#66B8FD#66B8FD

#66B8FD is a light, vivid cyan. Relative luminance 0.442; OKLCH L 75.9% C 0.128 H 246.0°. Best body text is #000000 at 9.84:1 contrast (WCAG AA passes).

Color values

HEX	#66B8FD
RGB	rgb(102, 184, 253)
HSL	hsl(207, 97%, 70%)
HSV	hsv(207, 60%, 99%)
CMYK	cmyk(59.7%, 27.3%, 0%, 0.8%)
CIE-LAB	lab(72.36, -5.09, -41.62)
CIE-LCH	lch(72.36, 41.93, 263.03°)
OKLab	oklab(75.89% -0.0522 -0.1171)
OKLCH	oklch(75.89% 0.128 246)
XYZ	xyz(40.3431, 44.1938, 99.3137)
Luminance	0.4420 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66B8FD #FDAB66

analogous

#66FDF6 #66B8FD #666DFD

triadic

#66B8FD #FD66B8 #B8FD66

tetradic

#66B8FD #F666FD #FDAB66 #6DFD66

square

#66B8FD #F666FD #FDAB66 #6DFD66

split-complementary

#66B8FD #FD666D #FDF666

monochromatic

#037EE6 #2A9CFC #66B8FD #A2D4FE #DFF0FF

Accessibility & contrast

On white

2.13

#66B8FD on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.84

#66B8FD on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66B8FD

9.84:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66B8FD	#FFFFFF	#000000	##000000
##66B8FD	1.00	2.13	9.84	9.84
#FFFFFF	2.13	1.00	21.00	21.00
#000000	9.84	21.00	1.00	1.00
##000000	9.84	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#9ABAFF

Deuteranopia (green-blind)

#86ABFC

Tritanopia (blue-blind)

#00C8D0

Achromatopsia (no color)

#B1B1B1

Design tokens & code

CSS

--color: #66b8fd;
/* rgb */ color: rgb(102, 184, 253);
/* oklch */ color: oklch(75.9% 0.128 246.0);

Tailwind

colors: {
  custom: {
    50: '#9dcdfe',
    500: '#66b8fd',
    950: '#000000',
  },
}

SCSS

$custom: #66b8fd;
$custom-light: #9dcdfe;
$custom-dark: #000000;

JSON

{
  "hex": "#66b8fd",
  "rgb": {
    "r": 102,
    "g": 184,
    "b": 253
  },
  "hsl": {
    "h": 207.417,
    "s": 97.419,
    "l": 69.608
  },
  "oklch": {
    "l": 0.75891,
    "c": 0.12821,
    "h": 246
  },
  "luminance": 0.44198
}

Semantic roles & 50–950 ramp

primary

#66B8FD

secondary

#F5DECA

accent

#6900E6

background

#FAFCFF

surface

#F4F8FF

border

#CED1D7

text

#0F1318

muted

#7F8286

Preview Lab

Preview with #66B8FD

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

Preview Lab → · Contrast checker → · Palette generator →