#66B0EE#66B0EE

#66B0EE is a light, moderate cyan. Relative luminance 0.400; OKLCH L 73.4% C 0.117 H 245.6°. Best body text is #000000 at 9.01:1 contrast (WCAG AA passes).

Color values

HEX	#66B0EE
RGB	rgb(102, 176, 238)
HSL	hsl(207, 80%, 67%)
HSV	hsv(207, 57%, 93%)
CMYK	cmyk(57.1%, 26.1%, 0%, 6.7%)
CIE-LAB	lab(69.50, -5.34, -37.94)
CIE-LCH	lch(69.50, 38.32, 261.99°)
OKLab	oklab(73.43% -0.0483 -0.1065)
OKLCH	oklch(73.43% 0.117 245.6)
XYZ	xyz(36.4318, 40.0453, 86.6819)
Luminance	0.4005 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66B0EE #EEA466

analogous

#66EEE8 #66B0EE #666CEE

triadic

#66B0EE #EE66B0 #B0EE66

tetradic

#66B0EE #E866EE #EEA466 #6CEE66

square

#66B0EE #E866EE #EEA466 #6CEE66

split-complementary

#66B0EE #EE666C #EEE866

monochromatic

#1674C4 #2F94E8 #66B0EE #9DCCF4 #D4E9FA

Accessibility & contrast

On white

2.33

#66B0EE on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.01

#66B0EE on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66B0EE

9.01:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66B0EE	#FFFFFF	#000000	##000000
##66B0EE	1.00	2.33	9.01	9.01
#FFFFFF	2.33	1.00	21.00	21.00
#000000	9.01	21.00	1.00	1.00
##000000	9.01	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#95B1F1

Deuteranopia (green-blind)

#83A4ED

Tritanopia (blue-blind)

#00BFC5

Achromatopsia (no color)

#AAAAAA

Design tokens & code

CSS

--color: #66b0ee;
/* rgb */ color: rgb(102, 176, 238);
/* oklch */ color: oklch(73.4% 0.117 245.6);

Tailwind

colors: {
  custom: {
    50: '#9bc7f3',
    500: '#66b0ee',
    950: '#000000',
  },
}

SCSS

$custom: #66b0ee;
$custom-light: #9bc7f3;
$custom-dark: #000000;

JSON

{
  "hex": "#66b0ee",
  "rgb": {
    "r": 102,
    "g": 176,
    "b": 238
  },
  "hsl": {
    "h": 207.353,
    "s": 80,
    "l": 66.667
  },
  "oklch": {
    "l": 0.7343,
    "c": 0.11697,
    "h": 245.6
  },
  "luminance": 0.40048
}

Semantic roles & 50–950 ramp

primary

#66B0EE

secondary

#EED6C2

accent

#6909DC

background

#FAFCFE

surface

#F4F8FD

border

#CED1D5

text

#0F1317

muted

#7F8285

Preview Lab

Preview with #66B0EE

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

Preview Lab → · Contrast checker → · Palette generator →