#4243DD#4243DD

#4243DD is a mid, highly saturated blue. Relative luminance 0.104; OKLCH L 49.0% C 0.227 H 273.9°. Best body text is #FFFFFF at 6.82:1 contrast (WCAG AA passes).

Color values

HEX	#4243DD
RGB	rgb(66, 67, 221)
HSL	hsl(240, 70%, 56%)
HSV	hsv(240, 70%, 87%)
CMYK	cmyk(70.1%, 69.7%, 0%, 13.3%)
CIE-LAB	lab(38.54, 48.30, -78.16)
CIE-LCH	lch(38.54, 91.88, 301.71°)
OKLab	oklab(49.04% 0.0155 -0.226)
OKLCH	oklch(49.04% 0.227 273.9)
XYZ	xyz(17.3007, 10.3913, 69.4866)
Luminance	0.1039 (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

#4243DD #DDDC42

analogous

#4291DD #4243DD #8F42DD

triadic

#4243DD #DD4243 #43DD42

tetradic

#4243DD #DD4291 #DDDC42 #42DD8F

square

#4243DD #DD4291 #DDDC42 #42DD8F

split-complementary

#4243DD #DD8F42 #91DD42

monochromatic

#191A8C #2223BF #4243DD #7677E6 #AAAAF0

Accessibility & contrast

On white

6.82

#4243DD on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.08

#4243DD on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #4243DD

6.82:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4243DD	#FFFFFF	#000000	##FFFFFF
##4243DD	1.00	6.82	3.08	6.82
#FFFFFF	6.82	1.00	21.00	1.00
#000000	3.08	21.00	1.00	21.00
##FFFFFF	6.82	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0062E2

Deuteranopia (green-blind)

#0053DA

Tritanopia (blue-blind)

#006E8B

Achromatopsia (no color)

#5B5B5B

Design tokens & code

CSS

--color: #4243dd;
/* rgb */ color: rgb(66, 67, 221);
/* oklch */ color: oklch(49.0% 0.227 273.9);

Tailwind

colors: {
  custom: {
    50: '#8b78e9',
    500: '#4243dd',
    950: '#000000',
  },
}

SCSS

$custom: #4243dd;
$custom-light: #8b78e9;
$custom-dark: #000000;

JSON

{
  "hex": "#4243dd",
  "rgb": {
    "r": 66,
    "g": 67,
    "b": 221
  },
  "hsl": {
    "h": 239.613,
    "s": 69.507,
    "l": 56.275
  },
  "oklch": {
    "l": 0.49039,
    "c": 0.22652,
    "h": 273.9
  },
  "luminance": 0.10393
}

Semantic roles & 50–950 ramp

primary

#4243DD

secondary

#DDDD9D

accent

#EB3BEC

background

#F9F7FE

surface

#F2EDFD

border

#CCC8D5

text

#0E0916

muted

#7E7B84

Preview Lab

Preview with #4243DD

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

Preview Lab → · Contrast checker → · Palette generator →