#4B66BB#4B66BB

#4B66BB is a mid, vivid blue. Relative luminance 0.146; OKLCH L 53.2% C 0.137 H 268.2°. Best body text is #FFFFFF at 5.36:1 contrast (WCAG AA passes).

Color values

HEX	#4B66BB
RGB	rgb(75, 102, 187)
HSL	hsl(226, 45%, 51%)
HSV	hsv(226, 60%, 73%)
CMYK	cmyk(59.9%, 45.5%, 0%, 26.7%)
CIE-LAB	lab(45.06, 16.40, -47.93)
CIE-LCH	lch(45.06, 50.66, 288.89°)
OKLab	oklab(53.23% -0.0042 -0.1367)
OKLCH	oklch(53.23% 0.137 268.2)
XYZ	xyz(16.6196, 14.5851, 48.9435)
Luminance	0.1459 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4B66BB #BBA04B

analogous

#4B9EBB #4B66BB #684BBB

triadic

#4B66BB #BB4B66 #66BB4B

tetradic

#4B66BB #BB4B9E #BBA04B #4BBB68

square

#4B66BB #BB4B9E #BBA04B #4BBB68

split-complementary

#4B66BB #BB684B #9EBB4B

monochromatic

#263565 #374D92 #4B66BB #778CCC #A4B2DD

Accessibility & contrast

On white

5.36

#4B66BB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.92

#4B66BB on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #4B66BB

5.36:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4B66BB	#FFFFFF	#000000	##FFFFFF
##4B66BB	1.00	5.36	3.92	5.36
#FFFFFF	5.36	1.00	21.00	1.00
#000000	3.92	21.00	1.00	21.00
##FFFFFF	5.36	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3E70BE

Deuteranopia (green-blind)

#2E66B9

Tritanopia (blue-blind)

#007987

Achromatopsia (no color)

#6B6B6B

Design tokens & code

CSS

--color: #4b66bb;
/* rgb */ color: rgb(75, 102, 187);
/* oklch */ color: oklch(53.2% 0.137 268.2);

Tailwind

colors: {
  custom: {
    50: '#8791d0',
    500: '#4b66bb',
    950: '#000000',
  },
}

SCSS

$custom: #4b66bb;
$custom-light: #8791d0;
$custom-dark: #000000;

JSON

{
  "hex": "#4b66bb",
  "rgb": {
    "r": 75,
    "g": 102,
    "b": 187
  },
  "hsl": {
    "h": 225.536,
    "s": 45.161,
    "l": 51.373
  },
  "oklch": {
    "l": 0.53226,
    "c": 0.13677,
    "h": 268.2
  },
  "luminance": 0.14586
}

Semantic roles & 50–950 ramp

primary

#4B66BB

secondary

#CABE98

accent

#B653D5

background

#F8F8FC

surface

#F0F0F9

border

#CBCBD2

text

#0C0C14

muted

#7D7D82

Preview Lab

Preview with #4B66BB

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

Preview Lab → · Contrast checker → · Palette generator →