#4240BC#4240BC

#4240BC is a mid, vivid blue. Relative luminance 0.085; OKLCH L 45.5% C 0.189 H 276.6°. Best body text is #FFFFFF at 7.80:1 contrast (WCAG AA passes).

Color values

HEX	#4240BC
RGB	rgb(66, 64, 188)
HSL	hsl(241, 49%, 49%)
HSV	hsv(241, 66%, 74%)
CMYK	cmyk(64.9%, 66%, 0%, 26.3%)
CIE-LAB	lab(34.91, 39.18, -64.97)
CIE-LCH	lch(34.91, 75.87, 301.09°)
OKLab	oklab(45.52% 0.0215 -0.1874)
OKLCH	oklch(45.52% 0.189 276.6)
XYZ	xyz(13.1543, 8.4548, 48.5059)
Luminance	0.0846 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Ocean Blue

#4F42B5

ΔE00 2.09

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4240BC #BABC40

analogous

#407CBC #4240BC #8040BC

triadic

#4240BC #BC4240 #40BC42

tetradic

#4240BC #BC407C #BABC40 #40BC80

square

#4240BC #BC407C #BABC40 #40BC80

split-complementary

#4240BC #BC8040 #7CBC40

monochromatic

#222161 #32308E #4240BC #6E6CCD #9B9ADD

Accessibility & contrast

On white

7.80

#4240BC on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.69

#4240BC on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #4240BC

7.80:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4240BC	#FFFFFF	#000000	##FFFFFF
##4240BC	1.00	7.80	2.69	7.80
#FFFFFF	7.80	1.00	21.00	1.00
#000000	2.69	21.00	1.00	21.00
##FFFFFF	7.80	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0058C0

Deuteranopia (green-blind)

#004DBA

Tritanopia (blue-blind)

#006078

Achromatopsia (no color)

#525252

Design tokens & code

CSS

--color: #4240bc;
/* rgb */ color: rgb(66, 64, 188);
/* oklch */ color: oklch(45.5% 0.189 276.6);

Tailwind

colors: {
  custom: {
    50: '#8575d1',
    500: '#4240bc',
    950: '#000000',
  },
}

SCSS

$custom: #4240bc;
$custom-light: #8575d1;
$custom-dark: #000000;

JSON

{
  "hex": "#4240bc",
  "rgb": {
    "r": 66,
    "g": 64,
    "b": 188
  },
  "hsl": {
    "h": 240.968,
    "s": 49.206,
    "l": 49.412
  },
  "oklch": {
    "l": 0.45516,
    "c": 0.18862,
    "h": 276.6
  },
  "luminance": 0.08456
}

Semantic roles & 50–950 ramp

primary

#4240BC

secondary

#C8C98F

accent

#D94FD7

background

#F8F7FD

surface

#F0EDFA

border

#CBC8D3

text

#0C0814

muted

#7D7B83

Preview Lab

Preview with #4240BC

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

Preview Lab → · Contrast checker → · Palette generator →