#4243B3#4243B3

#4243B3 is a mid, vivid blue. Relative luminance 0.084; OKLCH L 45.2% C 0.173 H 276.6°. Best body text is #FFFFFF at 7.82:1 contrast (WCAG AA passes).

Color values

HEX	#4243B3
RGB	rgb(66, 67, 179)
HSL	hsl(239, 46%, 48%)
HSV	hsv(239, 63%, 70%)
CMYK	cmyk(63.1%, 62.6%, 0%, 29.8%)
CIE-LAB	lab(34.86, 34.30, -59.75)
CIE-LCH	lch(34.86, 68.89, 299.86°)
OKLab	oklab(45.24% 0.0198 -0.1721)
OKLCH	oklch(45.24% 0.173 276.6)
XYZ	xyz(12.3880, 8.4262, 43.6127)
Luminance	0.0843 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4243B3 #B3B242

analogous

#427BB3 #4243B3 #7942B3

triadic

#4243B3 #B34243 #43B342

tetradic

#4243B3 #B3427B #B3B242 #42B379

square

#4243B3 #B3427B #B3B242 #42B379

split-complementary

#4243B3 #B37942 #7BB342

monochromatic

#21225A #323286 #4243B3 #6A6BC8 #9797D9

Accessibility & contrast

On white

7.82

#4243B3 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.69

#4243B3 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #4243B3

7.82:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4243B3	#FFFFFF	#000000	##FFFFFF
##4243B3	1.00	7.82	2.69	7.82
#FFFFFF	7.82	1.00	21.00	1.00
#000000	2.69	21.00	1.00	21.00
##FFFFFF	7.82	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0057B7

Deuteranopia (green-blind)

#004DB1

Tritanopia (blue-blind)

#005F74

Achromatopsia (no color)

#525252

Design tokens & code

CSS

--color: #4243b3;
/* rgb */ color: rgb(66, 67, 179);
/* oklch */ color: oklch(45.2% 0.173 276.6);

Tailwind

colors: {
  custom: {
    50: '#8377cb',
    500: '#4243b3',
    950: '#000000',
  },
}

SCSS

$custom: #4243b3;
$custom-light: #8377cb;
$custom-dark: #000000;

JSON

{
  "hex": "#4243b3",
  "rgb": {
    "r": 66,
    "g": 67,
    "b": 179
  },
  "hsl": {
    "h": 239.469,
    "s": 46.122,
    "l": 48.039
  },
  "oklch": {
    "l": 0.4524,
    "c": 0.1732,
    "h": 276.6
  },
  "luminance": 0.08427
}

Semantic roles & 50–950 ramp

primary

#4243B3

secondary

#C4C48C

accent

#D552D6

background

#F8F7FC

surface

#F0EDF9

border

#CBC8D2

text

#0C0813

muted

#7D7B82

Preview Lab

Preview with #4243B3

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

Preview Lab → · Contrast checker → · Palette generator →