#3739BD#3739BD

#3739BD is a dark, highly saturated blue. Relative luminance 0.074; OKLCH L 43.8% C 0.200 H 273.7°. Best body text is #FFFFFF at 8.46:1 contrast (WCAG AA passes).

Color values

HEX	#3739BD
RGB	rgb(55, 57, 189)
HSL	hsl(239, 55%, 48%)
HSV	hsv(239, 71%, 74%)
CMYK	cmyk(70.9%, 69.8%, 0%, 25.9%)
CIE-LAB	lab(32.73, 42.34, -69.17)
CIE-LCH	lch(32.73, 81.10, 301.47°)
OKLab	oklab(43.77% 0.013 -0.2)
OKLCH	oklch(43.77% 0.2 273.7)
XYZ	xyz(12.2209, 7.4114, 48.9207)
Luminance	0.0741 (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

#3739BD #BDBB37

analogous

#377CBD #3739BD #7837BD

triadic

#3739BD #BD3739 #39BD37

tetradic

#3739BD #BD377C #BDBB37 #37BD78

square

#3739BD #BD377C #BDBB37 #37BD78

split-complementary

#3739BD #BD7837 #7CBD37

monochromatic

#1B1C5E #292B8E #3739BD #6062D1 #9091DF

Accessibility & contrast

On white

8.46

#3739BD on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.48

#3739BD on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3739BD

8.46:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3739BD	#FFFFFF	#000000	##FFFFFF
##3739BD	1.00	8.46	2.48	8.46
#FFFFFF	8.46	1.00	21.00	1.00
#000000	2.48	21.00	1.00	21.00
##FFFFFF	8.46	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0053C1

Deuteranopia (green-blind)

#0047BB

Tritanopia (blue-blind)

#005D77

Achromatopsia (no color)

#4D4D4D

Design tokens & code

CSS

--color: #3739bd;
/* rgb */ color: rgb(55, 57, 189);
/* oklch */ color: oklch(43.8% 0.200 273.7);

Tailwind

colors: {
  custom: {
    50: '#8170d2',
    500: '#3739bd',
    950: '#000000',
  },
}

SCSS

$custom: #3739bd;
$custom-light: #8170d2;
$custom-dark: #000000;

JSON

{
  "hex": "#3739bd",
  "rgb": {
    "r": 55,
    "g": 57,
    "b": 189
  },
  "hsl": {
    "h": 239.104,
    "s": 54.918,
    "l": 47.843
  },
  "oklch": {
    "l": 0.43774,
    "c": 0.20041,
    "h": 273.7
  },
  "luminance": 0.07413
}

Semantic roles & 50–950 ramp

primary

#3739BD

secondary

#C9C886

accent

#DC4ADE

background

#F8F6FD

surface

#F0ECFA

border

#CBC7D3

text

#0C0714

muted

#7D7A83

Preview Lab

Preview with #3739BD

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

Preview Lab → · Contrast checker → · Palette generator →