#4370D5#4370D5

#4370D5 is a mid, vivid blue. Relative luminance 0.176; OKLCH L 56.6% C 0.163 H 263.9°. Best body text is #FFFFFF at 4.65:1 contrast (WCAG AA passes).

Color values

HEX	#4370D5
RGB	rgb(67, 112, 213)
HSL	hsl(222, 63%, 55%)
HSV	hsv(222, 69%, 84%)
CMYK	cmyk(68.5%, 47.4%, 0%, 16.5%)
CIE-LAB	lab(48.99, 17.85, -56.59)
CIE-LCH	lch(48.99, 59.34, 287.50°)
OKLab	oklab(56.64% -0.0174 -0.1622)
OKLCH	oklch(56.64% 0.163 263.9)
XYZ	xyz(20.1149, 17.5837, 65.2718)
Luminance	0.1759 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4370D5 #D5A843

analogous

#43B9D5 #4370D5 #5F43D5

triadic

#4370D5 #D54370 #70D543

tetradic

#4370D5 #D543B9 #D5A843 #43D55F

square

#4370D5 #D543B9 #D5A843 #43D55F

split-complementary

#4370D5 #D55F43 #B9D543

monochromatic

#1D3C81 #2853B3 #4370D5 #7596E0 #A7BCEB

Accessibility & contrast

On white

4.65

#4370D5 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.52

#4370D5 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#FFFFFF on #4370D5

4.65:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4370D5	#FFFFFF	#000000	##FFFFFF
##4370D5	1.00	4.65	4.52	4.65
#FFFFFF	4.65	1.00	21.00	1.00
#000000	4.52	21.00	1.00	21.00
##FFFFFF	4.65	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3A7CD9

Deuteranopia (green-blind)

#176ED3

Tritanopia (blue-blind)

#008898

Achromatopsia (no color)

#747474

Design tokens & code

CSS

--color: #4370d5;
/* rgb */ color: rgb(67, 112, 213);
/* oklch */ color: oklch(56.6% 0.163 263.9);

Tailwind

colors: {
  custom: {
    50: '#8798e2',
    500: '#4370d5',
    950: '#000000',
  },
}

SCSS

$custom: #4370d5;
$custom-light: #8798e2;
$custom-dark: #000000;

JSON

{
  "hex": "#4370d5",
  "rgb": {
    "r": 67,
    "g": 112,
    "b": 213
  },
  "hsl": {
    "h": 221.507,
    "s": 63.478,
    "l": 54.902
  },
  "oklch": {
    "l": 0.56636,
    "c": 0.16312,
    "h": 263.9
  },
  "luminance": 0.17586
}

Semantic roles & 50–950 ramp

primary

#4370D5

secondary

#D9C69B

accent

#B441E7

background

#F8F9FD

surface

#F0F2FB

border

#CBCCD4

text

#0D0D15

muted

#7D7E83

Preview Lab

Preview with #4370D5

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

Preview Lab → · Contrast checker → · Palette generator →