#4243A5#4243A5

#4243A5 is a dark, vivid blue. Relative luminance 0.079; OKLCH L 44.1% C 0.154 H 277.6°. Best body text is #FFFFFF at 8.15:1 contrast (WCAG AA passes).

Color values

HEX	#4243A5
RGB	rgb(66, 67, 165)
HSL	hsl(239, 43%, 45%)
HSV	hsv(239, 60%, 65%)
CMYK	cmyk(60%, 59.4%, 0%, 35.3%)
CIE-LAB	lab(33.75, 29.54, -53.20)
CIE-LCH	lch(33.75, 60.85, 299.05°)
OKLab	oklab(44.08% 0.0203 -0.1528)
OKLCH	oklch(44.08% 0.154 277.6)
XYZ	xyz(11.0433, 7.8884, 36.5307)
Luminance	0.0789 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

#533CC6

ΔE00 6.05

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4243A5 #A5A442

analogous

#4274A5 #4243A5 #7242A5

triadic

#4243A5 #A54243 #43A542

tetradic

#4243A5 #A54274 #A5A442 #42A572

square

#4243A5 #A54274 #A5A442 #42A572

split-complementary

#4243A5 #A57242 #74A542

monochromatic

#1F1F4E #313179 #4243A5 #6364C1 #8F90D2

Accessibility & contrast

On white

8.15

#4243A5 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.58

#4243A5 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #4243A5

8.15:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4243A5	#FFFFFF	#000000	##FFFFFF
##4243A5	1.00	8.15	2.58	8.15
#FFFFFF	8.15	1.00	21.00	1.00
#000000	2.58	21.00	1.00	21.00
##FFFFFF	8.15	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0054A8

Deuteranopia (green-blind)

#004BA3

Tritanopia (blue-blind)

#005B6D

Achromatopsia (no color)

#4F4F4F

Design tokens & code

CSS

--color: #4243a5;
/* rgb */ color: rgb(66, 67, 165);
/* oklch */ color: oklch(44.1% 0.154 277.6);

Tailwind

colors: {
  custom: {
    50: '#8077c0',
    500: '#4243a5',
    950: '#000000',
  },
}

SCSS

$custom: #4243a5;
$custom-light: #8077c0;
$custom-dark: #000000;

JSON

{
  "hex": "#4243a5",
  "rgb": {
    "r": 66,
    "g": 67,
    "b": 165
  },
  "hsl": {
    "h": 239.394,
    "s": 42.857,
    "l": 45.294
  },
  "oklch": {
    "l": 0.44079,
    "c": 0.15415,
    "h": 277.6
  },
  "luminance": 0.07889
}

Semantic roles & 50–950 ramp

primary

#4243A5

secondary

#BDBD85

accent

#D155D3

background

#F8F7FB

surface

#EFEDF7

border

#CAC8D0

text

#0B0812

muted

#7C7B81

Preview Lab

Preview with #4243A5

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

Preview Lab → · Contrast checker → · Palette generator →