#4257D4#4257D4

#4257D4 is a mid, vivid blue. Relative luminance 0.127; OKLCH L 51.6% C 0.193 H 270.8°. Best body text is #FFFFFF at 5.92:1 contrast (WCAG AA passes).

Color values

HEX	#4257D4
RGB	rgb(66, 87, 212)
HSL	hsl(231, 63%, 55%)
HSV	hsv(231, 69%, 83%)
CMYK	cmyk(68.9%, 59%, 0%, 16.9%)
CIE-LAB	lab(42.35, 33.14, -66.77)
CIE-LCH	lch(42.35, 74.54, 296.39°)
OKLab	oklab(51.59% 0.0026 -0.1925)
OKLCH	oklch(51.59% 0.193 270.8)
XYZ	xyz(17.5346, 12.7264, 63.8069)
Luminance	0.1273 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4257D4 #D4BF42

analogous

#42A0D4 #4257D4 #7642D4

triadic

#4257D4 #D44257 #57D442

tetradic

#4257D4 #D442A0 #D4BF42 #42D476

square

#4257D4 #D442A0 #D4BF42 #42D476

split-complementary

#4257D4 #D47642 #A0D442

monochromatic

#1D2B7F #283CB1 #4257D4 #7483DF #A6B0EB

Accessibility & contrast

On white

5.92

#4257D4 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.55

#4257D4 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #4257D4

5.92:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4257D4	#FFFFFF	#000000	##FFFFFF
##4257D4	1.00	5.92	3.55	5.92
#FFFFFF	5.92	1.00	21.00	1.00
#000000	3.55	21.00	1.00	21.00
##FFFFFF	5.92	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#006BD8

Deuteranopia (green-blind)

#005DD2

Tritanopia (blue-blind)

#00768D

Achromatopsia (no color)

#646464

Design tokens & code

CSS

--color: #4257d4;
/* rgb */ color: rgb(66, 87, 212);
/* oklch */ color: oklch(51.6% 0.193 270.8);

Tailwind

colors: {
  custom: {
    50: '#8886e2',
    500: '#4257d4',
    950: '#000000',
  },
}

SCSS

$custom: #4257d4;
$custom-light: #8886e2;
$custom-dark: #000000;

JSON

{
  "hex": "#4257d4",
  "rgb": {
    "r": 66,
    "g": 87,
    "b": 212
  },
  "hsl": {
    "h": 231.37,
    "s": 62.931,
    "l": 54.51
  },
  "oklch": {
    "l": 0.5159,
    "c": 0.19252,
    "h": 270.8
  },
  "luminance": 0.12728
}

Semantic roles & 50–950 ramp

primary

#4257D4

secondary

#D8CF9A

accent

#CE42E6

background

#F9F8FE

surface

#F1EFFC

border

#CBCAD5

text

#0D0B15

muted

#7E7C84

Preview Lab

Preview with #4257D4

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

Preview Lab → · Contrast checker → · Palette generator →