#3437BB#3437BB

#3437BB is a dark, highly saturated blue. Relative luminance 0.070; OKLCH L 43.1% C 0.201 H 273.1°. Best body text is #FFFFFF at 8.71:1 contrast (WCAG AA passes).

Color values

HEX	#3437BB
RGB	rgb(52, 55, 187)
HSL	hsl(239, 56%, 47%)
HSV	hsv(239, 72%, 73%)
CMYK	cmyk(72.2%, 70.6%, 0%, 26.7%)
CIE-LAB	lab(31.92, 42.53, -69.33)
CIE-LCH	lch(31.92, 81.33, 301.53°)
OKLab	oklab(43.09% 0.011 -0.2005)
OKLCH	oklch(43.09% 0.201 273.1)
XYZ	xyz(11.7490, 7.0491, 47.7455)
Luminance	0.0705 (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

#3437BB #BBB834

analogous

#347ABB #3437BB #7534BB

triadic

#3437BB #BB3437 #37BB34

tetradic

#3437BB #BB347A #BBB834 #34BB75

square

#3437BB #BB347A #BBB834 #34BB75

split-complementary

#3437BB #BB7534 #7ABB34

monochromatic

#191B5B #27298B #3437BB #5B5DD1 #8B8DDF

Accessibility & contrast

On white

8.71

#3437BB on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.41

#3437BB on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3437BB

8.71:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3437BB	#FFFFFF	#000000	##FFFFFF
##3437BB	1.00	8.71	2.41	8.71
#FFFFFF	8.71	1.00	21.00	1.00
#000000	2.41	21.00	1.00	21.00
##FFFFFF	8.71	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0051BF

Deuteranopia (green-blind)

#0045B9

Tritanopia (blue-blind)

#005C75

Achromatopsia (no color)

#4B4B4B

Design tokens & code

CSS

--color: #3437bb;
/* rgb */ color: rgb(52, 55, 187);
/* oklch */ color: oklch(43.1% 0.201 273.1);

Tailwind

colors: {
  custom: {
    50: '#7f6fd1',
    500: '#3437bb',
    950: '#000000',
  },
}

SCSS

$custom: #3437bb;
$custom-light: #7f6fd1;
$custom-dark: #000000;

JSON

{
  "hex": "#3437bb",
  "rgb": {
    "r": 52,
    "g": 55,
    "b": 187
  },
  "hsl": {
    "h": 238.667,
    "s": 56.485,
    "l": 46.863
  },
  "oklch": {
    "l": 0.43087,
    "c": 0.20081,
    "h": 273.1
  },
  "luminance": 0.0705
}

Semantic roles & 50–950 ramp

primary

#3437BB

secondary

#C9C782

accent

#DC48E0

background

#F8F6FD

surface

#F0ECFA

border

#CBC7D3

text

#0C0714

muted

#7D7A83

Preview Lab

Preview with #3437BB

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

Preview Lab → · Contrast checker → · Palette generator →