#4257D2#4257D2

#4257D2 is a mid, vivid blue. Relative luminance 0.126; OKLCH L 51.4% C 0.190 H 270.8°. Best body text is #FFFFFF at 5.96:1 contrast (WCAG AA passes).

Color values

HEX	#4257D2
RGB	rgb(66, 87, 210)
HSL	hsl(231, 62%, 54%)
HSV	hsv(231, 69%, 82%)
CMYK	cmyk(68.6%, 58.6%, 0%, 17.6%)
CIE-LAB	lab(42.19, 32.43, -65.87)
CIE-LCH	lch(42.19, 73.42, 296.22°)
OKLab	oklab(51.43% 0.0026 -0.1899)
OKLCH	oklch(51.43% 0.19 270.8)
XYZ	xyz(17.2839, 12.6261, 62.4865)
Luminance	0.1263 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4257D2 #D2BD42

analogous

#429FD2 #4257D2 #7542D2

triadic

#4257D2 #D24257 #57D242

tetradic

#4257D2 #D2429F #D2BD42 #42D275

square

#4257D2 #D2429F #D2BD42 #42D275

split-complementary

#4257D2 #D27542 #9FD242

monochromatic

#1E2B7C #293DAD #4257D2 #7383DE #A5AFEA

Accessibility & contrast

On white

5.96

#4257D2 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.53

#4257D2 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #4257D2

5.96:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4257D2	#FFFFFF	#000000	##FFFFFF
##4257D2	1.00	5.96	3.53	5.96
#FFFFFF	5.96	1.00	21.00	1.00
#000000	3.53	21.00	1.00	21.00
##FFFFFF	5.96	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#006AD6

Deuteranopia (green-blind)

#005DD0

Tritanopia (blue-blind)

#00768C

Achromatopsia (no color)

#646464

Design tokens & code

CSS

--color: #4257d2;
/* rgb */ color: rgb(66, 87, 210);
/* oklch */ color: oklch(51.4% 0.190 270.8);

Tailwind

colors: {
  custom: {
    50: '#8886e1',
    500: '#4257d2',
    950: '#000000',
  },
}

SCSS

$custom: #4257d2;
$custom-light: #8886e1;
$custom-dark: #000000;

JSON

{
  "hex": "#4257d2",
  "rgb": {
    "r": 66,
    "g": 87,
    "b": 210
  },
  "hsl": {
    "h": 231.25,
    "s": 61.538,
    "l": 54.118
  },
  "oklch": {
    "l": 0.51428,
    "c": 0.18988,
    "h": 270.8
  },
  "luminance": 0.12628
}

Semantic roles & 50–950 ramp

primary

#4257D2

secondary

#D7CE99

accent

#CD43E5

background

#F9F8FD

surface

#F1EFFB

border

#CBCAD4

text

#0D0B15

muted

#7E7C83

Preview Lab

Preview with #4257D2

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

Preview Lab → · Contrast checker → · Palette generator →