#66B4E8#66B4E8

#66B4E8 is a light, moderate cyan. Relative luminance 0.413; OKLCH L 74.0% C 0.108 H 239.6°. Best body text is #000000 at 9.26:1 contrast (WCAG AA passes).

Color values

HEX	#66B4E8
RGB	rgb(102, 180, 232)
HSL	hsl(204, 74%, 65%)
HSV	hsv(204, 56%, 91%)
CMYK	cmyk(56%, 22.4%, 0%, 9%)
CIE-LAB	lab(70.38, -9.35, -33.32)
CIE-LCH	lch(70.38, 34.60, 254.32°)
OKLab	oklab(74.04% -0.0546 -0.0932)
OKLCH	oklch(74.04% 0.108 239.6)
XYZ	xyz(36.3609, 41.2903, 82.3819)
Luminance	0.4129 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66B4E8 #E89A66

analogous

#66E8DB #66B4E8 #6673E8

triadic

#66B4E8 #E866B4 #B4E866

tetradic

#66B4E8 #DB66E8 #E89A66 #73E866

square

#66B4E8 #DB66E8 #E89A66 #73E866

split-complementary

#66B4E8 #E86673 #E8DB66

monochromatic

#1C79B8 #319AE0 #66B4E8 #9BCEF0 #D0E8F8

Accessibility & contrast

On white

2.27

#66B4E8 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.26

#66B4E8 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66B4E8

9.26:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66B4E8	#FFFFFF	#000000	##000000
##66B4E8	1.00	2.27	9.26	9.26
#FFFFFF	2.27	1.00	21.00	21.00
#000000	9.26	21.00	1.00	1.00
##000000	9.26	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#9DB4EA

Deuteranopia (green-blind)

#8BA6E7

Tritanopia (blue-blind)

#00C1C5

Achromatopsia (no color)

#ACACAC

Design tokens & code

CSS

--color: #66b4e8;
/* rgb */ color: rgb(102, 180, 232);
/* oklch */ color: oklch(74.0% 0.108 239.6);

Tailwind

colors: {
  custom: {
    50: '#9bcaef',
    500: '#66b4e8',
    950: '#000000',
  },
}

SCSS

$custom: #66b4e8;
$custom-light: #9bcaef;
$custom-dark: #000000;

JSON

{
  "hex": "#66b4e8",
  "rgb": {
    "r": 102,
    "g": 180,
    "b": 232
  },
  "hsl": {
    "h": 204,
    "s": 73.864,
    "l": 65.49
  },
  "oklch": {
    "l": 0.74043,
    "c": 0.10799,
    "h": 239.6
  },
  "luminance": 0.41293
}

Semantic roles & 50–950 ramp

primary

#66B4E8

secondary

#EBD1BF

accent

#5F10D6

background

#FAFCFE

surface

#F3F8FD

border

#CDD1D5

text

#0F1316

muted

#7F8284

Preview Lab

Preview with #66B4E8

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

Preview Lab → · Contrast checker → · Palette generator →