#3739B6#3739B6

#3739B6 is a dark, vivid blue. Relative luminance 0.071; OKLCH L 43.1% C 0.192 H 274.2°. Best body text is #FFFFFF at 8.67:1 contrast (WCAG AA passes).

Color values

HEX	#3739B6
RGB	rgb(55, 57, 182)
HSL	hsl(239, 54%, 46%)
HSV	hsv(239, 70%, 71%)
CMYK	cmyk(69.8%, 68.7%, 0%, 28.6%)
CIE-LAB	lab(32.07, 39.97, -66.12)
CIE-LCH	lch(32.07, 77.26, 301.15°)
OKLab	oklab(43.1% 0.0139 -0.1911)
OKLCH	oklch(43.1% 0.192 274.2)
XYZ	xyz(11.4794, 7.1148, 45.0152)
Luminance	0.0712 (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

#3739B6 #B6B437

analogous

#3779B6 #3739B6 #7537B6

triadic

#3739B6 #B63739 #39B637

tetradic

#3739B6 #B63779 #B6B437 #37B675

square

#3739B6 #B63779 #B6B437 #37B675

split-complementary

#3739B6 #B67537 #79B637

monochromatic

#1B1C58 #292A87 #3739B6 #5C5ECE #8B8DDC

Accessibility & contrast

On white

8.67

#3739B6 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.42

#3739B6 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3739B6

8.67:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3739B6	#FFFFFF	#000000	##FFFFFF
##3739B6	1.00	8.67	2.42	8.67
#FFFFFF	8.67	1.00	21.00	1.00
#000000	2.42	21.00	1.00	21.00
##FFFFFF	8.67	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0051BA

Deuteranopia (green-blind)

#0046B4

Tritanopia (blue-blind)

#005B73

Achromatopsia (no color)

#4B4B4B

Design tokens & code

CSS

--color: #3739b6;
/* rgb */ color: rgb(55, 57, 182);
/* oklch */ color: oklch(43.1% 0.192 274.2);

Tailwind

colors: {
  custom: {
    50: '#7f70cd',
    500: '#3739b6',
    950: '#000000',
  },
}

SCSS

$custom: #3739b6;
$custom-light: #7f70cd;
$custom-dark: #000000;

JSON

{
  "hex": "#3739b6",
  "rgb": {
    "r": 55,
    "g": 57,
    "b": 182
  },
  "hsl": {
    "h": 239.055,
    "s": 53.586,
    "l": 46.471
  },
  "oklch": {
    "l": 0.43099,
    "c": 0.19157,
    "h": 274.2
  },
  "luminance": 0.07116
}

Semantic roles & 50–950 ramp

primary

#3739B6

secondary

#C6C582

accent

#DB4BDD

background

#F8F6FC

surface

#F0ECF9

border

#CBC7D2

text

#0C0714

muted

#7D7A82

Preview Lab

Preview with #3739B6

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

Preview Lab → · Contrast checker → · Palette generator →