#4243D4#4243D4

#4243D4 is a mid, highly saturated blue. Relative luminance 0.099; OKLCH L 48.2% C 0.216 H 274.4°. Best body text is #FFFFFF at 7.03:1 contrast (WCAG AA passes).

Color values

HEX	#4243D4
RGB	rgb(66, 67, 212)
HSL	hsl(240, 63%, 55%)
HSV	hsv(240, 69%, 83%)
CMYK	cmyk(68.9%, 68.4%, 0%, 16.9%)
CIE-LAB	lab(37.71, 45.35, -74.36)
CIE-LCH	lch(37.71, 87.10, 301.38°)
OKLab	oklab(48.19% 0.0167 -0.2149)
OKLCH	oklch(48.19% 0.216 274.4)
XYZ	xyz(16.1336, 9.9245, 63.3400)
Luminance	0.0993 (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

#4243D4 #D4D342

analogous

#428CD4 #4243D4 #8A42D4

triadic

#4243D4 #D44243 #43D442

tetradic

#4243D4 #D4428C #D4D342 #42D48A

square

#4243D4 #D4428C #D4D342 #42D48A

split-complementary

#4243D4 #D48A42 #8CD442

monochromatic

#1D1E7F #2829B1 #4243D4 #7475DF #A6A6EB

Accessibility & contrast

On white

7.03

#4243D4 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.99

#4243D4 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #4243D4

7.03:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4243D4	#FFFFFF	#000000	##FFFFFF
##4243D4	1.00	7.03	2.99	7.03
#FFFFFF	7.03	1.00	21.00	1.00
#000000	2.99	21.00	1.00	21.00
##FFFFFF	7.03	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005FD8

Deuteranopia (green-blind)

#0052D1

Tritanopia (blue-blind)

#006A86

Achromatopsia (no color)

#595959

Design tokens & code

CSS

--color: #4243d4;
/* rgb */ color: rgb(66, 67, 212);
/* oklch */ color: oklch(48.2% 0.216 274.4);

Tailwind

colors: {
  custom: {
    50: '#8978e2',
    500: '#4243d4',
    950: '#000000',
  },
}

SCSS

$custom: #4243d4;
$custom-light: #8978e2;
$custom-dark: #000000;

JSON

{
  "hex": "#4243d4",
  "rgb": {
    "r": 66,
    "g": 67,
    "b": 212
  },
  "hsl": {
    "h": 239.589,
    "s": 62.931,
    "l": 54.51
  },
  "oklch": {
    "l": 0.48191,
    "c": 0.21551,
    "h": 274.4
  },
  "luminance": 0.09926
}

Semantic roles & 50–950 ramp

primary

#4243D4

secondary

#D8D79A

accent

#E542E6

background

#F9F7FE

surface

#F2EDFC

border

#CCC8D5

text

#0D0916

muted

#7E7B84

Preview Lab

Preview with #4243D4

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

Preview Lab → · Contrast checker → · Palette generator →