#3739C5#3739C5

#3739C5 is a dark, highly saturated blue. Relative luminance 0.078; OKLCH L 44.6% C 0.210 H 273.2°. Best body text is #FFFFFF at 8.22:1 contrast (WCAG AA passes).

Color values

HEX	#3739C5
RGB	rgb(55, 57, 197)
HSL	hsl(239, 56%, 49%)
HSV	hsv(239, 72%, 77%)
CMYK	cmyk(72.1%, 71.1%, 0%, 22.7%)
CIE-LAB	lab(33.50, 45.02, -72.60)
CIE-LCH	lch(33.50, 85.43, 301.80°)
OKLab	oklab(44.56% 0.0119 -0.21)
OKLCH	oklch(44.56% 0.21 273.2)
XYZ	xyz(13.1133, 7.7684, 53.6209)
Luminance	0.0777 (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

#3739C5 #C5C337

analogous

#3780C5 #3739C5 #7C37C5

triadic

#3739C5 #C53739 #39C537

tetradic

#3739C5 #C53780 #C5C337 #37C57C

square

#3739C5 #C53780 #C5C337 #37C57C

split-complementary

#3739C5 #C57C37 #80C537

monochromatic

#1C1D65 #2A2B95 #3739C5 #6567D4 #9596E1

Accessibility & contrast

On white

8.22

#3739C5 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.55

#3739C5 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3739C5

8.22:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3739C5	#FFFFFF	#000000	##FFFFFF
##3739C5	1.00	8.22	2.55	8.22
#FFFFFF	8.22	1.00	21.00	1.00
#000000	2.55	21.00	1.00	21.00
##FFFFFF	8.22	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0055C9

Deuteranopia (green-blind)

#0048C2

Tritanopia (blue-blind)

#00607B

Achromatopsia (no color)

#4F4F4F

Design tokens & code

CSS

--color: #3739c5;
/* rgb */ color: rgb(55, 57, 197);
/* oklch */ color: oklch(44.6% 0.210 273.2);

Tailwind

colors: {
  custom: {
    50: '#8371d8',
    500: '#3739c5',
    950: '#000000',
  },
}

SCSS

$custom: #3739c5;
$custom-light: #8371d8;
$custom-dark: #000000;

JSON

{
  "hex": "#3739c5",
  "rgb": {
    "r": 55,
    "g": 57,
    "b": 197
  },
  "hsl": {
    "h": 239.155,
    "s": 56.349,
    "l": 49.412
  },
  "oklch": {
    "l": 0.44559,
    "c": 0.21033,
    "h": 273.2
  },
  "luminance": 0.0777
}

Semantic roles & 50–950 ramp

primary

#3739C5

secondary

#CDCC8B

accent

#DE48E0

background

#F8F6FD

surface

#F0ECFB

border

#CBC7D4

text

#0C0815

muted

#7D7B83

Preview Lab

Preview with #3739C5

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

Preview Lab → · Contrast checker → · Palette generator →