#4243A3#4243A3

#4243A3 is a dark, vivid blue. Relative luminance 0.078; OKLCH L 43.9% C 0.151 H 277.7°. Best body text is #FFFFFF at 8.19:1 contrast (WCAG AA passes).

Color values

HEX	#4243A3
RGB	rgb(66, 67, 163)
HSL	hsl(239, 42%, 45%)
HSV	hsv(239, 60%, 64%)
CMYK	cmyk(59.5%, 58.9%, 0%, 36.1%)
CIE-LAB	lab(33.60, 28.86, -52.24)
CIE-LCH	lch(33.60, 59.69, 298.92°)
OKLab	oklab(43.92% 0.0203 -0.15)
OKLCH	oklch(43.92% 0.151 277.7)
XYZ	xyz(10.8627, 7.8161, 35.5795)
Luminance	0.0782 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

#533CC6

ΔE00 6.31

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4243A3 #A3A242

analogous

#4274A3 #4243A3 #7142A3

triadic

#4243A3 #A34243 #43A342

tetradic

#4243A3 #A34274 #A3A242 #42A371

square

#4243A3 #A34274 #A3A242 #42A371

split-complementary

#4243A3 #A37142 #74A342

monochromatic

#1F1F4C #303177 #4243A3 #6364C0 #8E8FD1

Accessibility & contrast

On white

8.19

#4243A3 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.56

#4243A3 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #4243A3

8.19:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4243A3	#FFFFFF	#000000	##FFFFFF
##4243A3	1.00	8.19	2.56	8.19
#FFFFFF	8.19	1.00	21.00	1.00
#000000	2.56	21.00	1.00	21.00
##FFFFFF	8.19	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0053A6

Deuteranopia (green-blind)

#004BA1

Tritanopia (blue-blind)

#005A6C

Achromatopsia (no color)

#4F4F4F

Design tokens & code

CSS

--color: #4243a3;
/* rgb */ color: rgb(66, 67, 163);
/* oklch */ color: oklch(43.9% 0.151 277.7);

Tailwind

colors: {
  custom: {
    50: '#8077bf',
    500: '#4243a3',
    950: '#000000',
  },
}

SCSS

$custom: #4243a3;
$custom-light: #8077bf;
$custom-dark: #000000;

JSON

{
  "hex": "#4243a3",
  "rgb": {
    "r": 66,
    "g": 67,
    "b": 163
  },
  "hsl": {
    "h": 239.381,
    "s": 42.358,
    "l": 44.902
  },
  "oklch": {
    "l": 0.43918,
    "c": 0.15138,
    "h": 277.7
  },
  "luminance": 0.07817
}

Semantic roles & 50–950 ramp

primary

#4243A3

secondary

#BCBC84

accent

#D156D2

background

#F8F7FB

surface

#EFEDF7

border

#CAC8D0

text

#0B0812

muted

#7C7B81

Preview Lab

Preview with #4243A3

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

Preview Lab → · Contrast checker → · Palette generator →