#4B63BB#4B63BB

#4B63BB is a mid, vivid blue. Relative luminance 0.140; OKLCH L 52.6% C 0.141 H 269.6°. Best body text is #FFFFFF at 5.52:1 contrast (WCAG AA passes).

Color values

HEX	#4B63BB
RGB	rgb(75, 99, 187)
HSL	hsl(227, 45%, 51%)
HSV	hsv(227, 60%, 73%)
CMYK	cmyk(59.9%, 47.1%, 0%, 26.7%)
CIE-LAB	lab(44.24, 18.30, -49.24)
CIE-LCH	lch(44.24, 52.53, 290.39°)
OKLab	oklab(52.6% -0.001 -0.1406)
OKLCH	oklch(52.6% 0.141 269.6)
XYZ	xyz(16.3301, 14.0061, 48.8470)
Luminance	0.1401 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4B63BB #BBA34B

analogous

#4B9BBB #4B63BB #6B4BBB

triadic

#4B63BB #BB4B63 #63BB4B

tetradic

#4B63BB #BB4B9B #BBA34B #4BBB6B

square

#4B63BB #BB4B9B #BBA34B #4BBB6B

split-complementary

#4B63BB #BB6B4B #9BBB4B

monochromatic

#263465 #374A92 #4B63BB #7789CC #A4B0DD

Accessibility & contrast

On white

5.52

#4B63BB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.80

#4B63BB on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #4B63BB

5.52:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4B63BB	#FFFFFF	#000000	##FFFFFF
##4B63BB	1.00	5.52	3.80	5.52
#FFFFFF	5.52	1.00	21.00	1.00
#000000	3.80	21.00	1.00	21.00
##FFFFFF	5.52	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: #4b63bb;
/* rgb */ color: rgb(75, 99, 187);
/* oklch */ color: oklch(52.6% 0.141 269.6);

Tailwind

colors: {
  custom: {
    50: '#878fd0',
    500: '#4b63bb',
    950: '#000000',
  },
}

SCSS

$custom: #4b63bb;
$custom-light: #878fd0;
$custom-dark: #000000;

JSON

{
  "hex": "#4b63bb",
  "rgb": {
    "r": 75,
    "g": 99,
    "b": 187
  },
  "hsl": {
    "h": 227.143,
    "s": 45.161,
    "l": 51.373
  },
  "oklch": {
    "l": 0.52601,
    "c": 0.1406,
    "h": 269.6
  },
  "luminance": 0.14007
}

Semantic roles & 50–950 ramp

primary

#4B63BB

secondary

#CABF98

accent

#B953D5

background

#F8F8FC

surface

#F0F0F9

border

#CBCBD2

text

#0C0C14

muted

#7D7D82

Preview Lab

Preview with #4B63BB

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

Preview Lab → · Contrast checker → · Palette generator →