#4243A2#4243A2

#4243A2 is a dark, vivid blue. Relative luminance 0.078; OKLCH L 43.8% C 0.150 H 277.8°. Best body text is #FFFFFF at 8.22:1 contrast (WCAG AA passes).

Color values

HEX	#4243A2
RGB	rgb(66, 67, 162)
HSL	hsl(239, 42%, 45%)
HSV	hsv(239, 59%, 64%)
CMYK	cmyk(59.3%, 58.6%, 0%, 36.5%)
CIE-LAB	lab(33.52, 28.52, -51.77)
CIE-LCH	lch(33.52, 59.10, 298.86°)
OKLab	oklab(43.84% 0.0203 -0.1486)
OKLCH	oklch(43.84% 0.15 277.8)
XYZ	xyz(10.7734, 7.7804, 35.1095)
Luminance	0.0778 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

#533CC6

ΔE00 6.45

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4243A2 #A2A142

analogous

#4273A2 #4243A2 #7142A2

triadic

#4243A2 #A24243 #43A242

tetradic

#4243A2 #A24273 #A2A142 #42A271

square

#4243A2 #A24273 #A2A142 #42A271

split-complementary

#4243A2 #A27142 #73A242

monochromatic

#1F1F4B #303177 #4243A2 #6263BF #8E8ED1

Accessibility & contrast

On white

8.22

#4243A2 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.56

#4243A2 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #4243A2

8.22:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4243A2	#FFFFFF	#000000	##FFFFFF
##4243A2	1.00	8.22	2.56	8.22
#FFFFFF	8.22	1.00	21.00	1.00
#000000	2.56	21.00	1.00	21.00
##FFFFFF	8.22	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0053A5

Deuteranopia (green-blind)

#004BA0

Tritanopia (blue-blind)

#005A6C

Achromatopsia (no color)

#4F4F4F

Design tokens & code

CSS

--color: #4243a2;
/* rgb */ color: rgb(66, 67, 162);
/* oklch */ color: oklch(43.8% 0.150 277.8);

Tailwind

colors: {
  custom: {
    50: '#8077be',
    500: '#4243a2',
    950: '#000000',
  },
}

SCSS

$custom: #4243a2;
$custom-light: #8077be;
$custom-dark: #000000;

JSON

{
  "hex": "#4243a2",
  "rgb": {
    "r": 66,
    "g": 67,
    "b": 162
  },
  "hsl": {
    "h": 239.375,
    "s": 42.105,
    "l": 44.706
  },
  "oklch": {
    "l": 0.43838,
    "c": 0.14998,
    "h": 277.8
  },
  "luminance": 0.07781
}

Semantic roles & 50–950 ramp

primary

#4243A2

secondary

#BCBB84

accent

#D156D2

background

#F8F7FB

surface

#EFEDF7

border

#CAC8D0

text

#0B0812

muted

#7C7B81

Preview Lab

Preview with #4243A2

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

Preview Lab → · Contrast checker → · Palette generator →