#66B8ED#66B8ED

#66B8ED is a light, moderate cyan. Relative luminance 0.432; OKLCH L 75.2% C 0.111 H 238.9°. Best body text is #000000 at 9.64:1 contrast (WCAG AA passes).

Color values

HEX	#66B8ED
RGB	rgb(102, 184, 237)
HSL	hsl(204, 79%, 66%)
HSV	hsv(204, 57%, 93%)
CMYK	cmyk(57%, 22.4%, 0%, 7.1%)
CIE-LAB	lab(71.70, -10.00, -33.99)
CIE-LCH	lch(71.70, 35.43, 253.60°)
OKLab	oklab(75.16% -0.0573 -0.0951)
OKLCH	oklch(75.16% 0.111 238.9)
XYZ	xyz(37.9004, 43.2167, 86.4487)
Luminance	0.4322 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66B8ED #ED9B66

analogous

#66EDDF #66B8ED #6675ED

triadic

#66B8ED #ED66B8 #B8ED66

tetradic

#66B8ED #DF66ED #ED9B66 #75ED66

square

#66B8ED #DF66ED #ED9B66 #75ED66

split-complementary

#66B8ED #ED6675 #EDDF66

monochromatic

#177FC2 #2F9FE7 #66B8ED #9DD1F3 #D4EBFA

Accessibility & contrast

On white

2.18

#66B8ED on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.64

#66B8ED on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66B8ED

9.64:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66B8ED	#FFFFFF	#000000	##000000
##66B8ED	1.00	2.18	9.64	9.64
#FFFFFF	2.18	1.00	21.00	21.00
#000000	9.64	21.00	1.00	1.00
##000000	9.64	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#A0B7F0

Deuteranopia (green-blind)

#8DAAEC

Tritanopia (blue-blind)

#00C5CA

Achromatopsia (no color)

#B0B0B0

Design tokens & code

CSS

--color: #66b8ed;
/* rgb */ color: rgb(102, 184, 237);
/* oklch */ color: oklch(75.2% 0.111 238.9);

Tailwind

colors: {
  custom: {
    50: '#9bcdf3',
    500: '#66b8ed',
    950: '#000000',
  },
}

SCSS

$custom: #66b8ed;
$custom-light: #9bcdf3;
$custom-dark: #000000;

JSON

{
  "hex": "#66b8ed",
  "rgb": {
    "r": 102,
    "g": 184,
    "b": 237
  },
  "hsl": {
    "h": 203.556,
    "s": 78.947,
    "l": 66.471
  },
  "oklch": {
    "l": 0.75156,
    "c": 0.111,
    "h": 238.9
  },
  "luminance": 0.4322
}

Semantic roles & 50–950 ramp

primary

#66B8ED

secondary

#EDD3C2

accent

#5C0ADB

background

#FAFCFE

surface

#F4F9FD

border

#CED2D5

text

#0F1317

muted

#7F8285

Preview Lab

Preview with #66B8ED

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

Preview Lab → · Contrast checker → · Palette generator →