#4243CF#4243CF

#4243CF is a mid, highly saturated blue. Relative luminance 0.097; OKLCH L 47.7% C 0.209 H 274.7°. Best body text is #FFFFFF at 7.15:1 contrast (WCAG AA passes).

Color values

HEX#4243CF
RGBrgb(66, 67, 207)
HSLhsl(240, 59%, 54%)
HSVhsv(240, 68%, 81%)
CMYKcmyk(68.1%, 67.6%, 0%, 18.8%)
CIE-LABlab(37.25, 43.70, -72.21)
CIE-LCHlch(37.25, 84.41, 301.18°)
OKLaboklab(47.73% 0.0173 -0.2086)
OKLCHoklch(47.73% 0.209 274.7)
XYZxyz(15.5127, 9.6761, 60.0696)
Luminance0.0968 (WCAG relative)
Temperaturecool
Familyblue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#4243CF #CFCE42
analogous
#428ACF #4243CF #8742CF
triadic
#4243CF #CF4243 #43CF42
tetradic
#4243CF #CF428A #CFCE42 #42CF87
square
#4243CF #CF428A #CFCE42 #42CF87
split-complementary
#4243CF #CF8742 #8ACF42
monochromatic
#1F1F78 #2B2CA9 #4243CF #7374DB #A4A4E8

Accessibility & contrast

On white

7.15
#4243CF on #FFFFFF
AA ✓AA large ✓AAA ✓

On black

2.94
#4243CF on #000000
AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #4243CF
7.15:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##4243CF#FFFFFF#000000##FFFFFF
##4243CF1.007.152.947.15
#FFFFFF7.151.0021.001.00
#0000002.9421.001.0021.00
##FFFFFF7.151.0021.001.00

Color blindness preview

Protanopia (red-blind)
#005ED3
Deuteranopia (green-blind)
#0051CC
Tritanopia (blue-blind)
#006983
Achromatopsia (no color)
#585858

Design tokens & code

CSS
--color: #4243cf;
/* rgb */ color: rgb(66, 67, 207);
/* oklch */ color: oklch(47.7% 0.209 274.7);
Tailwind
colors: {
  custom: {
    50: '#8878df',
    500: '#4243cf',
    950: '#000000',
  },
}
SCSS
$custom: #4243cf;
$custom-light: #8878df;
$custom-dark: #000000;
JSON
{
  "hex": "#4243cf",
  "rgb": {
    "r": 66,
    "g": 67,
    "b": 207
  },
  "hsl": {
    "h": 239.574,
    "s": 59.494,
    "l": 53.529
  },
  "oklch": {
    "l": 0.47727,
    "c": 0.20931,
    "h": 274.7
  },
  "luminance": 0.09678
}

Semantic roles & 50–950 ramp

primary
#4243CF
secondary
#D5D498
accent
#E245E3
background
#F9F7FD
surface
#F1EDFB
border
#CBC8D4
text
#0D0915
muted
#7E7B83

Preview Lab

Preview with #4243CF

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

Preview Lab → · Contrast checker → · Palette generator →

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