#4243A4#4243A4

#4243A4 is a dark, vivid blue. Relative luminance 0.079; OKLCH L 44.0% C 0.153 H 277.6°. Best body text is #FFFFFF at 8.17:1 contrast (WCAG AA passes).

Color values

HEX	#4243A4
RGB	rgb(66, 67, 164)
HSL	hsl(239, 43%, 45%)
HSV	hsv(239, 60%, 64%)
CMYK	cmyk(59.8%, 59.1%, 0%, 35.7%)
CIE-LAB	lab(33.67, 29.20, -52.72)
CIE-LCH	lch(33.67, 60.27, 298.98°)
OKLab	oklab(44% 0.0203 -0.1514)
OKLCH	oklch(44% 0.153 277.6)
XYZ	xyz(10.9526, 7.8521, 36.0532)
Luminance	0.0785 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

#533CC6

ΔE00 6.18

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4243A4 #A4A342

analogous

#4274A4 #4243A4 #7242A4

triadic

#4243A4 #A44243 #43A442

tetradic

#4243A4 #A44274 #A4A342 #42A472

square

#4243A4 #A44274 #A4A342 #42A472

split-complementary

#4243A4 #A47242 #74A442

monochromatic

#1F1F4D #303178 #4243A4 #6364C0 #8F8FD2

Accessibility & contrast

On white

8.17

#4243A4 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.57

#4243A4 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #4243A4

8.17:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4243A4	#FFFFFF	#000000	##FFFFFF
##4243A4	1.00	8.17	2.57	8.17
#FFFFFF	8.17	1.00	21.00	1.00
#000000	2.57	21.00	1.00	21.00
##FFFFFF	8.17	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0053A7

Deuteranopia (green-blind)

#004BA2

Tritanopia (blue-blind)

#005A6D

Achromatopsia (no color)

#4F4F4F

Design tokens & code

CSS

--color: #4243a4;
/* rgb */ color: rgb(66, 67, 164);
/* oklch */ color: oklch(44.0% 0.153 277.6);

Tailwind

colors: {
  custom: {
    50: '#8077c0',
    500: '#4243a4',
    950: '#000000',
  },
}

SCSS

$custom: #4243a4;
$custom-light: #8077c0;
$custom-dark: #000000;

JSON

{
  "hex": "#4243a4",
  "rgb": {
    "r": 66,
    "g": 67,
    "b": 164
  },
  "hsl": {
    "h": 239.388,
    "s": 42.609,
    "l": 45.098
  },
  "oklch": {
    "l": 0.43999,
    "c": 0.15277,
    "h": 277.6
  },
  "luminance": 0.07853
}

Semantic roles & 50–950 ramp

primary

#4243A4

secondary

#BDBC85

accent

#D155D2

background

#F8F7FB

surface

#EFEDF7

border

#CAC8D0

text

#0B0812

muted

#7C7B81

Preview Lab

Preview with #4243A4

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

Preview Lab → · Contrast checker → · Palette generator →