#4370CB#4370CB

#4370CB is a mid, vivid blue. Relative luminance 0.171; OKLCH L 56.0% C 0.150 H 262.7°. Best body text is #FFFFFF at 4.75:1 contrast (WCAG AA passes).

Color values

HEX	#4370CB
RGB	rgb(67, 112, 203)
HSL	hsl(220, 57%, 53%)
HSV	hsv(220, 67%, 80%)
CMYK	cmyk(67%, 44.8%, 0%, 20.4%)
CIE-LAB	lab(48.38, 14.28, -51.87)
CIE-LCH	lch(48.38, 53.80, 285.39°)
OKLab	oklab(55.97% -0.0189 -0.1483)
OKLCH	oklch(55.97% 0.15 262.7)
XYZ	xyz(18.8846, 17.0916, 58.7921)
Luminance	0.1709 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4370CB #CB9E43

analogous

#43B4CB #4370CB #5A43CB

triadic

#4370CB #CB4370 #70CB43

tetradic

#4370CB #CB43B4 #CB9E43 #43CB5A

square

#4370CB #CB43B4 #CB9E43 #43CB5A

split-complementary

#4370CB #CB5A43 #B4CB43

monochromatic

#203C74 #2D54A4 #4370CB #7394D8 #A3B9E6

Accessibility & contrast

On white

4.75

#4370CB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.42

#4370CB on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #4370CB

4.75:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4370CB	#FFFFFF	#000000	##FFFFFF
##4370CB	1.00	4.75	4.42	4.75
#FFFFFF	4.75	1.00	21.00	1.00
#000000	4.42	21.00	1.00	21.00
##FFFFFF	4.75	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#437ACE

Deuteranopia (green-blind)

#2B6DC9

Tritanopia (blue-blind)

#008593

Achromatopsia (no color)

#737373

Design tokens & code

CSS

--color: #4370cb;
/* rgb */ color: rgb(67, 112, 203);
/* oklch */ color: oklch(56.0% 0.150 262.7);

Tailwind

colors: {
  custom: {
    50: '#8598db',
    500: '#4370cb',
    950: '#000000',
  },
}

SCSS

$custom: #4370cb;
$custom-light: #8598db;
$custom-dark: #000000;

JSON

{
  "hex": "#4370cb",
  "rgb": {
    "r": 67,
    "g": 112,
    "b": 203
  },
  "hsl": {
    "h": 220.147,
    "s": 56.667,
    "l": 52.941
  },
  "oklch": {
    "l": 0.55969,
    "c": 0.14951,
    "h": 262.7
  },
  "luminance": 0.17093
}

Semantic roles & 50–950 ramp

primary

#4370CB

secondary

#D2BF98

accent

#AE48E0

background

#F8F9FD

surface

#F0F2FB

border

#CBCCD4

text

#0C0D15

muted

#7D7E83

Preview Lab

Preview with #4370CB

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

Preview Lab → · Contrast checker → · Palette generator →