#3137CF#3137CF

#3137CF is a dark, highly saturated blue. Relative luminance 0.079; OKLCH L 44.9% C 0.226 H 271.2°. Best body text is #FFFFFF at 8.15:1 contrast (WCAG AA passes).

Color values

HEX	#3137CF
RGB	rgb(49, 55, 207)
HSL	hsl(238, 62%, 50%)
HSV	hsv(238, 76%, 81%)
CMYK	cmyk(76.3%, 73.4%, 0%, 18.8%)
CIE-LAB	lab(33.75, 48.93, -78.02)
CIE-LCH	lch(33.75, 92.09, 302.10°)
OKLab	oklab(44.95% 0.0047 -0.2259)
OKLCH	oklch(44.95% 0.226 271.2)
XYZ	xyz(13.8915, 7.8888, 59.8100)
Luminance	0.0789 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue Blue

#2242C7

ΔE00 3.64

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3137CF #CFC931

analogous

#3186CF #3137CF #7A31CF

triadic

#3137CF #CF3137 #37CF31

tetradic

#3137CF #CF3186 #CFC931 #31CF7A

square

#3137CF #CF3186 #CFC931 #31CF7A

split-complementary

#3137CF #CF7A31 #86CF31

monochromatic

#191C6C #25299E #3137CF #6367DB #9497E6

Accessibility & contrast

On white

8.15

#3137CF on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.58

#3137CF on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3137CF

8.15:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3137CF	#FFFFFF	#000000	##FFFFFF
##3137CF	1.00	8.15	2.58	8.15
#FFFFFF	8.15	1.00	21.00	1.00
#000000	2.58	21.00	1.00	21.00
##FFFFFF	8.15	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0057D3

Deuteranopia (green-blind)

#0047CC

Tritanopia (blue-blind)

#006380

Achromatopsia (no color)

#4F4F4F

Design tokens & code

CSS

--color: #3137cf;
/* rgb */ color: rgb(49, 55, 207);
/* oklch */ color: oklch(44.9% 0.226 271.2);

Tailwind

colors: {
  custom: {
    50: '#836fdf',
    500: '#3137cf',
    950: '#000000',
  },
}

SCSS

$custom: #3137cf;
$custom-light: #836fdf;
$custom-dark: #000000;

JSON

{
  "hex": "#3137cf",
  "rgb": {
    "r": 49,
    "g": 55,
    "b": 207
  },
  "hsl": {
    "h": 237.722,
    "s": 62.205,
    "l": 50.196
  },
  "oklch": {
    "l": 0.44949,
    "c": 0.22594,
    "h": 271.2
  },
  "luminance": 0.0789
}

Semantic roles & 50–950 ramp

primary

#3137CF

secondary

#D1CF8B

accent

#DF43E5

background

#F9F6FD

surface

#F1ECFB

border

#CBC7D4

text

#0D0715

muted

#7E7A83

Preview Lab

Preview with #3137CF

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

Preview Lab → · Contrast checker → · Palette generator →