#4357C9#4357C9

#4357C9 is a mid, vivid blue. Relative luminance 0.122; OKLCH L 50.8% C 0.178 H 271.1°. Best body text is #FFFFFF at 6.10:1 contrast (WCAG AA passes).

Color values

HEX	#4357C9
RGB	rgb(67, 87, 201)
HSL	hsl(231, 55%, 53%)
HSV	hsv(231, 67%, 79%)
CMYK	cmyk(66.7%, 56.7%, 0%, 21.2%)
CIE-LAB	lab(41.57, 29.42, -61.69)
CIE-LCH	lch(41.57, 68.35, 295.50°)
OKLab	oklab(50.77% 0.0035 -0.1776)
OKLCH	oklch(50.77% 0.178 271.1)
XYZ	xyz(16.2620, 12.2252, 56.7497)
Luminance	0.1223 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4357C9 #C9B543

analogous

#439AC9 #4357C9 #7243C9

triadic

#4357C9 #C94357 #57C943

tetradic

#4357C9 #C9439A #C9B543 #43C972

square

#4357C9 #C9439A #C9B543 #43C972

split-complementary

#4357C9 #C97243 #9AC943

monochromatic

#202D71 #2E3FA1 #4357C9 #7381D7 #A2ACE4

Accessibility & contrast

On white

6.10

#4357C9 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.45

#4357C9 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #4357C9

6.10:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4357C9	#FFFFFF	#000000	##FFFFFF
##4357C9	1.00	6.10	3.45	6.10
#FFFFFF	6.10	1.00	21.00	1.00
#000000	3.45	21.00	1.00	21.00
##FFFFFF	6.10	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0068CD

Deuteranopia (green-blind)

#005CC7

Tritanopia (blue-blind)

#007387

Achromatopsia (no color)

#626262

Design tokens & code

CSS

--color: #4357c9;
/* rgb */ color: rgb(67, 87, 201);
/* oklch */ color: oklch(50.8% 0.178 271.1);

Tailwind

colors: {
  custom: {
    50: '#8686da',
    500: '#4357c9',
    950: '#000000',
  },
}

SCSS

$custom: #4357c9;
$custom-light: #8686da;
$custom-dark: #000000;

JSON

{
  "hex": "#4357c9",
  "rgb": {
    "r": 67,
    "g": 87,
    "b": 201
  },
  "hsl": {
    "h": 231.045,
    "s": 55.372,
    "l": 52.549
  },
  "oklch": {
    "l": 0.50766,
    "c": 0.17759,
    "h": 271.1
  },
  "luminance": 0.12227
}

Semantic roles & 50–950 ramp

primary

#4357C9

secondary

#D1C897

accent

#C849DF

background

#F8F8FD

surface

#F0EFFB

border

#CBCAD4

text

#0C0B15

muted

#7D7C83

Preview Lab

Preview with #4357C9

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

Preview Lab → · Contrast checker → · Palette generator →