#66ADD5#66ADD5

#66ADD5 is a light, moderate cyan. Relative luminance 0.375; OKLCH L 71.6% C 0.092 H 234.8°. Best body text is #000000 at 8.50:1 contrast (WCAG AA passes).

Color values

HEX	#66ADD5
RGB	rgb(102, 173, 213)
HSL	hsl(202, 57%, 62%)
HSV	hsv(202, 52%, 84%)
CMYK	cmyk(52.1%, 18.8%, 0%, 16.5%)
CIE-LAB	lab(67.66, -11.22, -27.10)
CIE-LCH	lch(67.66, 29.34, 247.51°)
OKLab	oklab(71.65% -0.0533 -0.0754)
OKLCH	oklch(71.65% 0.092 234.8)
XYZ	xyz(32.4289, 37.5133, 68.4698)
Luminance	0.3752 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66ADD5 #D58E66

analogous

#66D5C6 #66ADD5 #6676D5

triadic

#66ADD5 #D566AD #ADD566

tetradic

#66ADD5 #C666D5 #D58E66 #76D566

square

#66ADD5 #C666D5 #D58E66 #76D566

split-complementary

#66ADD5 #D56676 #D5C666

monochromatic

#297097 #3793C7 #66ADD5 #96C7E2 #C6E0EF

Accessibility & contrast

On white

2.47

#66ADD5 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

8.50

#66ADD5 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66ADD5

8.50:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66ADD5	#FFFFFF	#000000	##000000
##66ADD5	1.00	2.47	8.50	8.50
#FFFFFF	2.47	1.00	21.00	21.00
#000000	8.50	21.00	1.00	1.00
##000000	8.50	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#9AABD7

Deuteranopia (green-blind)

#8BA0D4

Tritanopia (blue-blind)

#22B8BA

Achromatopsia (no color)

#A5A5A5

Design tokens & code

CSS

--color: #66add5;
/* rgb */ color: rgb(102, 173, 213);
/* oklch */ color: oklch(71.6% 0.092 234.8);

Tailwind

colors: {
  custom: {
    50: '#99c5e2',
    500: '#66add5',
    950: '#000000',
  },
}

SCSS

$custom: #66add5;
$custom-light: #99c5e2;
$custom-dark: #000000;

JSON

{
  "hex": "#66add5",
  "rgb": {
    "r": 102,
    "g": 173,
    "b": 213
  },
  "hsl": {
    "h": 201.622,
    "s": 56.923,
    "l": 61.765
  },
  "oklch": {
    "l": 0.71645,
    "c": 0.09235,
    "h": 234.8
  },
  "luminance": 0.37516
}

Semantic roles & 50–950 ramp

primary

#66ADD5

secondary

#E0C6B7

accent

#5C21C4

background

#F9FCFD

surface

#F2F8FB

border

#CCD1D4

text

#0E1215

muted

#7E8183

Preview Lab

Preview with #66ADD5

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

Preview Lab → · Contrast checker → · Palette generator →