#4243E0#4243E0

#4243E0 is a mid, highly saturated blue. Relative luminance 0.106; OKLCH L 49.3% C 0.230 H 273.7°. Best body text is #FFFFFF at 6.75:1 contrast (WCAG AA passes).

Color values

HEX	#4243E0
RGB	rgb(66, 67, 224)
HSL	hsl(240, 72%, 57%)
HSV	hsv(240, 71%, 88%)
CMYK	cmyk(70.5%, 70.1%, 0%, 12.2%)
CIE-LAB	lab(38.82, 49.27, -79.42)
CIE-LCH	lch(38.82, 93.46, 301.82°)
OKLab	oklab(49.33% 0.015 -0.2296)
OKLCH	oklch(49.33% 0.23 273.7)
XYZ	xyz(17.7040, 10.5526, 71.6104)
Luminance	0.1055 (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

#4243E0 #E0DF42

analogous

#4292E0 #4243E0 #9042E0

triadic

#4243E0 #E04243 #43E042

tetradic

#4243E0 #E04292 #E0DF42 #42E090

square

#4243E0 #E04292 #E0DF42 #42E090

split-complementary

#4243E0 #E09042 #92E042

monochromatic

#181890 #2021C5 #4243E0 #7777E9 #ABACF1

Accessibility & contrast

On white

6.75

#4243E0 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.11

#4243E0 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #4243E0

6.75:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4243E0	#FFFFFF	#000000	##FFFFFF
##4243E0	1.00	6.75	3.11	6.75
#FFFFFF	6.75	1.00	21.00	1.00
#000000	3.11	21.00	1.00	21.00
##FFFFFF	6.75	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0063E5

Deuteranopia (green-blind)

#0054DD

Tritanopia (blue-blind)

#006F8D

Achromatopsia (no color)

#5B5B5B

Design tokens & code

CSS

--color: #4243e0;
/* rgb */ color: rgb(66, 67, 224);
/* oklch */ color: oklch(49.3% 0.230 273.7);

Tailwind

colors: {
  custom: {
    50: '#8c78eb',
    500: '#4243e0',
    950: '#000000',
  },
}

SCSS

$custom: #4243e0;
$custom-light: #8c78eb;
$custom-dark: #000000;

JSON

{
  "hex": "#4243e0",
  "rgb": {
    "r": 66,
    "g": 67,
    "b": 224
  },
  "hsl": {
    "h": 239.62,
    "s": 71.818,
    "l": 56.863
  },
  "oklch": {
    "l": 0.49325,
    "c": 0.23013,
    "h": 273.7
  },
  "luminance": 0.10554
}

Semantic roles & 50–950 ramp

primary

#4243E0

secondary

#DFDF9F

accent

#ED39EF

background

#F9F7FE

surface

#F2EDFD

border

#CCC8D5

text

#0E0916

muted

#7E7B84

Preview Lab

Preview with #4243E0

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

Preview Lab → · Contrast checker → · Palette generator →