#4370D7#4370D7

#4370D7 is a mid, vivid blue. Relative luminance 0.177; OKLCH L 56.8% C 0.166 H 264.1°. Best body text is #FFFFFF at 4.63:1 contrast (WCAG AA passes).

Color values

HEX	#4370D7
RGB	rgb(67, 112, 215)
HSL	hsl(222, 65%, 55%)
HSV	hsv(222, 69%, 84%)
CMYK	cmyk(68.8%, 47.9%, 0%, 15.7%)
CIE-LAB	lab(49.11, 18.56, -57.52)
CIE-LCH	lch(49.11, 60.44, 287.88°)
OKLab	oklab(56.77% -0.0171 -0.1649)
OKLCH	oklch(56.77% 0.166 264.1)
XYZ	xyz(20.3703, 17.6859, 66.6170)
Luminance	0.1769 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4370D7 #D7AA43

analogous

#43BAD7 #4370D7 #6043D7

triadic

#4370D7 #D74370 #70D743

tetradic

#4370D7 #D743BA #D7AA43 #43D760

square

#4370D7 #D743BA #D7AA43 #43D760

split-complementary

#4370D7 #D76043 #BAD743

monochromatic

#1C3B84 #2752B6 #4370D7 #7596E2 #A8BDEC

Accessibility & contrast

On white

4.63

#4370D7 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.54

#4370D7 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#FFFFFF on #4370D7

4.63:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4370D7	#FFFFFF	#000000	##FFFFFF
##4370D7	1.00	4.63	4.54	4.63
#FFFFFF	4.63	1.00	21.00	1.00
#000000	4.54	21.00	1.00	21.00
##FFFFFF	4.63	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#387CDB

Deuteranopia (green-blind)

#106ED5

Tritanopia (blue-blind)

#008899

Achromatopsia (no color)

#757575

Design tokens & code

CSS

--color: #4370d7;
/* rgb */ color: rgb(67, 112, 215);
/* oklch */ color: oklch(56.8% 0.166 264.1);

Tailwind

colors: {
  custom: {
    50: '#8898e4',
    500: '#4370d7',
    950: '#000000',
  },
}

SCSS

$custom: #4370d7;
$custom-light: #8898e4;
$custom-dark: #000000;

JSON

{
  "hex": "#4370d7",
  "rgb": {
    "r": 67,
    "g": 112,
    "b": 215
  },
  "hsl": {
    "h": 221.757,
    "s": 64.912,
    "l": 55.294
  },
  "oklch": {
    "l": 0.56772,
    "c": 0.16582,
    "h": 264.1
  },
  "luminance": 0.17688
}

Semantic roles & 50–950 ramp

primary

#4370D7

secondary

#DAC79C

accent

#B540E8

background

#F9F9FE

surface

#F1F2FC

border

#CBCCD5

text

#0D0D16

muted

#7E7E84

Preview Lab

Preview with #4370D7

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

Preview Lab → · Contrast checker → · Palette generator →