#3437B4#3437B4

#3437B4 is a dark, vivid blue. Relative luminance 0.068; OKLCH L 42.4% C 0.192 H 273.6°. Best body text is #FFFFFF at 8.93:1 contrast (WCAG AA passes).

Color values

HEX	#3437B4
RGB	rgb(52, 55, 180)
HSL	hsl(239, 55%, 45%)
HSV	hsv(239, 71%, 71%)
CMYK	cmyk(71.1%, 69.4%, 0%, 29.4%)
CIE-LAB	lab(31.25, 40.14, -66.29)
CIE-LCH	lch(31.25, 77.49, 301.20°)
OKLab	oklab(42.4% 0.0119 -0.1916)
OKLCH	oklch(42.4% 0.192 273.6)
XYZ	xyz(11.0178, 6.7567, 43.8947)
Luminance	0.0676 (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

#3437B4 #B4B134

analogous

#3477B4 #3437B4 #7134B4

triadic

#3437B4 #B43437 #37B434

tetradic

#3437B4 #B43477 #B4B134 #34B471

square

#3437B4 #B43477 #B4B134 #34B471

split-complementary

#3437B4 #B47134 #77B434

monochromatic

#191A55 #262885 #3437B4 #575ACE #8688DC

Accessibility & contrast

On white

8.93

#3437B4 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.35

#3437B4 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3437B4

8.93:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3437B4	#FFFFFF	#000000	##FFFFFF
##3437B4	1.00	8.93	2.35	8.93
#FFFFFF	8.93	1.00	21.00	1.00
#000000	2.35	21.00	1.00	21.00
##FFFFFF	8.93	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0050B8

Deuteranopia (green-blind)

#0043B2

Tritanopia (blue-blind)

#005971

Achromatopsia (no color)

#4A4A4A

Design tokens & code

CSS

--color: #3437b4;
/* rgb */ color: rgb(52, 55, 180);
/* oklch */ color: oklch(42.4% 0.192 273.6);

Tailwind

colors: {
  custom: {
    50: '#7e6fcc',
    500: '#3437b4',
    950: '#000000',
  },
}

SCSS

$custom: #3437b4;
$custom-light: #7e6fcc;
$custom-dark: #000000;

JSON

{
  "hex": "#3437b4",
  "rgb": {
    "r": 52,
    "g": 55,
    "b": 180
  },
  "hsl": {
    "h": 238.594,
    "s": 55.172,
    "l": 45.49
  },
  "oklch": {
    "l": 0.424,
    "c": 0.192,
    "h": 273.6
  },
  "luminance": 0.06758
}

Semantic roles & 50–950 ramp

primary

#3437B4

secondary

#C6C47E

accent

#DB49DF

background

#F8F6FC

surface

#EFECF9

border

#CAC7D2

text

#0B0713

muted

#7C7A82

Preview Lab

Preview with #3437B4

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

Preview Lab → · Contrast checker → · Palette generator →