#4370D8#4370D8

#4370D8 is a mid, vivid blue. Relative luminance 0.177; OKLCH L 56.8% C 0.167 H 264.2°. Best body text is #FFFFFF at 4.62:1 contrast (WCAG AA passes).

Color values

HEX	#4370D8
RGB	rgb(67, 112, 216)
HSL	hsl(222, 66%, 55%)
HSV	hsv(222, 69%, 85%)
CMYK	cmyk(69%, 48.1%, 0%, 15.3%)
CIE-LAB	lab(49.18, 18.92, -57.99)
CIE-LCH	lch(49.18, 61.00, 288.07°)
OKLab	oklab(56.84% -0.0169 -0.1663)
OKLCH	oklch(56.84% 0.167 264.2)
XYZ	xyz(20.4992, 17.7374, 67.2958)
Luminance	0.1774 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4370D8 #D8AB43

analogous

#43BBD8 #4370D8 #6043D8

triadic

#4370D8 #D84370 #70D843

tetradic

#4370D8 #D843BB #D8AB43 #43D860

square

#4370D8 #D843BB #D8AB43 #43D860

split-complementary

#4370D8 #D86043 #BBD843

monochromatic

#1C3B85 #2652B8 #4370D8 #7697E3 #A8BDED

Accessibility & contrast

On white

4.62

#4370D8 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.55

#4370D8 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#FFFFFF on #4370D8

4.62:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4370D8	#FFFFFF	#000000	##FFFFFF
##4370D8	1.00	4.62	4.55	4.62
#FFFFFF	4.62	1.00	21.00	1.00
#000000	4.55	21.00	1.00	21.00
##FFFFFF	4.62	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#377CDC

Deuteranopia (green-blind)

#0C6ED6

Tritanopia (blue-blind)

#00889A

Achromatopsia (no color)

#757575

Design tokens & code

CSS

--color: #4370d8;
/* rgb */ color: rgb(67, 112, 216);
/* oklch */ color: oklch(56.8% 0.167 264.2);

Tailwind

colors: {
  custom: {
    50: '#8898e5',
    500: '#4370d8',
    950: '#000000',
  },
}

SCSS

$custom: #4370d8;
$custom-light: #8898e5;
$custom-dark: #000000;

JSON

{
  "hex": "#4370d8",
  "rgb": {
    "r": 67,
    "g": 112,
    "b": 216
  },
  "hsl": {
    "h": 221.879,
    "s": 65.639,
    "l": 55.49
  },
  "oklch": {
    "l": 0.56841,
    "c": 0.16717,
    "h": 264.2
  },
  "luminance": 0.1774
}

Semantic roles & 50–950 ramp

primary

#4370D8

secondary

#DAC89C

accent

#B53FE9

background

#F9F9FE

surface

#F1F2FC

border

#CBCCD5

text

#0D0D16

muted

#7E7E84

Preview Lab

Preview with #4370D8

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

Preview Lab → · Contrast checker → · Palette generator →