#3A37BB#3A37BB

#3A37BB is a dark, vivid blue. Relative luminance 0.072; OKLCH L 43.5% C 0.199 H 275.2°. Best body text is #FFFFFF at 8.59:1 contrast (WCAG AA passes).

Color values

HEX	#3A37BB
RGB	rgb(58, 55, 187)
HSL	hsl(241, 55%, 47%)
HSV	hsv(241, 71%, 73%)
CMYK	cmyk(69%, 70.6%, 0%, 26.7%)
CIE-LAB	lab(32.30, 43.19, -68.69)
CIE-LCH	lch(32.30, 81.13, 302.16°)
OKLab	oklab(43.46% 0.0181 -0.1985)
OKLCH	oklch(43.46% 0.199 275.2)
XYZ	xyz(12.0778, 7.2187, 47.7609)
Luminance	0.0722 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Sapphire (survey)

#2138AB

ΔE00 3.77

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3A37BB #B8BB37

analogous

#3776BB #3A37BB #7C37BB

triadic

#3A37BB #BB3A37 #37BB3A

tetradic

#3A37BB #BB3776 #B8BB37 #37BB7C

square

#3A37BB #BB3776 #B8BB37 #37BB7C

split-complementary

#3A37BB #BB7C37 #76BB37

monochromatic

#1D1B5C #2B298C #3A37BB #625FD0 #908EDE

Accessibility & contrast

On white

8.59

#3A37BB on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.44

#3A37BB on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3A37BB

8.59:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3A37BB	#FFFFFF	#000000	##FFFFFF
##3A37BB	1.00	8.59	2.44	8.59
#FFFFFF	8.59	1.00	21.00	1.00
#000000	2.44	21.00	1.00	21.00
##FFFFFF	8.59	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0052BF

Deuteranopia (green-blind)

#0046B9

Tritanopia (blue-blind)

#005B75

Achromatopsia (no color)

#4C4C4C

Design tokens & code

CSS

--color: #3a37bb;
/* rgb */ color: rgb(58, 55, 187);
/* oklch */ color: oklch(43.5% 0.199 275.2);

Tailwind

colors: {
  custom: {
    50: '#826fd1',
    500: '#3a37bb',
    950: '#000000',
  },
}

SCSS

$custom: #3a37bb;
$custom-light: #826fd1;
$custom-dark: #000000;

JSON

{
  "hex": "#3a37bb",
  "rgb": {
    "r": 58,
    "g": 55,
    "b": 187
  },
  "hsl": {
    "h": 241.364,
    "s": 54.545,
    "l": 47.451
  },
  "oklch": {
    "l": 0.43461,
    "c": 0.19931,
    "h": 275.2
  },
  "luminance": 0.0722
}

Semantic roles & 50–950 ramp

primary

#3A37BB

secondary

#C7C985

accent

#DE4ADB

background

#F8F6FD

surface

#F0ECFA

border

#CBC7D3

text

#0C0714

muted

#7D7A83

Preview Lab

Preview with #3A37BB

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

Preview Lab → · Contrast checker → · Palette generator →