#4257AF#4257AF

#4257AF is a mid, vivid blue. Relative luminance 0.111; OKLCH L 48.8% C 0.142 H 270.3°. Best body text is #FFFFFF at 6.53:1 contrast (WCAG AA passes).

Color values

HEX	#4257AF
RGB	rgb(66, 87, 175)
HSL	hsl(228, 45%, 47%)
HSV	hsv(228, 62%, 69%)
CMYK	cmyk(62.3%, 50.3%, 0%, 31.4%)
CIE-LAB	lab(39.70, 20.10, -49.54)
CIE-LCH	lch(39.70, 53.46, 292.08°)
OKLab	oklab(48.76% 0.0007 -0.1418)
OKLCH	oklch(48.76% 0.142 270.3)
XYZ	xyz(13.3902, 11.0687, 41.9800)
Luminance	0.1107 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4257AF #AF9A42

analogous

#428EAF #4257AF #6342AF

triadic

#4257AF #AF4257 #57AF42

tetradic

#4257AF #AF428E #AF9A42 #42AF63

square

#4257AF #AF428E #AF9A42 #42AF63

split-complementary

#4257AF #AF6342 #8EAF42

monochromatic

#202B56 #314183 #4257AF #687AC6 #95A1D7

Accessibility & contrast

On white

6.53

#4257AF on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.21

#4257AF on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #4257AF

6.53:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4257AF	#FFFFFF	#000000	##FFFFFF
##4257AF	1.00	6.53	3.21	6.53
#FFFFFF	6.53	1.00	21.00	1.00
#000000	3.21	21.00	1.00	21.00
##FFFFFF	6.53	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2863B2

Deuteranopia (green-blind)

#0E59AD

Tritanopia (blue-blind)

#006B7B

Achromatopsia (no color)

#5E5E5E

Design tokens & code

CSS

--color: #4257af;
/* rgb */ color: rgb(66, 87, 175);
/* oklch */ color: oklch(48.8% 0.142 270.3);

Tailwind

colors: {
  custom: {
    50: '#8186c7',
    500: '#4257af',
    950: '#000000',
  },
}

SCSS

$custom: #4257af;
$custom-light: #8186c7;
$custom-dark: #000000;

JSON

{
  "hex": "#4257af",
  "rgb": {
    "r": 66,
    "g": 87,
    "b": 175
  },
  "hsl": {
    "h": 228.44,
    "s": 45.228,
    "l": 47.255
  },
  "oklch": {
    "l": 0.48761,
    "c": 0.14183,
    "h": 270.3
  },
  "luminance": 0.1107
}

Semantic roles & 50–950 ramp

primary

#4257AF

secondary

#C2B88A

accent

#BC53D5

background

#F8F8FC

surface

#EFEFF8

border

#CACAD1

text

#0B0B13

muted

#7C7C82

Preview Lab

Preview with #4257AF

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

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