#4243BF#4243BF

#4243BF is a mid, vivid blue. Relative luminance 0.089; OKLCH L 46.3% C 0.189 H 275.7°. Best body text is #FFFFFF at 7.54:1 contrast (WCAG AA passes).

Color values

HEX	#4243BF
RGB	rgb(66, 67, 191)
HSL	hsl(240, 49%, 50%)
HSV	hsv(240, 65%, 75%)
CMYK	cmyk(65.4%, 64.9%, 0%, 25.1%)
CIE-LAB	lab(35.85, 38.36, -65.19)
CIE-LCH	lch(35.85, 75.64, 300.47°)
OKLab	oklab(46.28% 0.0189 -0.188)
OKLCH	oklch(46.28% 0.189 275.7)
XYZ	xyz(13.6548, 8.9330, 50.2848)
Luminance	0.0893 (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

#4243BF #BFBE42

analogous

#4281BF #4243BF #7F42BF

triadic

#4243BF #BF4243 #43BF42

tetradic

#4243BF #BF4281 #BFBE42 #42BF7F

square

#4243BF #BF4281 #BFBE42 #42BF7F

split-complementary

#4243BF #BF7F42 #81BF42

monochromatic

#222365 #323292 #4243BF #7070CE #9D9EDE

Accessibility & contrast

On white

7.54

#4243BF on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.79

#4243BF on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #4243BF

7.54:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4243BF	#FFFFFF	#000000	##FFFFFF
##4243BF	1.00	7.54	2.79	7.54
#FFFFFF	7.54	1.00	21.00	1.00
#000000	2.79	21.00	1.00	21.00
##FFFFFF	7.54	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005AC3

Deuteranopia (green-blind)

#004FBD

Tritanopia (blue-blind)

#00637B

Achromatopsia (no color)

#545454

Design tokens & code

CSS

--color: #4243bf;
/* rgb */ color: rgb(66, 67, 191);
/* oklch */ color: oklch(46.3% 0.189 275.7);

Tailwind

colors: {
  custom: {
    50: '#8577d3',
    500: '#4243bf',
    950: '#000000',
  },
}

SCSS

$custom: #4243bf;
$custom-light: #8577d3;
$custom-dark: #000000;

JSON

{
  "hex": "#4243bf",
  "rgb": {
    "r": 66,
    "g": 67,
    "b": 191
  },
  "hsl": {
    "h": 239.52,
    "s": 49.407,
    "l": 50.392
  },
  "oklch": {
    "l": 0.46281,
    "c": 0.18897,
    "h": 275.7
  },
  "luminance": 0.08934
}

Semantic roles & 50–950 ramp

primary

#4243BF

secondary

#CACA93

accent

#D84FD9

background

#F8F7FD

surface

#F0EDFA

border

#CBC8D3

text

#0C0914

muted

#7D7B83

Preview Lab

Preview with #4243BF

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

Preview Lab → · Contrast checker → · Palette generator →