#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
RGBrgb(66, 67, 221)
HSLhsl(240, 70%, 56%)
HSVhsv(240, 70%, 87%)
CMYKcmyk(70.1%, 69.7%, 0%, 13.3%)
CIE-LABlab(38.54, 48.30, -78.16)
CIE-LCHlch(38.54, 91.88, 301.71°)
OKLaboklab(49.04% 0.0155 -0.226)
OKLCHoklch(49.04% 0.227 273.9)
XYZxyz(17.3007, 10.3913, 69.4866)
Luminance0.1039 (WCAG relative)
Temperaturecool
Familyblue

Closest named colors

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
##4243DD1.006.823.086.82
#FFFFFF6.821.0021.001.00
#0000003.0821.001.0021.00
##FFFFFF6.821.0021.001.00

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 →

#4243DD Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva