#4243C0#4243C0

#4243C0 is a mid, vivid blue. Relative luminance 0.090; OKLCH L 46.4% C 0.190 H 275.7°. Best body text is #FFFFFF at 7.51:1 contrast (WCAG AA passes).

Color values

HEX#4243C0
RGBrgb(66, 67, 192)
HSLhsl(240, 50%, 51%)
HSVhsv(240, 66%, 75%)
CMYKcmyk(65.6%, 65.1%, 0%, 24.7%)
CIE-LABlab(35.94, 38.69, -65.63)
CIE-LCHlch(35.94, 76.19, 300.52°)
OKLaboklab(46.37% 0.0189 -0.1893)
OKLCHoklch(46.37% 0.19 275.7)
XYZxyz(13.7652, 8.9771, 50.8663)
Luminance0.0898 (WCAG relative)
Temperaturecool
Familyblue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#4243C0 #C0BF42
analogous
#4282C0 #4243C0 #8042C0
triadic
#4243C0 #C04243 #43C042
tetradic
#4243C0 #C04282 #C0BF42 #42C080
square
#4243C0 #C04282 #C0BF42 #42C080
split-complementary
#4243C0 #C08042 #82C042
monochromatic
#222266 #313294 #4243C0 #7071CF #9E9EDF

Accessibility & contrast

On white

7.51
#4243C0 on #FFFFFF
AA ✓AA large ✓AAA ✓

On black

2.80
#4243C0 on #000000
AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #4243C0
7.51:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##4243C0#FFFFFF#000000##FFFFFF
##4243C01.007.512.807.51
#FFFFFF7.511.0021.001.00
#0000002.8021.001.0021.00
##FFFFFF7.511.0021.001.00

Color blindness preview

Protanopia (red-blind)
#005AC4
Deuteranopia (green-blind)
#004FBE
Tritanopia (blue-blind)
#00637B
Achromatopsia (no color)
#555555

Design tokens & code

CSS
--color: #4243c0;
/* rgb */ color: rgb(66, 67, 192);
/* oklch */ color: oklch(46.4% 0.190 275.7);
Tailwind
colors: {
  custom: {
    50: '#8577d4',
    500: '#4243c0',
    950: '#000000',
  },
}
SCSS
$custom: #4243c0;
$custom-light: #8577d4;
$custom-dark: #000000;
JSON
{
  "hex": "#4243c0",
  "rgb": {
    "r": 66,
    "g": 67,
    "b": 192
  },
  "hsl": {
    "h": 239.524,
    "s": 50,
    "l": 50.588
  },
  "oklch": {
    "l": 0.4637,
    "c": 0.19027,
    "h": 275.7
  },
  "luminance": 0.08978
}

Semantic roles & 50–950 ramp

primary
#4243C0
secondary
#CBCA93
accent
#D84EDA
background
#F8F7FD
surface
#F0EDFA
border
#CBC8D3
text
#0C0914
muted
#7D7B83

Preview Lab

Preview with #4243C0

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

Preview Lab → · Contrast checker → · Palette generator →

#4243C0 Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva