#4243CC#4243CC

#4243CC is a mid, highly saturated blue. Relative luminance 0.095; OKLCH L 47.5% C 0.206 H 274.9°. Best body text is #FFFFFF at 7.23:1 contrast (WCAG AA passes).

Color values

HEX	#4243CC
RGB	rgb(66, 67, 204)
HSL	hsl(240, 58%, 53%)
HSV	hsv(240, 68%, 80%)
CMYK	cmyk(67.6%, 67.2%, 0%, 20%)
CIE-LAB	lab(36.99, 42.70, -70.91)
CIE-LCH	lch(36.99, 82.78, 301.06°)
OKLab	oklab(47.45% 0.0176 -0.2048)
OKLCH	oklch(47.45% 0.206 274.9)
XYZ	xyz(15.1494, 9.5308, 58.1563)
Luminance	0.0953 (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

#4243CC #CCCB42

analogous

#4288CC #4243CC #8642CC

triadic

#4243CC #CC4243 #43CC42

tetradic

#4243CC #CC4288 #CCCB42 #42CC86

square

#4243CC #CC4288 #CCCB42 #42CC86

split-complementary

#4243CC #CC8642 #88CC42

monochromatic

#1F2074 #2C2DA4 #4243CC #7273D9 #A2A3E6

Accessibility & contrast

On white

7.23

#4243CC on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.91

#4243CC on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #4243CC

7.23:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4243CC	#FFFFFF	#000000	##FFFFFF
##4243CC	1.00	7.23	2.91	7.23
#FFFFFF	7.23	1.00	21.00	1.00
#000000	2.91	21.00	1.00	21.00
##FFFFFF	7.23	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005DD0

Deuteranopia (green-blind)

#0051C9

Tritanopia (blue-blind)

#006882

Achromatopsia (no color)

#575757

Design tokens & code

CSS

--color: #4243cc;
/* rgb */ color: rgb(66, 67, 204);
/* oklch */ color: oklch(47.5% 0.206 274.9);

Tailwind

colors: {
  custom: {
    50: '#8878dd',
    500: '#4243cc',
    950: '#000000',
  },
}

SCSS

$custom: #4243cc;
$custom-light: #8878dd;
$custom-dark: #000000;

JSON

{
  "hex": "#4243cc",
  "rgb": {
    "r": 66,
    "g": 67,
    "b": 204
  },
  "hsl": {
    "h": 239.565,
    "s": 57.5,
    "l": 52.941
  },
  "oklch": {
    "l": 0.47451,
    "c": 0.20556,
    "h": 274.9
  },
  "luminance": 0.09532
}

Semantic roles & 50–950 ramp

primary

#4243CC

secondary

#D3D297

accent

#E047E1

background

#F9F7FD

surface

#F1EDFB

border

#CBC8D4

text

#0D0915

muted

#7E7B83

Preview Lab

Preview with #4243CC

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

Preview Lab → · Contrast checker → · Palette generator →