#4243B3#4243B3

#4243B3 is a mid, vivid blue. Relative luminance 0.084; OKLCH L 45.2% C 0.173 H 276.6°. Best body text is #FFFFFF at 7.82:1 contrast (WCAG AA passes).

Color values

HEX#4243B3
RGBrgb(66, 67, 179)
HSLhsl(239, 46%, 48%)
HSVhsv(239, 63%, 70%)
CMYKcmyk(63.1%, 62.6%, 0%, 29.8%)
CIE-LABlab(34.86, 34.30, -59.75)
CIE-LCHlch(34.86, 68.89, 299.86°)
OKLaboklab(45.24% 0.0198 -0.1721)
OKLCHoklch(45.24% 0.173 276.6)
XYZxyz(12.3880, 8.4262, 43.6127)
Luminance0.0843 (WCAG relative)
Temperaturecool
Familyblue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#4243B3 #B3B242
analogous
#427BB3 #4243B3 #7942B3
triadic
#4243B3 #B34243 #43B342
tetradic
#4243B3 #B3427B #B3B242 #42B379
square
#4243B3 #B3427B #B3B242 #42B379
split-complementary
#4243B3 #B37942 #7BB342
monochromatic
#21225A #323286 #4243B3 #6A6BC8 #9797D9

Accessibility & contrast

On white

7.82
#4243B3 on #FFFFFF
AA ✓AA large ✓AAA ✓

On black

2.69
#4243B3 on #000000
AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #4243B3
7.82:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##4243B3#FFFFFF#000000##FFFFFF
##4243B31.007.822.697.82
#FFFFFF7.821.0021.001.00
#0000002.6921.001.0021.00
##FFFFFF7.821.0021.001.00

Color blindness preview

Protanopia (red-blind)
#0057B7
Deuteranopia (green-blind)
#004DB1
Tritanopia (blue-blind)
#005F74
Achromatopsia (no color)
#525252

Design tokens & code

CSS
--color: #4243b3;
/* rgb */ color: rgb(66, 67, 179);
/* oklch */ color: oklch(45.2% 0.173 276.6);
Tailwind
colors: {
  custom: {
    50: '#8377cb',
    500: '#4243b3',
    950: '#000000',
  },
}
SCSS
$custom: #4243b3;
$custom-light: #8377cb;
$custom-dark: #000000;
JSON
{
  "hex": "#4243b3",
  "rgb": {
    "r": 66,
    "g": 67,
    "b": 179
  },
  "hsl": {
    "h": 239.469,
    "s": 46.122,
    "l": 48.039
  },
  "oklch": {
    "l": 0.4524,
    "c": 0.1732,
    "h": 276.6
  },
  "luminance": 0.08427
}

Semantic roles & 50–950 ramp

primary
#4243B3
secondary
#C4C48C
accent
#D552D6
background
#F8F7FC
surface
#F0EDF9
border
#CBC8D2
text
#0C0813
muted
#7D7B82

Preview Lab

Preview with #4243B3

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

Preview Lab → · Contrast checker → · Palette generator →

#4243B3 Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva