#66B3FB#66B3FB

#66B3FB is a light, vivid cyan. Relative luminance 0.420; OKLCH L 74.7% C 0.130 H 248.5°. Best body text is #000000 at 9.41:1 contrast (WCAG AA passes).

Color values

HEX	#66B3FB
RGB	rgb(102, 179, 251)
HSL	hsl(209, 95%, 69%)
HSV	hsv(209, 59%, 98%)
CMYK	cmyk(59.4%, 28.7%, 0%, 1.6%)
CIE-LAB	lab(70.89, -2.96, -42.83)
CIE-LCH	lch(70.89, 42.94, 266.05°)
OKLab	oklab(74.71% -0.0476 -0.1206)
OKLCH	oklch(74.71% 0.13 248.5)
XYZ	xyz(39.0058, 42.0264, 97.3044)
Luminance	0.4203 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66B3FB #FBAE66

analogous

#66FBF8 #66B3FB #6669FB

triadic

#66B3FB #FB66B3 #B3FB66

tetradic

#66B3FB #F866FB #FBAE66 #69FB66

square

#66B3FB #F866FB #FBAE66 #69FB66

split-complementary

#66B3FB #FB6669 #FBF866

monochromatic

#0677E1 #2A95F9 #66B3FB #A2D1FD #DDEEFE

Accessibility & contrast

On white

2.23

#66B3FB on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.41

#66B3FB on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66B3FB

9.41:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66B3FB	#FFFFFF	#000000	##000000
##66B3FB	1.00	2.23	9.41	9.41
#FFFFFF	2.23	1.00	21.00	21.00
#000000	9.41	21.00	1.00	1.00
##000000	9.41	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#94B6FE

Deuteranopia (green-blind)

#80A7FA

Tritanopia (blue-blind)

#00C4CC

Achromatopsia (no color)

#ADADAD

Design tokens & code

CSS

--color: #66b3fb;
/* rgb */ color: rgb(102, 179, 251);
/* oklch */ color: oklch(74.7% 0.130 248.5);

Tailwind

colors: {
  custom: {
    50: '#9dc9fd',
    500: '#66b3fb',
    950: '#000000',
  },
}

SCSS

$custom: #66b3fb;
$custom-light: #9dc9fd;
$custom-dark: #000000;

JSON

{
  "hex": "#66b3fb",
  "rgb": {
    "r": 102,
    "g": 179,
    "b": 251
  },
  "hsl": {
    "h": 208.993,
    "s": 94.904,
    "l": 69.216
  },
  "oklch": {
    "l": 0.74706,
    "c": 0.1297,
    "h": 248.5
  },
  "luminance": 0.4203
}

Semantic roles & 50–950 ramp

primary

#66B3FB

secondary

#F4DEC9

accent

#6F00E6

background

#FAFCFF

surface

#F4F8FF

border

#CED1D7

text

#0F1317

muted

#7F8285

Preview Lab

Preview with #66B3FB

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

Preview Lab → · Contrast checker → · Palette generator →