#66B3F8#66B3F8

#66B3F8 is a light, vivid cyan. Relative luminance 0.418; OKLCH L 74.6% C 0.126 H 247.4°. Best body text is #000000 at 9.37:1 contrast (WCAG AA passes).

Color values

HEX	#66B3F8
RGB	rgb(102, 179, 248)
HSL	hsl(208, 91%, 69%)
HSV	hsv(208, 59%, 97%)
CMYK	cmyk(58.9%, 27.8%, 0%, 2.7%)
CIE-LAB	lab(70.76, -3.90, -41.41)
CIE-LCH	lch(70.76, 41.60, 264.63°)
OKLab	oklab(74.56% -0.0485 -0.1165)
OKLCH	oklch(74.56% 0.126 247.4)
XYZ	xyz(38.5367, 41.8388, 94.8336)
Luminance	0.4184 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66B3F8 #F8AB66

analogous

#66F8F4 #66B3F8 #666AF8

triadic

#66B3F8 #F866B3 #B3F866

tetradic

#66B3F8 #F466F8 #F8AB66 #6AF866

square

#66B3F8 #F466F8 #F8AB66 #6AF866

split-complementary

#66B3F8 #F8666A #F8F466

monochromatic

#0A77DA #2B96F5 #66B3F8 #A1D0FB #DBEDFD

Accessibility & contrast

On white

2.24

#66B3F8 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.37

#66B3F8 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66B3F8

9.37:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66B3F8	#FFFFFF	#000000	##000000
##66B3F8	1.00	2.24	9.37	9.37
#FFFFFF	2.24	1.00	21.00	21.00
#000000	9.37	21.00	1.00	1.00
##000000	9.37	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#95B5FB

Deuteranopia (green-blind)

#82A7F7

Tritanopia (blue-blind)

#00C3CB

Achromatopsia (no color)

#ADADAD

Design tokens & code

CSS

--color: #66b3f8;
/* rgb */ color: rgb(102, 179, 248);
/* oklch */ color: oklch(74.6% 0.126 247.4);

Tailwind

colors: {
  custom: {
    50: '#9cc9fb',
    500: '#66b3f8',
    950: '#000000',
  },
}

SCSS

$custom: #66b3f8;
$custom-light: #9cc9fb;
$custom-dark: #000000;

JSON

{
  "hex": "#66b3f8",
  "rgb": {
    "r": 102,
    "g": 179,
    "b": 248
  },
  "hsl": {
    "h": 208.356,
    "s": 91.25,
    "l": 68.627
  },
  "oklch": {
    "l": 0.74561,
    "c": 0.12622,
    "h": 247.4
  },
  "luminance": 0.41842
}

Semantic roles & 50–950 ramp

primary

#66B3F8

secondary

#F3DCC7

accent

#6C00E6

background

#FAFCFF

surface

#F4F8FF

border

#CED1D7

text

#0F1317

muted

#7F8285

Preview Lab

Preview with #66B3F8

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

Preview Lab → · Contrast checker → · Palette generator →