#4257AC#4257AC

#4257AC is a mid, vivid blue. Relative luminance 0.110; OKLCH L 48.5% C 0.138 H 270.2°. Best body text is #FFFFFF at 6.58:1 contrast (WCAG AA passes).

Color values

HEX	#4257AC
RGB	rgb(66, 87, 172)
HSL	hsl(228, 45%, 47%)
HSV	hsv(228, 62%, 67%)
CMYK	cmyk(61.6%, 49.4%, 0%, 32.5%)
CIE-LAB	lab(39.50, 19.04, -48.08)
CIE-LCH	lch(39.50, 51.71, 291.61°)
OKLab	oklab(48.55% 0.0004 -0.1375)
OKLCH	oklch(48.55% 0.138 270.2)
XYZ	xyz(13.0989, 10.9521, 40.4454)
Luminance	0.1095 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4257AC #AC9742

analogous

#428CAC #4257AC #6242AC

triadic

#4257AC #AC4257 #57AC42

tetradic

#4257AC #AC428C #AC9742 #42AC62

square

#4257AC #AC428C #AC9742 #42AC62

split-complementary

#4257AC #AC6242 #8CAC42

monochromatic

#202A54 #314180 #4257AC #6779C5 #93A0D6

Accessibility & contrast

On white

6.58

#4257AC on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.19

#4257AC on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #4257AC

6.58:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4257AC	#FFFFFF	#000000	##FFFFFF
##4257AC	1.00	6.58	3.19	6.58
#FFFFFF	6.58	1.00	21.00	1.00
#000000	3.19	21.00	1.00	21.00
##FFFFFF	6.58	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2B62AF

Deuteranopia (green-blind)

#1659AA

Tritanopia (blue-blind)

#006A79

Achromatopsia (no color)

#5D5D5D

Design tokens & code

CSS

--color: #4257ac;
/* rgb */ color: rgb(66, 87, 172);
/* oklch */ color: oklch(48.5% 0.138 270.2);

Tailwind

colors: {
  custom: {
    50: '#8086c5',
    500: '#4257ac',
    950: '#000000',
  },
}

SCSS

$custom: #4257ac;
$custom-light: #8086c5;
$custom-dark: #000000;

JSON

{
  "hex": "#4257ac",
  "rgb": {
    "r": 66,
    "g": 87,
    "b": 172
  },
  "hsl": {
    "h": 228.113,
    "s": 44.538,
    "l": 46.667
  },
  "oklch": {
    "l": 0.48549,
    "c": 0.13754,
    "h": 270.2
  },
  "luminance": 0.10953
}

Semantic roles & 50–950 ramp

primary

#4257AC

secondary

#C1B689

accent

#BB54D4

background

#F8F8FC

surface

#EFEFF8

border

#CACAD1

text

#0B0B13

muted

#7C7C82

Preview Lab

Preview with #4257AC

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

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