#66B7EF#66B7EF

#66B7EF is a light, moderate cyan. Relative luminance 0.429; OKLCH L 75.0% C 0.114 H 240.7°. Best body text is #000000 at 9.58:1 contrast (WCAG AA passes).

Color values

HEX	#66B7EF
RGB	rgb(102, 183, 239)
HSL	hsl(205, 81%, 67%)
HSV	hsv(205, 57%, 94%)
CMYK	cmyk(57.3%, 23.4%, 0%, 6.3%)
CIE-LAB	lab(71.50, -8.86, -35.38)
CIE-LCH	lch(71.50, 36.47, 255.94°)
OKLab	oklab(75.02% -0.0555 -0.0991)
OKLCH	oklch(75.02% 0.114 240.7)
XYZ	xyz(37.9872, 42.9203, 87.9272)
Luminance	0.4292 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66B7EF #EF9E66

analogous

#66EFE3 #66B7EF #6673EF

triadic

#66B7EF #EF66B7 #B7EF66

tetradic

#66B7EF #E366EF #EF9E66 #73EF66

square

#66B7EF #E366EF #EF9E66 #73EF66

split-complementary

#66B7EF #EF6673 #EFE366

monochromatic

#157DC6 #2F9DE9 #66B7EF #9DD1F5 #D5EBFB

Accessibility & contrast

On white

2.19

#66B7EF on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.58

#66B7EF on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66B7EF

9.58:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66B7EF	#FFFFFF	#000000	##000000
##66B7EF	1.00	2.19	9.58	9.58
#FFFFFF	2.19	1.00	21.00	21.00
#000000	9.58	21.00	1.00	1.00
##000000	9.58	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#9EB7F2

Deuteranopia (green-blind)

#8BA9EE

Tritanopia (blue-blind)

#00C5CA

Achromatopsia (no color)

#AFAFAF

Design tokens & code

CSS

--color: #66b7ef;
/* rgb */ color: rgb(102, 183, 239);
/* oklch */ color: oklch(75.0% 0.114 240.7);

Tailwind

colors: {
  custom: {
    50: '#9cccf4',
    500: '#66b7ef',
    950: '#000000',
  },
}

SCSS

$custom: #66b7ef;
$custom-light: #9cccf4;
$custom-dark: #000000;

JSON

{
  "hex": "#66b7ef",
  "rgb": {
    "r": 102,
    "g": 183,
    "b": 239
  },
  "hsl": {
    "h": 204.526,
    "s": 81.065,
    "l": 66.863
  },
  "oklch": {
    "l": 0.75023,
    "c": 0.1136,
    "h": 240.7
  },
  "luminance": 0.42924
}

Semantic roles & 50–950 ramp

primary

#66B7EF

secondary

#EED4C2

accent

#5F08DD

background

#FAFCFE

surface

#F4F8FD

border

#CED1D5

text

#0F1317

muted

#7F8285

Preview Lab

Preview with #66B7EF

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

Preview Lab → · Contrast checker → · Palette generator →