#3739BE#3739BE

#3739BE is a dark, highly saturated blue. Relative luminance 0.075; OKLCH L 43.9% C 0.202 H 273.7°. Best body text is #FFFFFF at 8.43:1 contrast (WCAG AA passes).

Color values

HEX	#3739BE
RGB	rgb(55, 57, 190)
HSL	hsl(239, 55%, 48%)
HSV	hsv(239, 71%, 75%)
CMYK	cmyk(71.1%, 70%, 0%, 25.5%)
CIE-LAB	lab(32.82, 42.67, -69.60)
CIE-LCH	lch(32.82, 81.64, 301.51°)
OKLab	oklab(43.87% 0.0129 -0.2013)
OKLCH	oklch(43.87% 0.202 273.7)
XYZ	xyz(12.3298, 7.4550, 49.4944)
Luminance	0.0746 (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

#3739BE #BEBC37

analogous

#377CBE #3739BE #7837BE

triadic

#3739BE #BE3739 #39BE37

tetradic

#3739BE #BE377C #BEBC37 #37BE78

square

#3739BE #BE377C #BEBC37 #37BE78

split-complementary

#3739BE #BE7837 #7CBE37

monochromatic

#1C1D5F #292B8F #3739BE #6163D1 #9092DF

Accessibility & contrast

On white

8.43

#3739BE on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.49

#3739BE on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3739BE

8.43:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3739BE	#FFFFFF	#000000	##FFFFFF
##3739BE	1.00	8.43	2.49	8.43
#FFFFFF	8.43	1.00	21.00	1.00
#000000	2.49	21.00	1.00	21.00
##FFFFFF	8.43	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0054C2

Deuteranopia (green-blind)

#0047BC

Tritanopia (blue-blind)

#005E77

Achromatopsia (no color)

#4D4D4D

Design tokens & code

CSS

--color: #3739be;
/* rgb */ color: rgb(55, 57, 190);
/* oklch */ color: oklch(43.9% 0.202 273.7);

Tailwind

colors: {
  custom: {
    50: '#8170d3',
    500: '#3739be',
    950: '#000000',
  },
}

SCSS

$custom: #3739be;
$custom-light: #8170d3;
$custom-dark: #000000;

JSON

{
  "hex": "#3739be",
  "rgb": {
    "r": 55,
    "g": 57,
    "b": 190
  },
  "hsl": {
    "h": 239.111,
    "s": 55.102,
    "l": 48.039
  },
  "oklch": {
    "l": 0.43871,
    "c": 0.20166,
    "h": 273.7
  },
  "luminance": 0.07456
}

Semantic roles & 50–950 ramp

primary

#3739BE

secondary

#CAC987

accent

#DC49DE

background

#F8F6FD

surface

#F0ECFA

border

#CBC7D3

text

#0C0714

muted

#7D7A83

Preview Lab

Preview with #3739BE

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

Preview Lab → · Contrast checker → · Palette generator →