#3437B5#3437B5

#3437B5 is a dark, vivid blue. Relative luminance 0.068; OKLCH L 42.5% C 0.193 H 273.5°. Best body text is #FFFFFF at 8.90:1 contrast (WCAG AA passes).

Color values

HEX	#3437B5
RGB	rgb(52, 55, 181)
HSL	hsl(239, 55%, 46%)
HSV	hsv(239, 71%, 71%)
CMYK	cmyk(71.3%, 69.6%, 0%, 29%)
CIE-LAB	lab(31.34, 40.49, -66.72)
CIE-LCH	lch(31.34, 78.05, 301.25°)
OKLab	oklab(42.5% 0.0118 -0.1929)
OKLCH	oklch(42.5% 0.193 273.5)
XYZ	xyz(11.1201, 6.7975, 44.4331)
Luminance	0.0680 (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

#3437B5 #B5B234

analogous

#3477B5 #3437B5 #7234B5

triadic

#3437B5 #B53437 #37B534

tetradic

#3437B5 #B53477 #B5B234 #34B572

square

#3437B5 #B53477 #B5B234 #34B572

split-complementary

#3437B5 #B57234 #77B534

monochromatic

#191A56 #262985 #3437B5 #575ACF #8789DC

Accessibility & contrast

On white

8.90

#3437B5 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.36

#3437B5 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3437B5

8.90:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3437B5	#FFFFFF	#000000	##FFFFFF
##3437B5	1.00	8.90	2.36	8.90
#FFFFFF	8.90	1.00	21.00	1.00
#000000	2.36	21.00	1.00	21.00
##FFFFFF	8.90	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0050B9

Deuteranopia (green-blind)

#0044B3

Tritanopia (blue-blind)

#005A72

Achromatopsia (no color)

#4A4A4A

Design tokens & code

CSS

--color: #3437b5;
/* rgb */ color: rgb(52, 55, 181);
/* oklch */ color: oklch(42.5% 0.193 273.5);

Tailwind

colors: {
  custom: {
    50: '#7e6fcc',
    500: '#3437b5',
    950: '#000000',
  },
}

SCSS

$custom: #3437b5;
$custom-light: #7e6fcc;
$custom-dark: #000000;

JSON

{
  "hex": "#3437b5",
  "rgb": {
    "r": 52,
    "g": 55,
    "b": 181
  },
  "hsl": {
    "h": 238.605,
    "s": 55.365,
    "l": 45.686
  },
  "oklch": {
    "l": 0.42497,
    "c": 0.19327,
    "h": 273.5
  },
  "luminance": 0.06799
}

Semantic roles & 50–950 ramp

primary

#3437B5

secondary

#C6C57F

accent

#DB49DF

background

#F8F6FC

surface

#F0ECF9

border

#CBC7D2

text

#0B0714

muted

#7C7A82

Preview Lab

Preview with #3437B5

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

Preview Lab → · Contrast checker → · Palette generator →