#66B3EE#66B3EE

#66B3EE is a light, moderate cyan. Relative luminance 0.412; OKLCH L 74.1% C 0.115 H 243.4°. Best body text is #000000 at 9.25:1 contrast (WCAG AA passes).

Color values

HEX	#66B3EE
RGB	rgb(102, 179, 238)
HSL	hsl(206, 80%, 67%)
HSV	hsv(206, 57%, 93%)
CMYK	cmyk(57.1%, 24.8%, 0%, 6.7%)
CIE-LAB	lab(70.34, -6.99, -36.64)
CIE-LCH	lch(70.34, 37.30, 259.21°)
OKLab	oklab(74.09% -0.0516 -0.1027)
OKLCH	oklch(74.09% 0.115 243.4)
XYZ	xyz(37.0265, 41.2347, 86.8802)
Luminance	0.4124 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66B3EE #EEA166

analogous

#66EEE5 #66B3EE #666FEE

triadic

#66B3EE #EE66B3 #B3EE66

tetradic

#66B3EE #E566EE #EEA166 #6FEE66

square

#66B3EE #E566EE #EEA166 #6FEE66

split-complementary

#66B3EE #EE666F #EEE566

monochromatic

#1678C4 #2F98E8 #66B3EE #9DCEF4 #D4EAFA

Accessibility & contrast

On white

2.27

#66B3EE on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.25

#66B3EE on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66B3EE

9.25:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66B3EE	#FFFFFF	#000000	##000000
##66B3EE	1.00	2.27	9.25	9.25
#FFFFFF	2.27	1.00	21.00	21.00
#000000	9.25	21.00	1.00	1.00
##000000	9.25	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#99B4F1

Deuteranopia (green-blind)

#87A6ED

Tritanopia (blue-blind)

#00C1C7

Achromatopsia (no color)

#ACACAC

Design tokens & code

CSS

--color: #66b3ee;
/* rgb */ color: rgb(102, 179, 238);
/* oklch */ color: oklch(74.1% 0.115 243.4);

Tailwind

colors: {
  custom: {
    50: '#9bc9f3',
    500: '#66b3ee',
    950: '#000000',
  },
}

SCSS

$custom: #66b3ee;
$custom-light: #9bc9f3;
$custom-dark: #000000;

JSON

{
  "hex": "#66b3ee",
  "rgb": {
    "r": 102,
    "g": 179,
    "b": 238
  },
  "hsl": {
    "h": 206.029,
    "s": 80,
    "l": 66.667
  },
  "oklch": {
    "l": 0.74092,
    "c": 0.11495,
    "h": 243.4
  },
  "luminance": 0.41238
}

Semantic roles & 50–950 ramp

primary

#66B3EE

secondary

#EED5C2

accent

#6509DC

background

#FAFCFE

surface

#F4F8FD

border

#CED1D5

text

#0F1317

muted

#7F8285

Preview Lab

Preview with #66B3EE

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

Preview Lab → · Contrast checker → · Palette generator →