#3739C0#3739C0

#3739C0 is a dark, highly saturated blue. Relative luminance 0.075; OKLCH L 44.1% C 0.204 H 273.5°. Best body text is #FFFFFF at 8.37:1 contrast (WCAG AA passes).

Color values

HEX	#3739C0
RGB	rgb(55, 57, 192)
HSL	hsl(239, 55%, 48%)
HSV	hsv(239, 71%, 75%)
CMYK	cmyk(71.4%, 70.3%, 0%, 24.7%)
CIE-LAB	lab(33.01, 43.35, -70.47)
CIE-LCH	lch(33.01, 82.73, 301.60°)
OKLab	oklab(44.07% 0.0126 -0.2038)
OKLCH	oklch(44.07% 0.204 273.5)
XYZ	xyz(12.5499, 7.5430, 50.6535)
Luminance	0.0754 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue Blue

#2242C7

ΔE00 3.37

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3739C0 #C0BE37

analogous

#377DC0 #3739C0 #7937C0

triadic

#3739C0 #C03739 #39C037

tetradic

#3739C0 #C0377D #C0BE37 #37C079

square

#3739C0 #C0377D #C0BE37 #37C079

split-complementary

#3739C0 #C07937 #7DC037

monochromatic

#1C1D61 #292B90 #3739C0 #6264D2 #9293E0

Accessibility & contrast

On white

8.37

#3739C0 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.51

#3739C0 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3739C0

8.37:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3739C0	#FFFFFF	#000000	##FFFFFF
##3739C0	1.00	8.37	2.51	8.37
#FFFFFF	8.37	1.00	21.00	1.00
#000000	2.51	21.00	1.00	21.00
##FFFFFF	8.37	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0054C4

Deuteranopia (green-blind)

#0047BE

Tritanopia (blue-blind)

#005E78

Achromatopsia (no color)

#4E4E4E

Design tokens & code

CSS

--color: #3739c0;
/* rgb */ color: rgb(55, 57, 192);
/* oklch */ color: oklch(44.1% 0.204 273.5);

Tailwind

colors: {
  custom: {
    50: '#8270d4',
    500: '#3739c0',
    950: '#000000',
  },
}

SCSS

$custom: #3739c0;
$custom-light: #8270d4;
$custom-dark: #000000;

JSON

{
  "hex": "#3739c0",
  "rgb": {
    "r": 55,
    "g": 57,
    "b": 192
  },
  "hsl": {
    "h": 239.124,
    "s": 55.466,
    "l": 48.431
  },
  "oklch": {
    "l": 0.44066,
    "c": 0.20415,
    "h": 273.5
  },
  "luminance": 0.07544
}

Semantic roles & 50–950 ramp

primary

#3739C0

secondary

#CBCA88

accent

#DD49DF

background

#F8F6FD

surface

#F0ECFA

border

#CBC7D3

text

#0C0714

muted

#7D7A83

Preview Lab

Preview with #3739C0

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

Preview Lab → · Contrast checker → · Palette generator →