#66AEE5#66AEE5

#66AEE5 is a light, moderate cyan. Relative luminance 0.388; OKLCH L 72.6% C 0.108 H 243.1°. Best body text is #000000 at 8.75:1 contrast (WCAG AA passes).

Color values

HEX	#66AEE5
RGB	rgb(102, 174, 229)
HSL	hsl(206, 71%, 65%)
HSV	hsv(206, 55%, 90%)
CMYK	cmyk(55.5%, 24%, 0%, 10.2%)
CIE-LAB	lab(68.57, -6.99, -34.48)
CIE-LCH	lch(68.57, 35.18, 258.54°)
OKLab	oklab(72.57% -0.049 -0.0965)
OKLCH	oklch(72.57% 0.108 243.1)
XYZ	xyz(34.7532, 38.7510, 79.7618)
Luminance	0.3875 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66AEE5 #E59D66

analogous

#66E5DC #66AEE5 #666FE5

triadic

#66AEE5 #E566AE #AEE566

tetradic

#66AEE5 #DC66E5 #E59D66 #6FE566

square

#66AEE5 #DC66E5 #E59D66 #6FE566

split-complementary

#66AEE5 #E5666F #E5DC66

monochromatic

#1E72B2 #3292DC #66AEE5 #9ACAEE #CFE5F7

Accessibility & contrast

On white

2.40

#66AEE5 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

8.75

#66AEE5 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66AEE5

8.75:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66AEE5	#FFFFFF	#000000	##000000
##66AEE5	1.00	2.40	8.75	8.75
#FFFFFF	2.40	1.00	21.00	21.00
#000000	8.75	21.00	1.00	1.00
##000000	8.75	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#96AEE8

Deuteranopia (green-blind)

#85A2E4

Tritanopia (blue-blind)

#00BBC1

Achromatopsia (no color)

#A7A7A7

Design tokens & code

CSS

--color: #66aee5;
/* rgb */ color: rgb(102, 174, 229);
/* oklch */ color: oklch(72.6% 0.108 243.1);

Tailwind

colors: {
  custom: {
    50: '#9ac6ed',
    500: '#66aee5',
    950: '#000000',
  },
}

SCSS

$custom: #66aee5;
$custom-light: #9ac6ed;
$custom-dark: #000000;

JSON

{
  "hex": "#66aee5",
  "rgb": {
    "r": 102,
    "g": 174,
    "b": 229
  },
  "hsl": {
    "h": 205.984,
    "s": 70.95,
    "l": 64.902
  },
  "oklch": {
    "l": 0.72573,
    "c": 0.10826,
    "h": 243.1
  },
  "luminance": 0.38754
}

Semantic roles & 50–950 ramp

primary

#66AEE5

secondary

#E9D1BE

accent

#6613D3

background

#FAFCFE

surface

#F3F8FD

border

#CDD1D5

text

#0F1316

muted

#7F8284

Preview Lab

Preview with #66AEE5

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

Preview Lab → · Contrast checker → · Palette generator →