#3F37AE#3F37AE

#3F37AE is a dark, vivid blue. Relative luminance 0.068; OKLCH L 42.6% C 0.182 H 278.3°. Best body text is #FFFFFF at 8.86:1 contrast (WCAG AA passes).

Color values

HEX	#3F37AE
RGB	rgb(63, 55, 174)
HSL	hsl(244, 52%, 45%)
HSV	hsv(244, 68%, 68%)
CMYK	cmyk(63.8%, 68.4%, 0%, 31.8%)
CIE-LAB	lab(31.45, 39.53, -62.35)
CIE-LCH	lch(31.45, 73.83, 302.38°)
OKLab	oklab(42.57% 0.0264 -0.1798)
OKLCH	oklch(42.57% 0.182 278.3)
XYZ	xyz(11.0536, 6.8443, 40.7748)
Luminance	0.0684 (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

#3F37AE #A6AE37

analogous

#376AAE #3F37AE #7B37AE

triadic

#3F37AE #AE3F37 #37AE3F

tetradic

#3F37AE #AE376A #A6AE37 #37AE7B

square

#3F37AE #AE376A #A6AE37 #37AE7B

split-complementary

#3F37AE #AE7B37 #6AAE37

monochromatic

#1D1A51 #2E287F #3F37AE #6058CA #8C86D9

Accessibility & contrast

On white

8.86

#3F37AE on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.37

#3F37AE on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F37AE

8.86:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F37AE	#FFFFFF	#000000	##FFFFFF
##3F37AE	1.00	8.86	2.37	8.86
#FFFFFF	8.86	1.00	21.00	1.00
#000000	2.37	21.00	1.00	21.00
##FFFFFF	8.86	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004FB2

Deuteranopia (green-blind)

#0045AC

Tritanopia (blue-blind)

#00566E

Achromatopsia (no color)

#4A4A4A

Design tokens & code

CSS

--color: #3f37ae;
/* rgb */ color: rgb(63, 55, 174);
/* oklch */ color: oklch(42.6% 0.182 278.3);

Tailwind

colors: {
  custom: {
    50: '#816fc7',
    500: '#3f37ae',
    950: '#000000',
  },
}

SCSS

$custom: #3f37ae;
$custom-light: #816fc7;
$custom-dark: #000000;

JSON

{
  "hex": "#3f37ae",
  "rgb": {
    "r": 63,
    "g": 55,
    "b": 174
  },
  "hsl": {
    "h": 244.034,
    "s": 51.965,
    "l": 44.902
  },
  "oklch": {
    "l": 0.42574,
    "c": 0.18174,
    "h": 278.3
  },
  "luminance": 0.06845
}

Semantic roles & 50–950 ramp

primary

#3F37AE

secondary

#BEC37E

accent

#DB4CD2

background

#F8F6FC

surface

#F0ECF8

border

#CBC7D1

text

#0C0713

muted

#7D7A82

Preview Lab

Preview with #3F37AE

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

Preview Lab → · Contrast checker → · Palette generator →