#4243E2#4243E2

#4243E2 is a mid, highly saturated blue. Relative luminance 0.107; OKLCH L 49.5% C 0.233 H 273.6°. Best body text is #FFFFFF at 6.70:1 contrast (WCAG AA passes).

Color values

HEX	#4243E2
RGB	rgb(66, 67, 226)
HSL	hsl(240, 73%, 57%)
HSV	hsv(240, 71%, 89%)
CMYK	cmyk(70.8%, 70.4%, 0%, 11.4%)
CIE-LAB	lab(39.00, 49.92, -80.25)
CIE-LCH	lch(39.00, 94.51, 301.88°)
OKLab	oklab(49.52% 0.0147 -0.2321)
OKLCH	oklch(49.52% 0.233 273.6)
XYZ	xyz(17.9768, 10.6618, 73.0473)
Luminance	0.1066 (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

#4243E2 #E2E142

analogous

#4293E2 #4243E2 #9142E2

triadic

#4243E2 #E24243 #43E242

tetradic

#4243E2 #E24293 #E2E142 #42E291

square

#4243E2 #E24293 #E2E142 #42E291

split-complementary

#4243E2 #E29142 #93E242

monochromatic

#171793 #1F20C8 #4243E2 #7778EA #ACADF2

Accessibility & contrast

On white

6.70

#4243E2 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.13

#4243E2 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #4243E2

6.70:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4243E2	#FFFFFF	#000000	##FFFFFF
##4243E2	1.00	6.70	3.13	6.70
#FFFFFF	6.70	1.00	21.00	1.00
#000000	3.13	21.00	1.00	21.00
##FFFFFF	6.70	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0063E7

Deuteranopia (green-blind)

#0054DF

Tritanopia (blue-blind)

#006F8E

Achromatopsia (no color)

#5C5C5C

Design tokens & code

CSS

--color: #4243e2;
/* rgb */ color: rgb(66, 67, 226);
/* oklch */ color: oklch(49.5% 0.233 273.6);

Tailwind

colors: {
  custom: {
    50: '#8c78ec',
    500: '#4243e2',
    950: '#000000',
  },
}

SCSS

$custom: #4243e2;
$custom-light: #8c78ec;
$custom-dark: #000000;

JSON

{
  "hex": "#4243e2",
  "rgb": {
    "r": 66,
    "g": 67,
    "b": 226
  },
  "hsl": {
    "h": 239.625,
    "s": 73.394,
    "l": 57.255
  },
  "oklch": {
    "l": 0.49517,
    "c": 0.23254,
    "h": 273.6
  },
  "luminance": 0.10664
}

Semantic roles & 50–950 ramp

primary

#4243E2

secondary

#E0E09F

accent

#EF38F0

background

#F9F7FE

surface

#F2EDFD

border

#CCC8D5

text

#0E0916

muted

#7E7B84

Preview Lab

Preview with #4243E2

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

Preview Lab → · Contrast checker → · Palette generator →