#66ADDC#66ADDC

#66ADDC is a light, moderate cyan. Relative luminance 0.379; OKLCH L 71.9% C 0.099 H 239.2°. Best body text is #000000 at 8.58:1 contrast (WCAG AA passes).

Color values

HEX	#66ADDC
RGB	rgb(102, 173, 220)
HSL	hsl(204, 63%, 63%)
HSV	hsv(204, 54%, 86%)
CMYK	cmyk(53.6%, 21.4%, 0%, 13.7%)
CIE-LAB	lab(67.93, -9.15, -30.54)
CIE-LCH	lch(67.93, 31.88, 253.32°)
OKLab	oklab(71.95% -0.0508 -0.0852)
OKLCH	oklch(71.95% 0.099 239.2)
XYZ	xyz(33.3366, 37.8764, 73.2504)
Luminance	0.3788 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66ADDC #DC9566

analogous

#66DCD0 #66ADDC #6672DC

triadic

#66ADDC #DC66AD #ADDC66

tetradic

#66ADDC #D066DC #DC9566 #72DC66

square

#66ADDC #D066DC #DC9566 #72DC66

split-complementary

#66ADDC #DC6672 #DCD066

monochromatic

#2571A2 #3492D1 #66ADDC #98C8E7 #CAE2F3

Accessibility & contrast

On white

2.45

#66ADDC on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

8.58

#66ADDC on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66ADDC

8.58:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66ADDC	#FFFFFF	#000000	##000000
##66ADDC	1.00	2.45	8.58	8.58
#FFFFFF	2.45	1.00	21.00	21.00
#000000	8.58	21.00	1.00	1.00
##000000	8.58	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#98ACDE

Deuteranopia (green-blind)

#88A0DB

Tritanopia (blue-blind)

#14B9BD

Achromatopsia (no color)

#A6A6A6

Design tokens & code

CSS

--color: #66addc;
/* rgb */ color: rgb(102, 173, 220);
/* oklch */ color: oklch(71.9% 0.099 239.2);

Tailwind

colors: {
  custom: {
    50: '#99c5e7',
    500: '#66addc',
    950: '#000000',
  },
}

SCSS

$custom: #66addc;
$custom-light: #99c5e7;
$custom-dark: #000000;

JSON

{
  "hex": "#66addc",
  "rgb": {
    "r": 102,
    "g": 173,
    "b": 220
  },
  "hsl": {
    "h": 203.898,
    "s": 62.766,
    "l": 63.137
  },
  "oklch": {
    "l": 0.71947,
    "c": 0.09926,
    "h": 239.2
  },
  "luminance": 0.37879
}

Semantic roles & 50–950 ramp

primary

#66ADDC

secondary

#E4CBBA

accent

#611BCB

background

#F9FCFE

surface

#F2F8FC

border

#CCD1D5

text

#0F1216

muted

#7E8184

Preview Lab

Preview with #66ADDC

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

Preview Lab → · Contrast checker → · Palette generator →