#4240BF#4240BF

#4240BF is a mid, vivid blue. Relative luminance 0.086; OKLCH L 45.8% C 0.192 H 276.3°. Best body text is #FFFFFF at 7.73:1 contrast (WCAG AA passes).

Color values

HEX	#4240BF
RGB	rgb(66, 64, 191)
HSL	hsl(241, 50%, 50%)
HSV	hsv(241, 66%, 75%)
CMYK	cmyk(65.4%, 66.5%, 0%, 25.1%)
CIE-LAB	lab(35.17, 40.18, -66.30)
CIE-LCH	lch(35.17, 77.53, 301.22°)
OKLab	oklab(45.79% 0.0212 -0.1913)
OKLCH	oklch(45.79% 0.192 276.3)
XYZ	xyz(13.4811, 8.5855, 50.2268)
Luminance	0.0859 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Ocean Blue

#4F42B5

ΔE00 2.27

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4240BF #BDBF40

analogous

#407DBF #4240BF #8240BF

triadic

#4240BF #BF4240 #40BF42

tetradic

#4240BF #BF407D #BDBF40 #40BF82

square

#4240BF #BF407D #BDBF40 #40BF82

split-complementary

#4240BF #BF8240 #7DBF40

monochromatic

#222163 #323191 #4240BF #6F6ECE #9D9CDE

Accessibility & contrast

On white

7.73

#4240BF on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.72

#4240BF on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #4240BF

7.73:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4240BF	#FFFFFF	#000000	##FFFFFF
##4240BF	1.00	7.73	2.72	7.73
#FFFFFF	7.73	1.00	21.00	1.00
#000000	2.72	21.00	1.00	21.00
##FFFFFF	7.73	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0058C3

Deuteranopia (green-blind)

#004DBD

Tritanopia (blue-blind)

#00617A

Achromatopsia (no color)

#535353

Design tokens & code

CSS

--color: #4240bf;
/* rgb */ color: rgb(66, 64, 191);
/* oklch */ color: oklch(45.8% 0.192 276.3);

Tailwind

colors: {
  custom: {
    50: '#8575d3',
    500: '#4240bf',
    950: '#000000',
  },
}

SCSS

$custom: #4240bf;
$custom-light: #8575d3;
$custom-dark: #000000;

JSON

{
  "hex": "#4240bf",
  "rgb": {
    "r": 66,
    "g": 64,
    "b": 191
  },
  "hsl": {
    "h": 240.945,
    "s": 49.804,
    "l": 50
  },
  "oklch": {
    "l": 0.45786,
    "c": 0.19247,
    "h": 276.3
  },
  "luminance": 0.08587
}

Semantic roles & 50–950 ramp

primary

#4240BF

secondary

#C9CA91

accent

#D94ED7

background

#F8F7FD

surface

#F0EDFA

border

#CBC8D3

text

#0C0814

muted

#7D7B83

Preview Lab

Preview with #4240BF

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

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