#437BF4#437BF4

#437BF4 is a mid, vivid blue. Relative luminance 0.219; OKLCH L 61.0% C 0.191 H 263.2°. Best body text is #000000 at 5.38:1 contrast (WCAG AA passes).

Color values

HEX	#437BF4
RGB	rgb(67, 123, 244)
HSL	hsl(221, 89%, 61%)
HSV	hsv(221, 73%, 96%)
CMYK	cmyk(72.5%, 49.6%, 0%, 4.3%)
CIE-LAB	lab(53.91, 22.08, -66.07)
CIE-LCH	lch(53.91, 69.67, 288.48°)
OKLab	oklab(61.03% -0.0226 -0.1899)
OKLCH	oklch(61.03% 0.191 263.2)
XYZ	xyz(25.7210, 21.8881, 88.4397)
Luminance	0.2189 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#437BF4 #F4BC43

analogous

#43D3F4 #437BF4 #6343F4

triadic

#437BF4 #F4437B #7BF443

tetradic

#437BF4 #F443D3 #F4BC43 #43F463

square

#437BF4 #F443D3 #F4BC43 #43F463

split-complementary

#437BF4 #F46343 #D3F443

monochromatic

#0A3FB2 #0E54EC #437BF4 #7DA4F7 #B7CCFB

Accessibility & contrast

On white

3.90

#437BF4 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.38

#437BF4 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #437BF4

5.38:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##437BF4	#FFFFFF	#000000	##000000
##437BF4	1.00	3.90	5.38	5.38
#FFFFFF	3.90	1.00	21.00	21.00
#000000	5.38	21.00	1.00	1.00
##000000	5.38	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#3289F8

Deuteranopia (green-blind)

#0079F2

Tritanopia (blue-blind)

#0098AC

Achromatopsia (no color)

#818181

Design tokens & code

CSS

--color: #437bf4;
/* rgb */ color: rgb(67, 123, 244);
/* oklch */ color: oklch(61.0% 0.191 263.2);

Tailwind

colors: {
  custom: {
    50: '#8da0f8',
    500: '#437bf4',
    950: '#000000',
  },
}

SCSS

$custom: #437bf4;
$custom-light: #8da0f8;
$custom-dark: #000000;

JSON

{
  "hex": "#437bf4",
  "rgb": {
    "r": 67,
    "g": 123,
    "b": 244
  },
  "hsl": {
    "h": 221.017,
    "s": 88.945,
    "l": 60.98
  },
  "oklch": {
    "l": 0.61026,
    "c": 0.19126,
    "h": 263.2
  },
  "luminance": 0.21891
}

Semantic roles & 50–950 ramp

primary

#437BF4

secondary

#EBD6A8

accent

#9D00E6

background

#F9F9FF

surface

#F2F2FF

border

#CCCCD7

text

#0E0E17

muted

#7E7E85

Preview Lab

Preview with #437BF4

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

Preview Lab → · Contrast checker → · Palette generator →