#66B2E9#66B2E9

#66B2E9 is a light, moderate cyan. Relative luminance 0.405; OKLCH L 73.6% C 0.110 H 241.8°. Best body text is #000000 at 9.11:1 contrast (WCAG AA passes).

Color values

HEX	#66B2E9
RGB	rgb(102, 178, 233)
HSL	hsl(205, 75%, 66%)
HSV	hsv(205, 56%, 91%)
CMYK	cmyk(56.2%, 23.6%, 0%, 8.6%)
CIE-LAB	lab(69.86, -7.96, -34.67)
CIE-LCH	lch(69.86, 35.57, 257.06°)
OKLab	oklab(73.64% -0.0521 -0.0971)
OKLCH	oklch(73.64% 0.11 241.8)
XYZ	xyz(36.1025, 40.5456, 82.9985)
Luminance	0.4055 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66B2E9 #E99D66

analogous

#66E9DE #66B2E9 #6670E9

triadic

#66B2E9 #E966B2 #B2E966

tetradic

#66B2E9 #DE66E9 #E99D66 #70E966

square

#66B2E9 #DE66E9 #E99D66 #70E966

split-complementary

#66B2E9 #E96670 #E9DE66

monochromatic

#1B77BA #3097E1 #66B2E9 #9CCDF1 #D1E8F8

Accessibility & contrast

On white

2.31

#66B2E9 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.11

#66B2E9 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66B2E9

9.11:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66B2E9	#FFFFFF	#000000	##000000
##66B2E9	1.00	2.31	9.11	9.11
#FFFFFF	2.31	1.00	21.00	21.00
#000000	9.11	21.00	1.00	1.00
##000000	9.11	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#9AB2EC

Deuteranopia (green-blind)

#88A5E8

Tritanopia (blue-blind)

#00C0C5

Achromatopsia (no color)

#ABABAB

Design tokens & code

CSS

--color: #66b2e9;
/* rgb */ color: rgb(102, 178, 233);
/* oklch */ color: oklch(73.6% 0.110 241.8);

Tailwind

colors: {
  custom: {
    50: '#9bc8f0',
    500: '#66b2e9',
    950: '#000000',
  },
}

SCSS

$custom: #66b2e9;
$custom-light: #9bc8f0;
$custom-dark: #000000;

JSON

{
  "hex": "#66b2e9",
  "rgb": {
    "r": 102,
    "g": 178,
    "b": 233
  },
  "hsl": {
    "h": 205.191,
    "s": 74.857,
    "l": 65.686
  },
  "oklch": {
    "l": 0.73643,
    "c": 0.11016,
    "h": 241.8
  },
  "luminance": 0.40549
}

Semantic roles & 50–950 ramp

primary

#66B2E9

secondary

#EBD2C0

accent

#630ED7

background

#FAFCFE

surface

#F3F8FD

border

#CDD1D5

text

#0F1316

muted

#7F8284

Preview Lab

Preview with #66B2E9

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

Preview Lab → · Contrast checker → · Palette generator →