#66B9F3#66B9F3

#66B9F3 is a light, moderate cyan. Relative luminance 0.440; OKLCH L 75.6% C 0.117 H 241.1°. Best body text is #000000 at 9.80:1 contrast (WCAG AA passes).

Color values

HEX	#66B9F3
RGB	rgb(102, 185, 243)
HSL	hsl(205, 85%, 68%)
HSV	hsv(205, 58%, 95%)
CMYK	cmyk(58%, 23.9%, 0%, 4.7%)
CIE-LAB	lab(72.22, -8.72, -36.43)
CIE-LCH	lch(72.22, 37.46, 256.54°)
OKLab	oklab(75.65% -0.0564 -0.1021)
OKLCH	oklch(75.65% 0.117 241.1)
XYZ	xyz(39.0001, 43.9902, 91.2123)
Luminance	0.4399 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66B9F3 #F3A066

analogous

#66F3E7 #66B9F3 #6672F3

triadic

#66B9F3 #F366B9 #B9F366

tetradic

#66B9F3 #E766F3 #F3A066 #72F366

square

#66B9F3 #E766F3 #F3A066 #72F366

split-complementary

#66B9F3 #F36672 #F3E766

monochromatic

#1080CE #2D9FEF #66B9F3 #9FD3F7 #D7EDFC

Accessibility & contrast

On white

2.14

#66B9F3 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.80

#66B9F3 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66B9F3

9.80:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66B9F3	#FFFFFF	#000000	##000000
##66B9F3	1.00	2.14	9.80	9.80
#FFFFFF	2.14	1.00	21.00	21.00
#000000	9.80	21.00	1.00	1.00
##000000	9.80	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#9FB9F6

Deuteranopia (green-blind)

#8CABF2

Tritanopia (blue-blind)

#00C7CD

Achromatopsia (no color)

#B1B1B1

Design tokens & code

CSS

--color: #66b9f3;
/* rgb */ color: rgb(102, 185, 243);
/* oklch */ color: oklch(75.6% 0.117 241.1);

Tailwind

colors: {
  custom: {
    50: '#9ccdf7',
    500: '#66b9f3',
    950: '#000000',
  },
}

SCSS

$custom: #66b9f3;
$custom-light: #9ccdf7;
$custom-dark: #000000;

JSON

{
  "hex": "#66b9f3",
  "rgb": {
    "r": 102,
    "g": 185,
    "b": 243
  },
  "hsl": {
    "h": 204.681,
    "s": 85.455,
    "l": 67.647
  },
  "oklch": {
    "l": 0.75647,
    "c": 0.11664,
    "h": 241.1
  },
  "luminance": 0.43994
}

Semantic roles & 50–950 ramp

primary

#66B9F3

secondary

#F0D7C5

accent

#5F04E2

background

#FAFCFF

surface

#F4F9FE

border

#CED2D6

text

#0F1317

muted

#7F8285

Preview Lab

Preview with #66B9F3

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

Preview Lab → · Contrast checker → · Palette generator →