blind)

#0044B7

Tritanopia (blue-blind)

#005B74

Achromatopsia (no color)

#4A4A4A

Design tokens & code

CSS

--color: #3137b9;
/* rgb */ color: rgb(49, 55, 185);
/* oklch */ color: oklch(42.7% 0.199 272.3);

Tailwind

colors: {
  custom: {
    50: '#7e6fcf',
    500: '#3137b9',
    950: '#000000',
  },
}

SCSS

$custom: #3137b9;
$custom-light: #7e6fcf;
$custom-dark: #000000;

JSON

{
  "hex": "#3137b9",
  "rgb": {
    "r": 49,
    "g": 55,
    "b": 185
  },
  "hsl": {
    "h": 237.353,
    "s": 58.12,
    "l": 45.882
  },
  "oklch": {
    "l": 0.42715,
    "c": 0.19907,
    "h": 272.3
  },
  "luminance": 0.06888
}

Semantic roles & 50–950 ramp

primary

#3137B9

secondary

#C8C57D

accent

#DB46E1

background

#F8F6FC

surface

#F0ECF9

border

#CBC7D2

text

#0B0714

muted

#7C7A82

Preview Lab

Preview with #3137B9

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

Preview Lab → · Contrast checker → · Palette generator →