#4243CD#4243CD

#4243CD is a mid, highly saturated blue. Relative luminance 0.096; OKLCH L 47.5% C 0.207 H 274.9°. Best body text is #FFFFFF at 7.20:1 contrast (WCAG AA passes).

Color values

HEX	#4243CD
RGB	rgb(66, 67, 205)
HSL	hsl(240, 58%, 53%)
HSV	hsv(240, 68%, 80%)
CMYK	cmyk(67.8%, 67.3%, 0%, 19.6%)
CIE-LAB	lab(37.08, 43.04, -71.35)
CIE-LCH	lch(37.08, 83.32, 301.10°)
OKLab	oklab(47.54% 0.0175 -0.2061)
OKLCH	oklch(47.54% 0.207 274.9)
XYZ	xyz(15.2697, 9.5789, 58.7900)
Luminance	0.0958 (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

#4243CD #CDCC42

analogous

#4289CD #4243CD #8642CD

triadic

#4243CD #CD4243 #43CD42

tetradic

#4243CD #CD4289 #CDCC42 #42CD86

square

#4243CD #CD4289 #CDCC42 #42CD86

split-complementary

#4243CD #CD8642 #89CD42

monochromatic

#1F2076 #2C2DA6 #4243CD #7273DA #A3A3E7

Accessibility & contrast

On white

7.20

#4243CD on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.92

#4243CD on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #4243CD

7.20:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4243CD	#FFFFFF	#000000	##FFFFFF
##4243CD	1.00	7.20	2.92	7.20
#FFFFFF	7.20	1.00	21.00	1.00
#000000	2.92	21.00	1.00	21.00
##FFFFFF	7.20	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005ED1

Deuteranopia (green-blind)

#0051CA

Tritanopia (blue-blind)

#006882

Achromatopsia (no color)

#575757

Design tokens & code

CSS

--color: #4243cd;
/* rgb */ color: rgb(66, 67, 205);
/* oklch */ color: oklch(47.5% 0.207 274.9);

Tailwind

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

SCSS

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

JSON

{
  "hex": "#4243cd",
  "rgb": {
    "r": 66,
    "g": 67,
    "b": 205
  },
  "hsl": {
    "h": 239.568,
    "s": 58.159,
    "l": 53.137
  },
  "oklch": {
    "l": 0.47543,
    "c": 0.20681,
    "h": 274.9
  },
  "luminance": 0.0958
}

Semantic roles & 50–950 ramp

primary

#4243CD

secondary

#D3D397

accent

#E046E1

background

#F9F7FD

surface

#F1EDFB

border

#CBC8D4

text

#0D0915

muted

#7E7B83

Preview Lab

Preview with #4243CD

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

Preview Lab → · Contrast checker → · Palette generator →