#3739AE#3739AE

#3739AE is a dark, vivid blue. Relative luminance 0.068; OKLCH L 42.3% C 0.181 H 274.7°. Best body text is #FFFFFF at 8.90:1 contrast (WCAG AA passes).

Color values

HEX	#3739AE
RGB	rgb(55, 57, 174)
HSL	hsl(239, 52%, 45%)
HSV	hsv(239, 68%, 68%)
CMYK	cmyk(68.4%, 67.2%, 0%, 31.8%)
CIE-LAB	lab(31.33, 37.23, -62.56)
CIE-LCH	lch(31.33, 72.80, 300.76°)
OKLab	oklab(42.34% 0.0149 -0.1807)
OKLCH	oklch(42.34% 0.181 274.7)
XYZ	xyz(10.6761, 6.7935, 40.7848)
Luminance	0.0679 (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

#3739AE #AEAC37

analogous

#3774AE #3739AE #7137AE

triadic

#3739AE #AE3739 #39AE37

tetradic

#3739AE #AE3774 #AEAC37 #37AE71

square

#3739AE #AE3774 #AEAC37 #37AE71

split-complementary

#3739AE #AE7137 #74AE37

monochromatic

#1A1B51 #282A7F #3739AE #585ACA #8688D9

Accessibility & contrast

On white

8.90

#3739AE on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.36

#3739AE on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3739AE

8.90:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3739AE	#FFFFFF	#000000	##FFFFFF
##3739AE	1.00	8.90	2.36	8.90
#FFFFFF	8.90	1.00	21.00	1.00
#000000	2.36	21.00	1.00	21.00
##FFFFFF	8.90	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004FB2

Deuteranopia (green-blind)

#0044AC

Tritanopia (blue-blind)

#00586E

Achromatopsia (no color)

#4A4A4A

Design tokens & code

CSS

--color: #3739ae;
/* rgb */ color: rgb(55, 57, 174);
/* oklch */ color: oklch(42.3% 0.181 274.7);

Tailwind

colors: {
  custom: {
    50: '#7e70c7',
    500: '#3739ae',
    950: '#000000',
  },
}

SCSS

$custom: #3739ae;
$custom-light: #7e70c7;
$custom-dark: #000000;

JSON

{
  "hex": "#3739ae",
  "rgb": {
    "r": 55,
    "g": 57,
    "b": 174
  },
  "hsl": {
    "h": 238.992,
    "s": 51.965,
    "l": 44.902
  },
  "oklch": {
    "l": 0.42343,
    "c": 0.18127,
    "h": 274.7
  },
  "luminance": 0.06794
}

Semantic roles & 50–950 ramp

primary

#3739AE

secondary

#C3C27E

accent

#D94CDB

background

#F8F6FC

surface

#EFECF8

border

#CAC7D1

text

#0B0713

muted

#7C7A82

Preview Lab

Preview with #3739AE

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

Preview Lab → · Contrast checker → · Palette generator →