#4257CE#4257CE

#4257CE is a mid, vivid blue. Relative luminance 0.124; OKLCH L 51.1% C 0.185 H 270.8°. Best body text is #FFFFFF at 6.02:1 contrast (WCAG AA passes).

Color values

HEX	#4257CE
RGB	rgb(66, 87, 206)
HSL	hsl(231, 59%, 53%)
HSV	hsv(231, 68%, 81%)
CMYK	cmyk(68%, 57.8%, 0%, 19.2%)
CIE-LAB	lab(41.89, 31.03, -64.06)
CIE-LCH	lch(41.89, 71.18, 295.84°)
OKLab	oklab(51.11% 0.0026 -0.1845)
OKLCH	oklch(51.11% 0.185 270.8)
XYZ	xyz(16.7918, 12.4293, 59.8947)
Luminance	0.1243 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4257CE #CEB942

analogous

#429DCE #4257CE #7342CE

triadic

#4257CE #CE4257 #57CE42

tetradic

#4257CE #CE429D #CEB942 #42CE73

square

#4257CE #CE429D #CEB942 #42CE73

split-complementary

#4257CE #CE7342 #9DCE42

monochromatic

#1F2C77 #2B3EA7 #4257CE #7382DB #A3ADE7

Accessibility & contrast

On white

6.02

#4257CE on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.49

#4257CE on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #4257CE

6.02:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4257CE	#FFFFFF	#000000	##FFFFFF
##4257CE	1.00	6.02	3.49	6.02
#FFFFFF	6.02	1.00	21.00	1.00
#000000	3.49	21.00	1.00	21.00
##FFFFFF	6.02	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0069D2

Deuteranopia (green-blind)

#005DCC

Tritanopia (blue-blind)

#00748A

Achromatopsia (no color)

#636363

Design tokens & code

CSS

--color: #4257ce;
/* rgb */ color: rgb(66, 87, 206);
/* oklch */ color: oklch(51.1% 0.185 270.8);

Tailwind

colors: {
  custom: {
    50: '#8786de',
    500: '#4257ce',
    950: '#000000',
  },
}

SCSS

$custom: #4257ce;
$custom-light: #8786de;
$custom-dark: #000000;

JSON

{
  "hex": "#4257ce",
  "rgb": {
    "r": 66,
    "g": 87,
    "b": 206
  },
  "hsl": {
    "h": 231,
    "s": 58.824,
    "l": 53.333
  },
  "oklch": {
    "l": 0.51106,
    "c": 0.18457,
    "h": 270.8
  },
  "luminance": 0.12431
}

Semantic roles & 50–950 ramp

primary

#4257CE

secondary

#D4CB98

accent

#CB46E2

background

#F8F8FD

surface

#F0EFFB

border

#CBCAD4

text

#0D0B15

muted

#7D7C83

Preview Lab

Preview with #4257CE

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

Preview Lab → · Contrast checker → · Palette generator →