#4C51BB#4C51BB

#4C51BB is a mid, vivid blue. Relative luminance 0.110; OKLCH L 49.1% C 0.164 H 276.5°. Best body text is #FFFFFF at 6.56:1 contrast (WCAG AA passes).

Color values

HEX	#4C51BB
RGB	rgb(76, 81, 187)
HSL	hsl(237, 45%, 52%)
HSV	hsv(237, 59%, 73%)
CMYK	cmyk(59.4%, 56.7%, 0%, 26.7%)
CIE-LAB	lab(39.59, 29.91, -56.73)
CIE-LCH	lch(39.59, 64.13, 297.80°)
OKLab	oklab(49.11% 0.0185 -0.1628)
OKLCH	oklch(49.11% 0.164 276.5)
XYZ	xyz(14.8897, 11.0081, 48.3442)
Luminance	0.1101 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4C51BB #BBB64C

analogous

#4C89BB #4C51BB #7F4CBB

triadic

#4C51BB #BB4C51 #51BB4C

tetradic

#4C51BB #BB4C89 #BBB64C #4CBB7F

square

#4C51BB #BB4C89 #BBB64C #4CBB7F

split-complementary

#4C51BB #BB7F4C #89BB4C

monochromatic

#272A66 #383C92 #4C51BB #787CCC #A5A7DD

Accessibility & contrast

On white

6.56

#4C51BB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.20

#4C51BB on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #4C51BB

6.56:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4C51BB	#FFFFFF	#000000	##FFFFFF
##4C51BB	1.00	6.56	3.20	6.56
#FFFFFF	6.56	1.00	21.00	1.00
#000000	3.20	21.00	1.00	21.00
##FFFFFF	6.56	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0062BF

Deuteranopia (green-blind)

#0059B9

Tritanopia (blue-blind)

#006A7E

Achromatopsia (no color)

#5D5D5D

Design tokens & code

CSS

--color: #4c51bb;
/* rgb */ color: rgb(76, 81, 187);
/* oklch */ color: oklch(49.1% 0.164 276.5);

Tailwind

colors: {
  custom: {
    50: '#8882d0',
    500: '#4c51bb',
    950: '#000000',
  },
}

SCSS

$custom: #4c51bb;
$custom-light: #8882d0;
$custom-dark: #000000;

JSON

{
  "hex": "#4c51bb",
  "rgb": {
    "r": 76,
    "g": 81,
    "b": 187
  },
  "hsl": {
    "h": 237.297,
    "s": 44.939,
    "l": 51.569
  },
  "oklch": {
    "l": 0.49115,
    "c": 0.16384,
    "h": 276.5
  },
  "luminance": 0.11009
}

Semantic roles & 50–950 ramp

primary

#4C51BB

secondary

#CAC899

accent

#CF53D5

background

#F8F7FC

surface

#F0EEF9

border

#CBC9D2

text

#0C0A14

muted

#7D7C82

Preview Lab

Preview with #4C51BB

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

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