#4399DB#4399DB

#4399DB is a light, vivid cyan. Relative luminance 0.291; OKLCH L 66.0% C 0.128 H 244.8°. Best body text is #000000 at 6.82:1 contrast (WCAG AA passes).

Color values

HEX	#4399DB
RGB	rgb(67, 153, 219)
HSL	hsl(206, 68%, 56%)
HSV	hsv(206, 69%, 86%)
CMYK	cmyk(69.4%, 30.1%, 0%, 14.1%)
CIE-LAB	lab(60.86, -4.70, -41.10)
CIE-LCH	lch(60.86, 41.37, 263.48°)
OKLab	oklab(65.98% -0.0546 -0.1162)
OKLCH	oklch(65.98% 0.128 244.8)
XYZ	xyz(26.4873, 29.0873, 71.2226)
Luminance	0.2909 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4399DB #DB8543

analogous

#43DBD1 #4399DB #434DDB

triadic

#4399DB #DB4399 #99DB43

tetradic

#4399DB #D143DB #DB8543 #4DDB43

square

#4399DB #D143DB #DB8543 #4DDB43

split-complementary

#4399DB #DB434D #DBD143

monochromatic

#1A5989 #247ABD #4399DB #76B5E5 #AAD1EF

Accessibility & contrast

On white

3.08

#4399DB on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

6.82

#4399DB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #4399DB

6.82:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4399DB	#FFFFFF	#000000	##000000
##4399DB	1.00	3.08	6.82	6.82
#FFFFFF	3.08	1.00	21.00	21.00
#000000	6.82	21.00	1.00	1.00
##000000	6.82	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#7B9BDE

Deuteranopia (green-blind)

#668CDA

Tritanopia (blue-blind)

#00A9B0

Achromatopsia (no color)

#939393

Design tokens & code

CSS

--color: #4399db;
/* rgb */ color: rgb(67, 153, 219);
/* oklch */ color: oklch(66.0% 0.128 244.8);

Tailwind

colors: {
  custom: {
    50: '#88b6e6',
    500: '#4399db',
    950: '#000000',
  },
}

SCSS

$custom: #4399db;
$custom-light: #88b6e6;
$custom-dark: #000000;

JSON

{
  "hex": "#4399db",
  "rgb": {
    "r": 67,
    "g": 153,
    "b": 219
  },
  "hsl": {
    "h": 206.053,
    "s": 67.857,
    "l": 56.078
  },
  "oklch": {
    "l": 0.6598,
    "c": 0.12843,
    "h": 244.8
  },
  "luminance": 0.2909
}

Semantic roles & 50–950 ramp

primary

#4399DB

secondary

#DCB99E

accent

#883DEB

background

#F9FBFE

surface

#F1F6FC

border

#CBD0D5

text

#0D1116

muted

#7E8084

Preview Lab

Preview with #4399DB

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

Preview Lab → · Contrast checker → · Palette generator →