#66ADE5#66ADE5

#66ADE5 is a light, moderate cyan. Relative luminance 0.384; OKLCH L 72.4% C 0.109 H 243.9°. Best body text is #000000 at 8.67:1 contrast (WCAG AA passes).

Color values

HEX	#66ADE5
RGB	rgb(102, 173, 229)
HSL	hsl(206, 71%, 65%)
HSV	hsv(206, 55%, 90%)
CMYK	cmyk(55.5%, 24.5%, 0%, 10.2%)
CIE-LAB	lab(68.29, -6.44, -34.92)
CIE-LCH	lch(68.29, 35.51, 259.55°)
OKLab	oklab(72.35% -0.0479 -0.0978)
OKLCH	oklch(72.35% 0.109 243.9)
XYZ	xyz(34.5608, 38.3661, 79.6977)
Luminance	0.3837 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66ADE5 #E59E66

analogous

#66E5DE #66ADE5 #666DE5

triadic

#66ADE5 #E566AD #ADE566

tetradic

#66ADE5 #DE66E5 #E59E66 #6DE566

square

#66ADE5 #DE66E5 #E59E66 #6DE566

split-complementary

#66ADE5 #E5666D #E5DE66

monochromatic

#1E71B2 #3291DC #66ADE5 #9AC9EE #CFE5F7

Accessibility & contrast

On white

2.42

#66ADE5 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

8.67

#66ADE5 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66ADE5

8.67:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66ADE5	#FFFFFF	#000000	##000000
##66ADE5	1.00	2.42	8.67	8.67
#FFFFFF	2.42	1.00	21.00	21.00
#000000	8.67	21.00	1.00	1.00
##000000	8.67	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#95AEE8

Deuteranopia (green-blind)

#84A1E4

Tritanopia (blue-blind)

#00BBC0

Achromatopsia (no color)

#A6A6A6

Design tokens & code

CSS

--color: #66ade5;
/* rgb */ color: rgb(102, 173, 229);
/* oklch */ color: oklch(72.4% 0.109 243.9);

Tailwind

colors: {
  custom: {
    50: '#9ac5ed',
    500: '#66ade5',
    950: '#000000',
  },
}

SCSS

$custom: #66ade5;
$custom-light: #9ac5ed;
$custom-dark: #000000;

JSON

{
  "hex": "#66ade5",
  "rgb": {
    "r": 102,
    "g": 173,
    "b": 229
  },
  "hsl": {
    "h": 206.457,
    "s": 70.95,
    "l": 64.902
  },
  "oklch": {
    "l": 0.72351,
    "c": 0.1089,
    "h": 243.9
  },
  "luminance": 0.38369
}

Semantic roles & 50–950 ramp

primary

#66ADE5

secondary

#E9D1BE

accent

#6713D3

background

#FAFCFE

surface

#F3F8FD

border

#CDD1D5

text

#0F1216

muted

#7F8184

Preview Lab

Preview with #66ADE5

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

Preview Lab → · Contrast checker → · Palette generator →