#66B7E9#66B7E9

#66B7E9 is a light, moderate cyan. Relative luminance 0.426; OKLCH L 74.8% C 0.107 H 237.6°. Best body text is #000000 at 9.51:1 contrast (WCAG AA passes).

Color values

HEX	#66B7E9
RGB	rgb(102, 183, 233)
HSL	hsl(203, 75%, 66%)
HSV	hsv(203, 56%, 91%)
CMYK	cmyk(56.2%, 21.5%, 0%, 8.6%)
CIE-LAB	lab(71.26, -10.67, -32.49)
CIE-LCH	lch(71.26, 34.20, 251.82°)
OKLab	oklab(74.76% -0.0575 -0.0908)
OKLCH	oklch(74.76% 0.107 237.6)
XYZ	xyz(37.1155, 42.5716, 83.3362)
Luminance	0.4258 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66B7E9 #E99866

analogous

#66E9DA #66B7E9 #6675E9

triadic

#66B7E9 #E966B7 #B7E966

tetradic

#66B7E9 #DA66E9 #E99866 #75E966

square

#66B7E9 #DA66E9 #E99866 #75E966

split-complementary

#66B7E9 #E96675 #E9DA66

monochromatic

#1B7DBA #309EE1 #66B7E9 #9CD0F1 #D1E9F8

Accessibility & contrast

On white

2.21

#66B7E9 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.51

#66B7E9 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66B7E9

9.51:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66B7E9	#FFFFFF	#000000	##000000
##66B7E9	1.00	2.21	9.51	9.51
#FFFFFF	2.21	1.00	21.00	21.00
#000000	9.51	21.00	1.00	1.00
##000000	9.51	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#A0B6EB

Deuteranopia (green-blind)

#8EA9E8

Tritanopia (blue-blind)

#00C4C8

Achromatopsia (no color)

#AEAEAE

Design tokens & code

CSS

--color: #66b7e9;
/* rgb */ color: rgb(102, 183, 233);
/* oklch */ color: oklch(74.8% 0.107 237.6);

Tailwind

colors: {
  custom: {
    50: '#9bccf0',
    500: '#66b7e9',
    950: '#000000',
  },
}

SCSS

$custom: #66b7e9;
$custom-light: #9bccf0;
$custom-dark: #000000;

JSON

{
  "hex": "#66b7e9",
  "rgb": {
    "r": 102,
    "g": 183,
    "b": 233
  },
  "hsl": {
    "h": 202.901,
    "s": 74.857,
    "l": 65.686
  },
  "oklch": {
    "l": 0.74757,
    "c": 0.10749,
    "h": 237.6
  },
  "luminance": 0.42575
}

Semantic roles & 50–950 ramp

primary

#66B7E9

secondary

#EBD0C0

accent

#5B0ED7

background

#FAFCFE

surface

#F3F8FD

border

#CDD1D5

text

#0F1316

muted

#7F8284

Preview Lab

Preview with #66B7E9

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

Preview Lab → · Contrast checker → · Palette generator →