#4C63BB#4C63BB

#4C63BB is a mid, vivid blue. Relative luminance 0.140; OKLCH L 52.7% C 0.140 H 270.0°. Best body text is #FFFFFF at 5.51:1 contrast (WCAG AA passes).

Color values

HEX	#4C63BB
RGB	rgb(76, 99, 187)
HSL	hsl(228, 45%, 52%)
HSV	hsv(228, 59%, 73%)
CMYK	cmyk(59.4%, 47.1%, 0%, 26.7%)
CIE-LAB	lab(44.30, 18.50, -49.14)
CIE-LCH	lch(44.30, 52.51, 290.63°)
OKLab	oklab(52.66% 0 -0.1403)
OKLCH	oklch(52.66% 0.14 270)
XYZ	xyz(16.4090, 14.0467, 48.8507)
Luminance	0.1405 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4C63BB #BBA44C

analogous

#4C9ABB #4C63BB #6D4CBB

triadic

#4C63BB #BB4C63 #63BB4C

tetradic

#4C63BB #BB4C9A #BBA44C #4CBB6D

square

#4C63BB #BB4C9A #BBA44C #4CBB6D

split-complementary

#4C63BB #BB6D4C #9ABB4C

monochromatic

#273466 #384A92 #4C63BB #788ACC #A5B0DD

Accessibility & contrast

On white

5.51

#4C63BB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.81

#4C63BB on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #4C63BB

5.51:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4C63BB	#FFFFFF	#000000	##FFFFFF
##4C63BB	1.00	5.51	3.81	5.51
#FFFFFF	5.51	1.00	21.00	1.00
#000000	3.81	21.00	1.00	21.00
##FFFFFF	5.51	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#396EBE

Deuteranopia (green-blind)

#2764B9

Tritanopia (blue-blind)

#007786

Achromatopsia (no color)

#696969

Design tokens & code

CSS

--color: #4c63bb;
/* rgb */ color: rgb(76, 99, 187);
/* oklch */ color: oklch(52.7% 0.140 270.0);

Tailwind

colors: {
  custom: {
    50: '#878fd0',
    500: '#4c63bb',
    950: '#000000',
  },
}

SCSS

$custom: #4c63bb;
$custom-light: #878fd0;
$custom-dark: #000000;

JSON

{
  "hex": "#4c63bb",
  "rgb": {
    "r": 76,
    "g": 99,
    "b": 187
  },
  "hsl": {
    "h": 227.568,
    "s": 44.939,
    "l": 51.569
  },
  "oklch": {
    "l": 0.52661,
    "c": 0.1403,
    "h": 270
  },
  "luminance": 0.14048
}

Semantic roles & 50–950 ramp

primary

#4C63BB

secondary

#CAC099

accent

#BA53D5

background

#F8F8FC

surface

#F0F0F9

border

#CBCBD2

text

#0C0C14

muted

#7D7D82

Preview Lab

Preview with #4C63BB

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

Preview Lab → · Contrast checker → · Palette generator →