#66B4E6#66B4E6

#66B4E6 is a light, moderate cyan. Relative luminance 0.412; OKLCH L 74.0% C 0.106 H 238.6°. Best body text is #000000 at 9.24:1 contrast (WCAG AA passes).

Color values

HEX	#66B4E6
RGB	rgb(102, 180, 230)
HSL	hsl(203, 72%, 65%)
HSV	hsv(203, 56%, 90%)
CMYK	cmyk(55.7%, 21.7%, 0%, 9.8%)
CIE-LAB	lab(70.30, -9.96, -32.35)
CIE-LCH	lch(70.30, 33.85, 252.89°)
OKLab	oklab(73.95% -0.0552 -0.0904)
OKLCH	oklch(73.95% 0.106 238.6)
XYZ	xyz(36.0784, 41.1773, 80.8943)
Luminance	0.4118 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66B4E6 #E69866

analogous

#66E6D8 #66B4E6 #6674E6

triadic

#66B4E6 #E666B4 #B4E666

tetradic

#66B4E6 #D866E6 #E69866 #74E666

square

#66B4E6 #D866E6 #E69866 #74E666

split-complementary

#66B4E6 #E66674 #E6D866

monochromatic

#1D79B4 #319ADD #66B4E6 #9BCEEF #CFE8F7

Accessibility & contrast

On white

2.27

#66B4E6 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.24

#66B4E6 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66B4E6

9.24:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66B4E6	#FFFFFF	#000000	##000000
##66B4E6	1.00	2.27	9.24	9.24
#FFFFFF	2.27	1.00	21.00	21.00
#000000	9.24	21.00	1.00	1.00
##000000	9.24	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#9DB3E8

Deuteranopia (green-blind)

#8CA6E5

Tritanopia (blue-blind)

#00C1C5

Achromatopsia (no color)

#ACACAC

Design tokens & code

CSS

--color: #66b4e6;
/* rgb */ color: rgb(102, 180, 230);
/* oklch */ color: oklch(74.0% 0.106 238.6);

Tailwind

colors: {
  custom: {
    50: '#9bcaee',
    500: '#66b4e6',
    950: '#000000',
  },
}

SCSS

$custom: #66b4e6;
$custom-light: #9bcaee;
$custom-dark: #000000;

JSON

{
  "hex": "#66b4e6",
  "rgb": {
    "r": 102,
    "g": 180,
    "b": 230
  },
  "hsl": {
    "h": 203.438,
    "s": 71.91,
    "l": 65.098
  },
  "oklch": {
    "l": 0.73954,
    "c": 0.10595,
    "h": 238.6
  },
  "luminance": 0.4118
}

Semantic roles & 50–950 ramp

primary

#66B4E6

secondary

#EACFBE

accent

#5D12D4

background

#FAFCFE

surface

#F3F8FD

border

#CDD1D5

text

#0F1316

muted

#7F8284

Preview Lab

Preview with #66B4E6

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

Preview Lab → · Contrast checker → · Palette generator →