#4B66CB#4B66CB

#4B66CB is a mid, vivid blue. Relative luminance 0.153; OKLCH L 54.3% C 0.159 H 269.3°. Best body text is #FFFFFF at 5.17:1 contrast (WCAG AA passes).

Color values

HEX	#4B66CB
RGB	rgb(75, 102, 203)
HSL	hsl(227, 55%, 55%)
HSV	hsv(227, 63%, 80%)
CMYK	cmyk(63.1%, 49.8%, 0%, 20.4%)
CIE-LAB	lab(46.05, 21.92, -55.57)
CIE-LCH	lch(46.05, 59.74, 291.52°)
OKLab	oklab(54.3% -0.002 -0.1592)
OKLCH	oklch(54.3% 0.159 269.3)
XYZ	xyz(18.4289, 15.3088, 58.4720)
Luminance	0.1531 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4B66CB #CBB04B

analogous

#4BA6CB #4B66CB #704BCB

triadic

#4B66CB #CB4B66 #66CB4B

tetradic

#4B66CB #CB4BA6 #CBB04B #4BCB70

square

#4B66CB #CB4BA6 #CBB04B #4BCB70

split-complementary

#4B66CB #CB704B #A6CB4B

monochromatic

#233579 #314AA8 #4B66CB #7A8ED9 #AAB7E6

Accessibility & contrast

On white

5.17

#4B66CB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.06

#4B66CB on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #4B66CB

5.17:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4B66CB	#FFFFFF	#000000	##FFFFFF
##4B66CB	1.00	5.17	4.06	5.17
#FFFFFF	5.17	1.00	21.00	1.00
#000000	4.06	21.00	1.00	21.00
##FFFFFF	5.17	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2F73CF

Deuteranopia (green-blind)

#0D68C9

Tritanopia (blue-blind)

#007D8F

Achromatopsia (no color)

#6D6D6D

Design tokens & code

CSS

--color: #4b66cb;
/* rgb */ color: rgb(75, 102, 203);
/* oklch */ color: oklch(54.3% 0.159 269.3);

Tailwind

colors: {
  custom: {
    50: '#8991db',
    500: '#4b66cb',
    950: '#000000',
  },
}

SCSS

$custom: #4b66cb;
$custom-light: #8991db;
$custom-dark: #000000;

JSON

{
  "hex": "#4b66cb",
  "rgb": {
    "r": 75,
    "g": 102,
    "b": 203
  },
  "hsl": {
    "h": 227.344,
    "s": 55.172,
    "l": 54.51
  },
  "oklch": {
    "l": 0.54303,
    "c": 0.1592,
    "h": 269.3
  },
  "luminance": 0.1531
}

Semantic roles & 50–950 ramp

primary

#4B66CB

secondary

#D4C99E

accent

#BF49DF

background

#F9F8FD

surface

#F1F0FB

border

#CBCBD4

text

#0D0C15

muted

#7E7D83

Preview Lab

Preview with #4B66CB

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

Preview Lab → · Contrast checker → · Palette generator →