#3739DA#3739DA

#3739DA is a mid, highly saturated blue. Relative luminance 0.088; OKLCH L 46.7% C 0.236 H 272.1°. Best body text is #FFFFFF at 7.61:1 contrast (WCAG AA passes).

Color values

HEX	#3739DA
RGB	rgb(55, 57, 218)
HSL	hsl(239, 69%, 54%)
HSV	hsv(239, 75%, 85%)
CMYK	cmyk(74.8%, 73.9%, 0%, 14.5%)
CIE-LAB	lab(35.59, 51.89, -81.32)
CIE-LCH	lch(35.59, 96.46, 302.54°)
OKLab	oklab(46.68% 0.0085 -0.2354)
OKLCH	oklch(46.68% 0.236 272.1)
XYZ	xyz(15.6893, 8.7988, 67.1875)
Luminance	0.0880 (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

#3739DA #DAD837

analogous

#378ADA #3739DA #8637DA

triadic

#3739DA #DA3739 #39DA37

tetradic

#3739DA #DA378A #DAD837 #37DA86

square

#3739DA #DA378A #DAD837 #37DA86

split-complementary

#3739DA #DA8637 #8ADA37

monochromatic

#18197F #2123B3 #3739DA #6B6CE4 #9E9FED

Accessibility & contrast

On white

7.61

#3739DA on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.76

#3739DA on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3739DA

7.61:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3739DA	#FFFFFF	#000000	##FFFFFF
##3739DA	1.00	7.61	2.76	7.61
#FFFFFF	7.61	1.00	21.00	1.00
#000000	2.76	21.00	1.00	21.00
##FFFFFF	7.61	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005CDF

Deuteranopia (green-blind)

#004CD7

Tritanopia (blue-blind)

#006887

Achromatopsia (no color)

#545454

Design tokens & code

CSS

--color: #3739da;
/* rgb */ color: rgb(55, 57, 218);
/* oklch */ color: oklch(46.7% 0.236 272.1);

Tailwind

colors: {
  custom: {
    50: '#8771e7',
    500: '#3739da',
    950: '#000000',
  },
}

SCSS

$custom: #3739da;
$custom-light: #8771e7;
$custom-dark: #000000;

JSON

{
  "hex": "#3739da",
  "rgb": {
    "r": 55,
    "g": 57,
    "b": 218
  },
  "hsl": {
    "h": 239.264,
    "s": 68.776,
    "l": 53.529
  },
  "oklch": {
    "l": 0.46681,
    "c": 0.23552,
    "h": 272.1
  },
  "luminance": 0.088
}

Semantic roles & 50–950 ramp

primary

#3739DA

secondary

#D9D893

accent

#E93CEC

background

#F9F7FE

surface

#F2EDFD

border

#CCC8D5

text

#0D0816

muted

#7E7B84

Preview Lab

Preview with #3739DA

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

Preview Lab → · Contrast checker → · Palette generator →