#66B4EA#66B4EA

#66B4EA is a light, moderate cyan. Relative luminance 0.414; OKLCH L 74.1% C 0.110 H 240.7°. Best body text is #000000 at 9.28:1 contrast (WCAG AA passes).

Color values

HEX	#66B4EA
RGB	rgb(102, 180, 234)
HSL	hsl(205, 76%, 66%)
HSV	hsv(205, 56%, 92%)
CMYK	cmyk(56.4%, 23.1%, 0%, 8.2%)
CIE-LAB	lab(70.46, -8.75, -34.28)
CIE-LCH	lch(70.46, 35.38, 255.68°)
OKLab	oklab(74.13% -0.0539 -0.0959)
OKLCH	oklch(74.13% 0.11 240.7)
XYZ	xyz(36.6465, 41.4045, 83.8866)
Luminance	0.4141 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66B4EA #EA9C66

analogous

#66EADE #66B4EA #6672EA

triadic

#66B4EA #EA66B4 #B4EA66

tetradic

#66B4EA #DE66EA #EA9C66 #72EA66

square

#66B4EA #DE66EA #EA9C66 #72EA66

split-complementary

#66B4EA #EA6672 #EADE66

monochromatic

#1A7ABC #309AE3 #66B4EA #9CCEF1 #D2E9F9

Accessibility & contrast

On white

2.26

#66B4EA on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.28

#66B4EA on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66B4EA

9.28:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66B4EA	#FFFFFF	#000000	##000000
##66B4EA	1.00	2.26	9.28	9.28
#FFFFFF	2.26	1.00	21.00	21.00
#000000	9.28	21.00	1.00	1.00
##000000	9.28	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#9CB4ED

Deuteranopia (green-blind)

#8AA6E9

Tritanopia (blue-blind)

#00C1C6

Achromatopsia (no color)

#ACACAC

Design tokens & code

CSS

--color: #66b4ea;
/* rgb */ color: rgb(102, 180, 234);
/* oklch */ color: oklch(74.1% 0.110 240.7);

Tailwind

colors: {
  custom: {
    50: '#9bcaf1',
    500: '#66b4ea',
    950: '#000000',
  },
}

SCSS

$custom: #66b4ea;
$custom-light: #9bcaf1;
$custom-dark: #000000;

JSON

{
  "hex": "#66b4ea",
  "rgb": {
    "r": 102,
    "g": 180,
    "b": 234
  },
  "hsl": {
    "h": 204.545,
    "s": 75.862,
    "l": 65.882
  },
  "oklch": {
    "l": 0.74132,
    "c": 0.11007,
    "h": 240.7
  },
  "luminance": 0.41408
}

Semantic roles & 50–950 ramp

primary

#66B4EA

secondary

#ECD2C0

accent

#600DD8

background

#FAFCFE

surface

#F3F8FD

border

#CDD1D5

text

#0F1316

muted

#7F8284

Preview Lab

Preview with #66B4EA

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

Preview Lab → · Contrast checker → · Palette generator →