#3739D0#3739D0

#3739D0 is a mid, highly saturated blue. Relative luminance 0.083; OKLCH L 45.7% C 0.224 H 272.6°. Best body text is #FFFFFF at 7.90:1 contrast (WCAG AA passes).

Color values

HEX	#3739D0
RGB	rgb(55, 57, 208)
HSL	hsl(239, 62%, 52%)
HSV	hsv(239, 74%, 82%)
CMYK	cmyk(73.6%, 72.6%, 0%, 18.4%)
CIE-LAB	lab(34.58, 48.65, -77.21)
CIE-LCH	lch(34.58, 91.26, 302.21°)
OKLab	oklab(45.66% 0.0102 -0.2234)
OKLCH	oklch(45.66% 0.224 272.6)
XYZ	xyz(14.4200, 8.2911, 60.5026)
Luminance	0.0829 (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

#3739D0 #D0CE37

analogous

#3786D0 #3739D0 #8237D0

triadic

#3739D0 #D03739 #39D037

tetradic

#3739D0 #D03786 #D0CE37 #37D082

square

#3739D0 #D03786 #D0CE37 #37D082

split-complementary

#3739D0 #D08237 #86D037

monochromatic

#1B1C72 #2628A3 #3739D0 #696ADC #9A9BE7

Accessibility & contrast

On white

7.90

#3739D0 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.66

#3739D0 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3739D0

7.90:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3739D0	#FFFFFF	#000000	##FFFFFF
##3739D0	1.00	7.90	2.66	7.90
#FFFFFF	7.90	1.00	21.00	1.00
#000000	2.66	21.00	1.00	21.00
##FFFFFF	7.90	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0059D4

Deuteranopia (green-blind)

#004ACD

Tritanopia (blue-blind)

#006481

Achromatopsia (no color)

#515151

Design tokens & code

CSS

--color: #3739d0;
/* rgb */ color: rgb(55, 57, 208);
/* oklch */ color: oklch(45.7% 0.224 272.6);

Tailwind

colors: {
  custom: {
    50: '#8571e0',
    500: '#3739d0',
    950: '#000000',
  },
}

SCSS

$custom: #3739d0;
$custom-light: #8571e0;
$custom-dark: #000000;

JSON

{
  "hex": "#3739d0",
  "rgb": {
    "r": 55,
    "g": 57,
    "b": 208
  },
  "hsl": {
    "h": 239.216,
    "s": 61.943,
    "l": 51.569
  },
  "oklch": {
    "l": 0.4566,
    "c": 0.22367,
    "h": 272.6
  },
  "luminance": 0.08293
}

Semantic roles & 50–950 ramp

primary

#3739D0

secondary

#D3D290

accent

#E343E5

background

#F9F6FD

surface

#F1ECFB

border

#CBC7D4

text

#0D0815

muted

#7E7B83

Preview Lab

Preview with #3739D0

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

Preview Lab → · Contrast checker → · Palette generator →