#3739AF#3739AF

#3739AF is a dark, vivid blue. Relative luminance 0.068; OKLCH L 42.4% C 0.183 H 274.6°. Best body text is #FFFFFF at 8.87:1 contrast (WCAG AA passes).

Color values

HEX	#3739AF
RGB	rgb(55, 57, 175)
HSL	hsl(239, 52%, 45%)
HSV	hsv(239, 69%, 69%)
CMYK	cmyk(68.6%, 67.4%, 0%, 31.4%)
CIE-LAB	lab(31.42, 37.57, -63.01)
CIE-LCH	lch(31.42, 73.36, 300.81°)
OKLab	oklab(42.44% 0.0148 -0.182)
OKLCH	oklch(42.44% 0.183 274.6)
XYZ	xyz(10.7740, 6.8326, 41.3002)
Luminance	0.0683 (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

#3739AF #AFAD37

analogous

#3775AF #3739AF #7137AF

triadic

#3739AF #AF3739 #39AF37

tetradic

#3739AF #AF3775 #AFAD37 #37AF71

square

#3739AF #AF3775 #AFAD37 #37AF71

split-complementary

#3739AF #AF7137 #75AF37

monochromatic

#1A1B52 #282A80 #3739AF #595ACB #8788D9

Accessibility & contrast

On white

8.87

#3739AF on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.37

#3739AF on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3739AF

8.87:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3739AF	#FFFFFF	#000000	##FFFFFF
##3739AF	1.00	8.87	2.37	8.87
#FFFFFF	8.87	1.00	21.00	1.00
#000000	2.37	21.00	1.00	21.00
##FFFFFF	8.87	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004FB3

Deuteranopia (green-blind)

#0044AD

Tritanopia (blue-blind)

#00586F

Achromatopsia (no color)

#4A4A4A

Design tokens & code

CSS

--color: #3739af;
/* rgb */ color: rgb(55, 57, 175);
/* oklch */ color: oklch(42.4% 0.183 274.6);

Tailwind

colors: {
  custom: {
    50: '#7e70c8',
    500: '#3739af',
    950: '#000000',
  },
}

SCSS

$custom: #3739af;
$custom-light: #7e70c8;
$custom-dark: #000000;

JSON

{
  "hex": "#3739af",
  "rgb": {
    "r": 55,
    "g": 57,
    "b": 175
  },
  "hsl": {
    "h": 239,
    "s": 52.174,
    "l": 45.098
  },
  "oklch": {
    "l": 0.42436,
    "c": 0.18257,
    "h": 274.6
  },
  "luminance": 0.06834
}

Semantic roles & 50–950 ramp

primary

#3739AF

secondary

#C3C27F

accent

#D94CDC

background

#F8F6FC

surface

#EFECF8

border

#CAC7D1

text

#0B0713

muted

#7C7A82

Preview Lab

Preview with #3739AF

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

Preview Lab → · Contrast checker → · Palette generator →