#66B3EF#66B3EF

#66B3EF is a light, moderate cyan. Relative luminance 0.413; OKLCH L 74.1% C 0.116 H 243.8°. Best body text is #000000 at 9.26:1 contrast (WCAG AA passes).

Color values

HEX	#66B3EF
RGB	rgb(102, 179, 239)
HSL	hsl(206, 81%, 67%)
HSV	hsv(206, 57%, 94%)
CMYK	cmyk(57.3%, 25.1%, 0%, 6.3%)
CIE-LAB	lab(70.38, -6.68, -37.12)
CIE-LCH	lch(70.38, 37.72, 259.80°)
OKLab	oklab(74.14% -0.0512 -0.1041)
OKLCH	oklch(74.14% 0.116 243.8)
XYZ	xyz(37.1739, 41.2936, 87.6561)
Luminance	0.4130 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66B3EF #EFA266

analogous

#66EFE6 #66B3EF #666FEF

triadic

#66B3EF #EF66B3 #B3EF66

tetradic

#66B3EF #E666EF #EFA266 #6FEF66

square

#66B3EF #E666EF #EFA266 #6FEF66

split-complementary

#66B3EF #EF666F #EFE666

monochromatic

#1578C6 #2F97E9 #66B3EF #9DCFF5 #D5EAFB

Accessibility & contrast

On white

2.27

#66B3EF on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.26

#66B3EF on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66B3EF

9.26:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66B3EF	#FFFFFF	#000000	##000000
##66B3EF	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)

#99B4F2

Deuteranopia (green-blind)

#86A6EE

Tritanopia (blue-blind)

#00C2C8

Achromatopsia (no color)

#ACACAC

Design tokens & code

CSS

--color: #66b3ef;
/* rgb */ color: rgb(102, 179, 239);
/* oklch */ color: oklch(74.1% 0.116 243.8);

Tailwind

colors: {
  custom: {
    50: '#9bc9f4',
    500: '#66b3ef',
    950: '#000000',
  },
}

SCSS

$custom: #66b3ef;
$custom-light: #9bc9f4;
$custom-dark: #000000;

JSON

{
  "hex": "#66b3ef",
  "rgb": {
    "r": 102,
    "g": 179,
    "b": 239
  },
  "hsl": {
    "h": 206.277,
    "s": 81.065,
    "l": 66.863
  },
  "oklch": {
    "l": 0.74138,
    "c": 0.11605,
    "h": 243.8
  },
  "luminance": 0.41297
}

Semantic roles & 50–950 ramp

primary

#66B3EF

secondary

#EED6C2

accent

#6608DD

background

#FAFCFE

surface

#F4F8FD

border

#CED1D5

text

#0F1317

muted

#7F8285

Preview Lab

Preview with #66B3EF

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

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