#3739C6#3739C6

#3739C6 is a dark, highly saturated blue. Relative luminance 0.078; OKLCH L 44.7% C 0.212 H 273.2°. Best body text is #FFFFFF at 8.19:1 contrast (WCAG AA passes).

Color values

HEX	#3739C6
RGB	rgb(55, 57, 198)
HSL	hsl(239, 57%, 50%)
HSV	hsv(239, 72%, 78%)
CMYK	cmyk(72.2%, 71.2%, 0%, 22.4%)
CIE-LAB	lab(33.59, 45.35, -73.02)
CIE-LCH	lch(33.59, 85.96, 301.84°)
OKLab	oklab(44.66% 0.0117 -0.2112)
OKLCH	oklch(44.66% 0.212 273.2)
XYZ	xyz(13.2283, 7.8144, 54.2263)
Luminance	0.0782 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue Blue

#2242C7

ΔE00 3.32

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3739C6 #C6C437

analogous

#3781C6 #3739C6 #7D37C6

triadic

#3739C6 #C63739 #39C637

tetradic

#3739C6 #C63781 #C6C437 #37C67D

square

#3739C6 #C63781 #C6C437 #37C67D

split-complementary

#3739C6 #C67D37 #81C637

monochromatic

#1C1D66 #2A2B96 #3739C6 #6667D4 #9697E2

Accessibility & contrast

On white

8.19

#3739C6 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.56

#3739C6 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3739C6

8.19:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3739C6	#FFFFFF	#000000	##FFFFFF
##3739C6	1.00	8.19	2.56	8.19
#FFFFFF	8.19	1.00	21.00	1.00
#000000	2.56	21.00	1.00	21.00
##FFFFFF	8.19	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0056CA

Deuteranopia (green-blind)

#0048C3

Tritanopia (blue-blind)

#00617C

Achromatopsia (no color)

#4F4F4F

Design tokens & code

CSS

--color: #3739c6;
/* rgb */ color: rgb(55, 57, 198);
/* oklch */ color: oklch(44.7% 0.212 273.2);

Tailwind

colors: {
  custom: {
    50: '#8371d9',
    500: '#3739c6',
    950: '#000000',
  },
}

SCSS

$custom: #3739c6;
$custom-light: #8371d9;
$custom-dark: #000000;

JSON

{
  "hex": "#3739c6",
  "rgb": {
    "r": 55,
    "g": 57,
    "b": 198
  },
  "hsl": {
    "h": 239.161,
    "s": 56.522,
    "l": 49.608
  },
  "oklch": {
    "l": 0.44658,
    "c": 0.21155,
    "h": 273.2
  },
  "luminance": 0.07816
}

Semantic roles & 50–950 ramp

primary

#3739C6

secondary

#CDCC8C

accent

#DE48E0

background

#F8F6FD

surface

#F0ECFB

border

#CBC7D4

text

#0C0815

muted

#7D7B83

Preview Lab

Preview with #3739C6

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

Preview Lab → · Contrast checker → · Palette generator →