#66B0FD#66B0FD

#66B0FD is a light, vivid cyan. Relative luminance 0.410; OKLCH L 74.2% C 0.135 H 250.9°. Best body text is #000000 at 9.19:1 contrast (WCAG AA passes).

Color values

HEX	#66B0FD
RGB	rgb(102, 176, 253)
HSL	hsl(211, 97%, 70%)
HSV	hsv(211, 60%, 99%)
CMYK	cmyk(59.7%, 30.4%, 0%, 0.8%)
CIE-LAB	lab(70.15, -0.66, -45.07)
CIE-LCH	lch(70.15, 45.08, 269.16°)
OKLab	oklab(74.15% -0.0439 -0.1272)
OKLCH	oklch(74.15% 0.135 250.9)
XYZ	xyz(38.7280, 40.9637, 98.7753)
Luminance	0.4097 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66B0FD #FDB366

analogous

#66FBFD #66B0FD #6866FD

triadic

#66B0FD #FD66B0 #B0FD66

tetradic

#66B0FD #FD66FB #FDB366 #66FD68

square

#66B0FD #FD66FB #FDB366 #66FD68

split-complementary

#66B0FD #FD6866 #FBFD66

monochromatic

#0372E6 #2A91FC #66B0FD #A2CFFE #DFEEFF

Accessibility & contrast

On white

2.28

#66B0FD on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.19

#66B0FD on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66B0FD

9.19:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66B0FD	#FFFFFF	#000000	##000000
##66B0FD	1.00	2.28	9.19	9.19
#FFFFFF	2.28	1.00	21.00	21.00
#000000	9.19	21.00	1.00	1.00
##000000	9.19	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#8FB4FF

Deuteranopia (green-blind)

#7BA5FB

Tritanopia (blue-blind)

#00C2CB

Achromatopsia (no color)

#ABABAB

Design tokens & code

CSS

--color: #66b0fd;
/* rgb */ color: rgb(102, 176, 253);
/* oklch */ color: oklch(74.2% 0.135 250.9);

Tailwind

colors: {
  custom: {
    50: '#9dc7fe',
    500: '#66b0fd',
    950: '#000000',
  },
}

SCSS

$custom: #66b0fd;
$custom-light: #9dc7fe;
$custom-dark: #000000;

JSON

{
  "hex": "#66b0fd",
  "rgb": {
    "r": 102,
    "g": 176,
    "b": 253
  },
  "hsl": {
    "h": 210.596,
    "s": 97.419,
    "l": 69.608
  },
  "oklch": {
    "l": 0.74154,
    "c": 0.13453,
    "h": 250.9
  },
  "luminance": 0.40967
}

Semantic roles & 50–950 ramp

primary

#66B0FD

secondary

#F5E0CA

accent

#7500E6

background

#FAFCFF

surface

#F4F8FF

border

#CED1D7

text

#0F1318

muted

#7F8286

Preview Lab

Preview with #66B0FD

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

Preview Lab → · Contrast checker → · Palette generator →