#66B4EC#66B4EC

#66B4EC is a light, moderate cyan. Relative luminance 0.415; OKLCH L 74.2% C 0.112 H 241.6°. Best body text is #000000 at 9.30:1 contrast (WCAG AA passes).

Color values

HEX	#66B4EC
RGB	rgb(102, 180, 236)
HSL	hsl(205, 78%, 66%)
HSV	hsv(205, 57%, 93%)
CMYK	cmyk(56.8%, 23.7%, 0%, 7.5%)
CIE-LAB	lab(70.54, -8.14, -35.24)
CIE-LCH	lch(70.54, 36.17, 256.99°)
OKLab	oklab(74.22% -0.0533 -0.0987)
OKLCH	oklch(74.22% 0.112 241.6)
XYZ	xyz(36.9355, 41.5201, 85.4084)
Luminance	0.4152 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66B4EC #EC9E66

analogous

#66ECE1 #66B4EC #6671EC

triadic

#66B4EC #EC66B4 #B4EC66

tetradic

#66B4EC #E166EC #EC9E66 #71EC66

square

#66B4EC #E166EC #EC9E66 #71EC66

split-complementary

#66B4EC #EC6671 #ECE166

monochromatic

#187AC0 #3099E5 #66B4EC #9CCFF3 #D3E9FA

Accessibility & contrast

On white

2.26

#66B4EC on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.30

#66B4EC on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66B4EC

9.30:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66B4EC	#FFFFFF	#000000	##000000
##66B4EC	1.00	2.26	9.30	9.30
#FFFFFF	2.26	1.00	21.00	21.00
#000000	9.30	21.00	1.00	1.00
##000000	9.30	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#9BB4EF

Deuteranopia (green-blind)

#89A7EB

Tritanopia (blue-blind)

#00C2C7

Achromatopsia (no color)

#ADADAD

Design tokens & code

CSS

--color: #66b4ec;
/* rgb */ color: rgb(102, 180, 236);
/* oklch */ color: oklch(74.2% 0.112 241.6);

Tailwind

colors: {
  custom: {
    50: '#9bcaf2',
    500: '#66b4ec',
    950: '#000000',
  },
}

SCSS

$custom: #66b4ec;
$custom-light: #9bcaf2;
$custom-dark: #000000;

JSON

{
  "hex": "#66b4ec",
  "rgb": {
    "r": 102,
    "g": 180,
    "b": 236
  },
  "hsl": {
    "h": 205.075,
    "s": 77.907,
    "l": 66.275
  },
  "oklch": {
    "l": 0.74222,
    "c": 0.11218,
    "h": 241.6
  },
  "luminance": 0.41523
}

Semantic roles & 50–950 ramp

primary

#66B4EC

secondary

#EDD3C1

accent

#620BDA

background

#FAFCFE

surface

#F3F8FD

border

#CDD1D5

text

#0F1317

muted

#7F8285

Preview Lab

Preview with #66B4EC

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

Preview Lab → · Contrast checker → · Palette generator →