#4243D1#4243D1

#4243D1 is a mid, highly saturated blue. Relative luminance 0.098; OKLCH L 47.9% C 0.212 H 274.6°. Best body text is #FFFFFF at 7.11:1 contrast (WCAG AA passes).

Color values

HEX	#4243D1
RGB	rgb(66, 67, 209)
HSL	hsl(240, 61%, 54%)
HSV	hsv(240, 68%, 82%)
CMYK	cmyk(68.4%, 67.9%, 0%, 18%)
CIE-LAB	lab(37.43, 44.36, -73.07)
CIE-LCH	lch(37.43, 85.49, 301.26°)
OKLab	oklab(47.91% 0.017 -0.2111)
OKLCH	oklch(47.91% 0.212 274.6)
XYZ	xyz(15.7587, 9.7745, 61.3654)
Luminance	0.0978 (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

#4243D1 #D1D042

analogous

#428BD1 #4243D1 #8942D1

triadic

#4243D1 #D14243 #43D142

tetradic

#4243D1 #D1428B #D1D042 #42D189

square

#4243D1 #D1428B #D1D042 #42D189

split-complementary

#4243D1 #D18942 #8BD142

monochromatic

#1E1F7B #2A2BAC #4243D1 #7374DD #A4A5E9

Accessibility & contrast

On white

7.11

#4243D1 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.96

#4243D1 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #4243D1

7.11:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4243D1	#FFFFFF	#000000	##FFFFFF
##4243D1	1.00	7.11	2.96	7.11
#FFFFFF	7.11	1.00	21.00	1.00
#000000	2.96	21.00	1.00	21.00
##FFFFFF	7.11	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005FD5

Deuteranopia (green-blind)

#0051CE

Tritanopia (blue-blind)

#006985

Achromatopsia (no color)

#585858

Design tokens & code

CSS

--color: #4243d1;
/* rgb */ color: rgb(66, 67, 209);
/* oklch */ color: oklch(47.9% 0.212 274.6);

Tailwind

colors: {
  custom: {
    50: '#8978e0',
    500: '#4243d1',
    950: '#000000',
  },
}

SCSS

$custom: #4243d1;
$custom-light: #8978e0;
$custom-dark: #000000;

JSON

{
  "hex": "#4243d1",
  "rgb": {
    "r": 66,
    "g": 67,
    "b": 209
  },
  "hsl": {
    "h": 239.58,
    "s": 60.851,
    "l": 53.922
  },
  "oklch": {
    "l": 0.47912,
    "c": 0.21181,
    "h": 274.6
  },
  "luminance": 0.09776
}

Semantic roles & 50–950 ramp

primary

#4243D1

secondary

#D6D599

accent

#E344E4

background

#F9F7FD

surface

#F1EDFB

border

#CBC8D4

text

#0D0915

muted

#7E7B83

Preview Lab

Preview with #4243D1

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

Preview Lab → · Contrast checker → · Palette generator →