#4243D5#4243D5

#4243D5 is a mid, highly saturated blue. Relative luminance 0.100; OKLCH L 48.3% C 0.217 H 274.4°. Best body text is #FFFFFF at 7.01:1 contrast (WCAG AA passes).

Color values

HEX	#4243D5
RGB	rgb(66, 67, 213)
HSL	hsl(240, 64%, 55%)
HSV	hsv(240, 69%, 84%)
CMYK	cmyk(69%, 68.5%, 0%, 16.5%)
CIE-LAB	lab(37.80, 45.68, -74.79)
CIE-LCH	lch(37.80, 87.63, 301.42°)
OKLab	oklab(48.28% 0.0165 -0.2161)
OKLCH	oklch(48.28% 0.217 274.4)
XYZ	xyz(16.2602, 9.9751, 64.0064)
Luminance	0.0998 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue (survey)

#0343DF

ΔE00 3.39

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4243D5 #D5D442

analogous

#428CD5 #4243D5 #8B42D5

triadic

#4243D5 #D54243 #43D542

tetradic

#4243D5 #D5428C #D5D442 #42D58B

square

#4243D5 #D5428C #D5D442 #42D58B

split-complementary

#4243D5 #D58B42 #8CD542

monochromatic

#1C1D80 #2829B2 #4243D5 #7475E0 #A6A7EB

Accessibility & contrast

On white

7.01

#4243D5 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

3.00

#4243D5 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #4243D5

7.01:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4243D5	#FFFFFF	#000000	##FFFFFF
##4243D5	1.00	7.01	3.00	7.01
#FFFFFF	7.01	1.00	21.00	1.00
#000000	3.00	21.00	1.00	21.00
##FFFFFF	7.01	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0060D9

Deuteranopia (green-blind)

#0052D2

Tritanopia (blue-blind)

#006B87

Achromatopsia (no color)

#595959

Design tokens & code

CSS

--color: #4243d5;
/* rgb */ color: rgb(66, 67, 213);
/* oklch */ color: oklch(48.3% 0.217 274.4);

Tailwind

colors: {
  custom: {
    50: '#8a78e3',
    500: '#4243d5',
    950: '#000000',
  },
}

SCSS

$custom: #4243d5;
$custom-light: #8a78e3;
$custom-dark: #000000;

JSON

{
  "hex": "#4243d5",
  "rgb": {
    "r": 66,
    "g": 67,
    "b": 213
  },
  "hsl": {
    "h": 239.592,
    "s": 63.636,
    "l": 54.706
  },
  "oklch": {
    "l": 0.48284,
    "c": 0.21675,
    "h": 274.4
  },
  "luminance": 0.09977
}

Semantic roles & 50–950 ramp

primary

#4243D5

secondary

#D8D89A

accent

#E641E7

background

#F9F7FE

surface

#F2EDFC

border

#CCC8D5

text

#0D0916

muted

#7E7B84

Preview Lab

Preview with #4243D5

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

Preview Lab → · Contrast checker → · Palette generator →