#3437B7#3437B7

#3437B7 is a dark, vivid blue. Relative luminance 0.069; OKLCH L 42.7% C 0.196 H 273.4°. Best body text is #FFFFFF at 8.84:1 contrast (WCAG AA passes).

Color values

HEX	#3437B7
RGB	rgb(52, 55, 183)
HSL	hsl(239, 56%, 46%)
HSV	hsv(239, 72%, 72%)
CMYK	cmyk(71.6%, 69.9%, 0%, 28.2%)
CIE-LAB	lab(31.53, 41.17, -67.60)
CIE-LCH	lch(31.53, 79.15, 301.34°)
OKLab	oklab(42.69% 0.0115 -0.1955)
OKLCH	oklch(42.69% 0.196 273.4)
XYZ	xyz(11.3267, 6.8802, 45.5217)
Luminance	0.0688 (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

#3437B7 #B7B434

analogous

#3478B7 #3437B7 #7234B7

triadic

#3437B7 #B73437 #37B734

tetradic

#3437B7 #B73478 #B7B434 #34B772

square

#3437B7 #B73478 #B7B434 #34B772

split-complementary

#3437B7 #B77234 #78B734

monochromatic

#191A58 #262987 #3437B7 #595BD0 #888ADD

Accessibility & contrast

On white

8.84

#3437B7 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.38

#3437B7 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3437B7

8.84:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3437B7	#FFFFFF	#000000	##FFFFFF
##3437B7	1.00	8.84	2.38	8.84
#FFFFFF	8.84	1.00	21.00	1.00
#000000	2.38	21.00	1.00	21.00
##FFFFFF	8.84	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0050BB

Deuteranopia (green-blind)

#0044B5

Tritanopia (blue-blind)

#005A73

Achromatopsia (no color)

#4A4A4A

Design tokens & code

CSS

--color: #3437b7;
/* rgb */ color: rgb(52, 55, 183);
/* oklch */ color: oklch(42.7% 0.196 273.4);

Tailwind

colors: {
  custom: {
    50: '#7f6fce',
    500: '#3437b7',
    950: '#000000',
  },
}

SCSS

$custom: #3437b7;
$custom-light: #7f6fce;
$custom-dark: #000000;

JSON

{
  "hex": "#3437b7",
  "rgb": {
    "r": 52,
    "g": 55,
    "b": 183
  },
  "hsl": {
    "h": 238.626,
    "s": 55.745,
    "l": 46.078
  },
  "oklch": {
    "l": 0.42693,
    "c": 0.19579,
    "h": 273.4
  },
  "luminance": 0.06881
}

Semantic roles & 50–950 ramp

primary

#3437B7

secondary

#C7C680

accent

#DC49DF

background

#F8F6FC

surface

#F0ECF9

border

#CBC7D2

text

#0C0714

muted

#7D7A82

Preview Lab

Preview with #3437B7

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

Preview Lab → · Contrast checker → · Palette generator →