#4B66DB#4B66DB

#4B66DB is a mid, vivid blue. Relative luminance 0.161; OKLCH L 55.4% C 0.181 H 269.8°. Best body text is #FFFFFF at 4.97:1 contrast (WCAG AA passes).

Color values

HEX	#4B66DB
RGB	rgb(75, 102, 219)
HSL	hsl(229, 67%, 58%)
HSV	hsv(229, 66%, 86%)
CMYK	cmyk(65.8%, 53.4%, 0%, 14.1%)
CIE-LAB	lab(47.12, 27.47, -62.99)
CIE-LCH	lch(47.12, 68.72, 293.56°)
OKLab	oklab(55.45% -0.0007 -0.181)
OKLCH	oklch(55.45% 0.181 269.8)
XYZ	xyz(20.4349, 16.1112, 69.0370)
Luminance	0.1611 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4B66DB #DBC04B

analogous

#4BAEDB #4B66DB #784BDB

triadic

#4B66DB #DB4B66 #66DB4B

tetradic

#4B66DB #DB4BAE #DBC04B #4BDB78

square

#4B66DB #DB4BAE #DBC04B #4BDB78

split-complementary

#4B66DB #DB784B #AEDB4B

monochromatic

#1D328F #2744C2 #4B66DB #7E91E5 #B1BDEF

Accessibility & contrast

On white

4.97

#4B66DB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.22

#4B66DB on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #4B66DB

4.97:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4B66DB	#FFFFFF	#000000	##FFFFFF
##4B66DB	1.00	4.97	4.22	4.97
#FFFFFF	4.97	1.00	21.00	1.00
#000000	4.22	21.00	1.00	21.00
##FFFFFF	4.97	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1176DF

Deuteranopia (green-blind)

#0069D9

Tritanopia (blue-blind)

#008297

Achromatopsia (no color)

#707070

Design tokens & code

CSS

--color: #4b66db;
/* rgb */ color: rgb(75, 102, 219);
/* oklch */ color: oklch(55.4% 0.181 269.8);

Tailwind

colors: {
  custom: {
    50: '#8c91e7',
    500: '#4b66db',
    950: '#000000',
  },
}

SCSS

$custom: #4b66db;
$custom-light: #8c91e7;
$custom-dark: #000000;

JSON

{
  "hex": "#4b66db",
  "rgb": {
    "r": 75,
    "g": 102,
    "b": 219
  },
  "hsl": {
    "h": 228.75,
    "s": 66.667,
    "l": 57.647
  },
  "oklch": {
    "l": 0.55448,
    "c": 0.18102,
    "h": 269.8
  },
  "luminance": 0.16113
}

Semantic roles & 50–950 ramp

primary

#4B66DB

secondary

#DED3A4

accent

#C93EEA

background

#F9F8FE

surface

#F2F0FC

border

#CCCBD5

text

#0D0C16

muted

#7E7D84

Preview Lab

Preview with #4B66DB

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

Preview Lab → · Contrast checker → · Palette generator →