#3437B9#3437B9

#3437B9 is a dark, vivid blue. Relative luminance 0.070; OKLCH L 42.9% C 0.198 H 273.3°. Best body text is #FFFFFF at 8.78:1 contrast (WCAG AA passes).

Color values

HEX	#3437B9
RGB	rgb(52, 55, 185)
HSL	hsl(239, 56%, 46%)
HSV	hsv(239, 72%, 73%)
CMYK	cmyk(71.9%, 70.3%, 0%, 27.5%)
CIE-LAB	lab(31.73, 41.85, -68.46)
CIE-LCH	lch(31.73, 80.24, 301.44°)
OKLab	oklab(42.89% 0.0113 -0.198)
OKLCH	oklch(42.89% 0.198 273.3)
XYZ	xyz(11.5364, 6.9641, 46.6258)
Luminance	0.0697 (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

#3437B9 #B9B634

analogous

#347AB9 #3437B9 #7434B9

triadic

#3437B9 #B93437 #37B934

tetradic

#3437B9 #B9347A #B9B634 #34B974

square

#3437B9 #B9347A #B9B634 #34B974

split-complementary

#3437B9 #B97434 #7AB934

monochromatic

#191B59 #272989 #3437B9 #5A5CD1 #898BDE

Accessibility & contrast

On white

8.78

#3437B9 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.39

#3437B9 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3437B9

8.78:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3437B9	#FFFFFF	#000000	##FFFFFF
##3437B9	1.00	8.78	2.39	8.78
#FFFFFF	8.78	1.00	21.00	1.00
#000000	2.39	21.00	1.00	21.00
##FFFFFF	8.78	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0051BD

Deuteranopia (green-blind)

#0044B7

Tritanopia (blue-blind)

#005B74

Achromatopsia (no color)

#4B4B4B

Design tokens & code

CSS

--color: #3437b9;
/* rgb */ color: rgb(52, 55, 185);
/* oklch */ color: oklch(42.9% 0.198 273.3);

Tailwind

colors: {
  custom: {
    50: '#7f6fcf',
    500: '#3437b9',
    950: '#000000',
  },
}

SCSS

$custom: #3437b9;
$custom-light: #7f6fcf;
$custom-dark: #000000;

JSON

{
  "hex": "#3437b9",
  "rgb": {
    "r": 52,
    "g": 55,
    "b": 185
  },
  "hsl": {
    "h": 238.647,
    "s": 56.118,
    "l": 46.471
  },
  "oklch": {
    "l": 0.42889,
    "c": 0.19831,
    "h": 273.3
  },
  "luminance": 0.06965
}

Semantic roles & 50–950 ramp

primary

#3437B9

secondary

#C8C681

accent

#DC48DF

background

#F8F6FC

surface

#F0ECF9

border

#CBC7D2

text

#0C0714

muted

#7D7A82

Preview Lab

Preview with #3437B9

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

Preview Lab → · Contrast checker → · Palette generator →