#66B4EE#66B4EE

#66B4EE is a light, moderate cyan. Relative luminance 0.416; OKLCH L 74.3% C 0.114 H 242.6°. Best body text is #000000 at 9.33:1 contrast (WCAG AA passes).

Color values

HEX	#66B4EE
RGB	rgb(102, 180, 238)
HSL	hsl(206, 80%, 67%)
HSV	hsv(206, 57%, 93%)
CMYK	cmyk(57.1%, 24.4%, 0%, 6.7%)
CIE-LAB	lab(70.62, -7.53, -36.21)
CIE-LCH	lch(70.62, 36.98, 258.25°)
OKLab	oklab(74.31% -0.0526 -0.1015)
OKLCH	oklch(74.31% 0.114 242.6)
XYZ	xyz(37.2277, 41.6370, 86.9472)
Luminance	0.4164 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66B4EE #EEA066

analogous

#66EEE4 #66B4EE #6670EE

triadic

#66B4EE #EE66B4 #B4EE66

tetradic

#66B4EE #E466EE #EEA066 #70EE66

square

#66B4EE #E466EE #EEA066 #70EE66

split-complementary

#66B4EE #EE6670 #EEE466

monochromatic

#167AC4 #2F99E8 #66B4EE #9DCFF4 #D4EAFA

Accessibility & contrast

On white

2.25

#66B4EE on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.33

#66B4EE on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66B4EE

9.33:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66B4EE	#FFFFFF	#000000	##000000
##66B4EE	1.00	2.25	9.33	9.33
#FFFFFF	2.25	1.00	21.00	21.00
#000000	9.33	21.00	1.00	1.00
##000000	9.33	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#9BB4F1

Deuteranopia (green-blind)

#88A7ED

Tritanopia (blue-blind)

#00C2C8

Achromatopsia (no color)

#ADADAD

Design tokens & code

CSS

--color: #66b4ee;
/* rgb */ color: rgb(102, 180, 238);
/* oklch */ color: oklch(74.3% 0.114 242.6);

Tailwind

colors: {
  custom: {
    50: '#9bcaf3',
    500: '#66b4ee',
    950: '#000000',
  },
}

SCSS

$custom: #66b4ee;
$custom-light: #9bcaf3;
$custom-dark: #000000;

JSON

{
  "hex": "#66b4ee",
  "rgb": {
    "r": 102,
    "g": 180,
    "b": 238
  },
  "hsl": {
    "h": 205.588,
    "s": 80,
    "l": 66.667
  },
  "oklch": {
    "l": 0.74313,
    "c": 0.11432,
    "h": 242.6
  },
  "luminance": 0.4164
}

Semantic roles & 50–950 ramp

primary

#66B4EE

secondary

#EED5C2

accent

#6309DC

background

#FAFCFE

surface

#F4F8FD

border

#CED1D5

text

#0F1317

muted

#7F8285

Preview Lab

Preview with #66B4EE

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

Preview Lab → · Contrast checker → · Palette generator →