#66BBF9#66BBF9

#66BBF9 is a light, vivid cyan. Relative luminance 0.452; OKLCH L 76.4% C 0.122 H 242.3°. Best body text is #000000 at 10.04:1 contrast (WCAG AA passes).

Color values

HEX	#66BBF9
RGB	rgb(102, 187, 249)
HSL	hsl(205, 92%, 69%)
HSV	hsv(205, 59%, 98%)
CMYK	cmyk(59%, 24.9%, 0%, 2.4%)
CIE-LAB	lab(73.02, -7.96, -38.42)
CIE-LCH	lch(73.02, 39.24, 258.29°)
OKLab	oklab(76.36% -0.0566 -0.1078)
OKLCH	oklch(76.36% 0.122 242.3)
XYZ	xyz(40.3423, 45.2012, 96.2029)
Luminance	0.4521 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66BBF9 #F9A466

analogous

#66F9EE #66BBF9 #6672F9

triadic

#66BBF9 #F966BB #BBF966

tetradic

#66BBF9 #EE66F9 #F9A466 #72F966

square

#66BBF9 #EE66F9 #F9A466 #72F966

split-complementary

#66BBF9 #F96672 #F9EE66

monochromatic

#0983DC #2BA1F7 #66BBF9 #A1D5FB #DCEFFE

Accessibility & contrast

On white

2.09

#66BBF9 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

10.04

#66BBF9 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66BBF9

10.04:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66BBF9	#FFFFFF	#000000	##000000
##66BBF9	1.00	2.09	10.04	10.04
#FFFFFF	2.09	1.00	21.00	21.00
#000000	10.04	21.00	1.00	1.00
##000000	10.04	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#A0BCFC

Deuteranopia (green-blind)

#8CADF8

Tritanopia (blue-blind)

#00CAD0

Achromatopsia (no color)

#B3B3B3

Design tokens & code

CSS

--color: #66bbf9;
/* rgb */ color: rgb(102, 187, 249);
/* oklch */ color: oklch(76.4% 0.122 242.3);

Tailwind

colors: {
  custom: {
    50: '#9dcffb',
    500: '#66bbf9',
    950: '#000000',
  },
}

SCSS

$custom: #66bbf9;
$custom-light: #9dcffb;
$custom-dark: #000000;

JSON

{
  "hex": "#66bbf9",
  "rgb": {
    "r": 102,
    "g": 187,
    "b": 249
  },
  "hsl": {
    "h": 205.306,
    "s": 92.453,
    "l": 68.824
  },
  "oklch": {
    "l": 0.76362,
    "c": 0.12178,
    "h": 242.3
  },
  "luminance": 0.45205
}

Semantic roles & 50–950 ramp

primary

#66BBF9

secondary

#F3DAC8

accent

#6100E6

background

#FAFCFF

surface

#F4F9FF

border

#CED2D7

text

#0F1317

muted

#7F8285

Preview Lab

Preview with #66BBF9

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

Preview Lab → · Contrast checker → · Palette generator →