#4243CE#4243CE

#4243CE is a mid, highly saturated blue. Relative luminance 0.096; OKLCH L 47.6% C 0.208 H 274.8°. Best body text is #FFFFFF at 7.18:1 contrast (WCAG AA passes).

Color values

HEX	#4243CE
RGB	rgb(66, 67, 206)
HSL	hsl(240, 59%, 53%)
HSV	hsv(240, 68%, 81%)
CMYK	cmyk(68%, 67.5%, 0%, 19.2%)
CIE-LAB	lab(37.17, 43.37, -71.78)
CIE-LCH	lch(37.17, 83.86, 301.14°)
OKLab	oklab(47.64% 0.0174 -0.2073)
OKLCH	oklch(47.64% 0.208 274.8)
XYZ	xyz(15.3908, 9.6274, 59.4277)
Luminance	0.0963 (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

#4243CE #CECD42

analogous

#4289CE #4243CE #8742CE

triadic

#4243CE #CE4243 #43CE42

tetradic

#4243CE #CE4289 #CECD42 #42CE87

square

#4243CE #CE4289 #CECD42 #42CE87

split-complementary

#4243CE #CE8742 #89CE42

monochromatic

#1F1F77 #2B2CA7 #4243CE #7373DB #A3A4E7

Accessibility & contrast

On white

7.18

#4243CE on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.93

#4243CE on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #4243CE

7.18:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4243CE	#FFFFFF	#000000	##FFFFFF
##4243CE	1.00	7.18	2.93	7.18
#FFFFFF	7.18	1.00	21.00	1.00
#000000	2.93	21.00	1.00	21.00
##FFFFFF	7.18	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005ED2

Deuteranopia (green-blind)

#0051CB

Tritanopia (blue-blind)

#006883

Achromatopsia (no color)

#575757

Design tokens & code

CSS

--color: #4243ce;
/* rgb */ color: rgb(66, 67, 206);
/* oklch */ color: oklch(47.6% 0.208 274.8);

Tailwind

colors: {
  custom: {
    50: '#8878de',
    500: '#4243ce',
    950: '#000000',
  },
}

SCSS

$custom: #4243ce;
$custom-light: #8878de;
$custom-dark: #000000;

JSON

{
  "hex": "#4243ce",
  "rgb": {
    "r": 66,
    "g": 67,
    "b": 206
  },
  "hsl": {
    "h": 239.571,
    "s": 58.824,
    "l": 53.333
  },
  "oklch": {
    "l": 0.47635,
    "c": 0.20807,
    "h": 274.8
  },
  "luminance": 0.09629
}

Semantic roles & 50–950 ramp

primary

#4243CE

secondary

#D4D498

accent

#E146E2

background

#F9F7FD

surface

#F1EDFB

border

#CBC8D4

text

#0D0915

muted

#7E7B83

Preview Lab

Preview with #4243CE

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

Preview Lab → · Contrast checker → · Palette generator →