#3739BF#3739BF

#3739BF is a dark, highly saturated blue. Relative luminance 0.075; OKLCH L 44.0% C 0.203 H 273.6°. Best body text is #FFFFFF at 8.40:1 contrast (WCAG AA passes).

Color values

HEX	#3739BF
RGB	rgb(55, 57, 191)
HSL	hsl(239, 55%, 48%)
HSV	hsv(239, 71%, 75%)
CMYK	cmyk(71.2%, 70.2%, 0%, 25.1%)
CIE-LAB	lab(32.92, 43.01, -70.04)
CIE-LCH	lch(32.92, 82.19, 301.56°)
OKLab	oklab(43.97% 0.0127 -0.2025)
OKLCH	oklch(43.97% 0.203 273.6)
XYZ	xyz(12.4395, 7.4988, 50.0720)
Luminance	0.0750 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue Blue

#2242C7

ΔE00 3.40

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3739BF #BFBD37

analogous

#377DBF #3739BF #7937BF

triadic

#3739BF #BF3739 #39BF37

tetradic

#3739BF #BF377D #BFBD37 #37BF79

square

#3739BF #BF377D #BFBD37 #37BF79

split-complementary

#3739BF #BF7937 #7DBF37

monochromatic

#1C1D60 #292B8F #3739BF #6263D2 #9192DF

Accessibility & contrast

On white

8.40

#3739BF on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.50

#3739BF on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3739BF

8.40:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3739BF	#FFFFFF	#000000	##FFFFFF
##3739BF	1.00	8.40	2.50	8.40
#FFFFFF	8.40	1.00	21.00	1.00
#000000	2.50	21.00	1.00	21.00
##FFFFFF	8.40	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0054C3

Deuteranopia (green-blind)

#0047BD

Tritanopia (blue-blind)

#005E78

Achromatopsia (no color)

#4D4D4D

Design tokens & code

CSS

--color: #3739bf;
/* rgb */ color: rgb(55, 57, 191);
/* oklch */ color: oklch(44.0% 0.203 273.6);

Tailwind

colors: {
  custom: {
    50: '#8170d4',
    500: '#3739bf',
    950: '#000000',
  },
}

SCSS

$custom: #3739bf;
$custom-light: #8170d4;
$custom-dark: #000000;

JSON

{
  "hex": "#3739bf",
  "rgb": {
    "r": 55,
    "g": 57,
    "b": 191
  },
  "hsl": {
    "h": 239.118,
    "s": 55.285,
    "l": 48.235
  },
  "oklch": {
    "l": 0.43969,
    "c": 0.20291,
    "h": 273.6
  },
  "luminance": 0.075
}

Semantic roles & 50–950 ramp

primary

#3739BF

secondary

#CAC988

accent

#DC49DF

background

#F8F6FD

surface

#F0ECFA

border

#CBC7D3

text

#0C0714

muted

#7D7A83

Preview Lab

Preview with #3739BF

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

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