#66BDF6#66BDF6

#66BDF6 is a light, moderate cyan. Relative luminance 0.459; OKLCH L 76.7% C 0.117 H 239.5°. Best body text is #000000 at 10.17:1 contrast (WCAG AA passes).

Color values

HEX	#66BDF6
RGB	rgb(102, 189, 246)
HSL	hsl(204, 89%, 68%)
HSV	hsv(204, 59%, 96%)
CMYK	cmyk(58.5%, 23.2%, 0%, 3.5%)
CIE-LAB	lab(73.46, -9.96, -36.13)
CIE-LCH	lch(73.46, 37.48, 254.58°)
OKLab	oklab(76.67% -0.0596 -0.1012)
OKLCH	oklch(76.67% 0.117 239.5)
XYZ	xyz(40.3054, 45.8700, 93.9006)
Luminance	0.4587 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66BDF6 #F69F66

analogous

#66F6E7 #66BDF6 #6675F6

triadic

#66BDF6 #F666BD #BDF666

tetradic

#66BDF6 #E766F6 #F69F66 #75F666

square

#66BDF6 #E766F6 #F69F66 #75F666

split-complementary

#66BDF6 #F66675 #F6E766

monochromatic

#0D86D5 #2CA4F3 #66BDF6 #A0D6F9 #DAEFFD

Accessibility & contrast

On white

2.06

#66BDF6 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

10.17

#66BDF6 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66BDF6

10.17:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66BDF6	#FFFFFF	#000000	##000000
##66BDF6	1.00	2.06	10.17	10.17
#FFFFFF	2.06	1.00	21.00	21.00
#000000	10.17	21.00	1.00	1.00
##000000	10.17	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#A3BDF9

Deuteranopia (green-blind)

#8FAEF5

Tritanopia (blue-blind)

#00CBD0

Achromatopsia (no color)

#B4B4B4

Design tokens & code

CSS

--color: #66bdf6;
/* rgb */ color: rgb(102, 189, 246);
/* oklch */ color: oklch(76.7% 0.117 239.5);

Tailwind

colors: {
  custom: {
    50: '#9cd0f9',
    500: '#66bdf6',
    950: '#000000',
  },
}

SCSS

$custom: #66bdf6;
$custom-light: #9cd0f9;
$custom-dark: #000000;

JSON

{
  "hex": "#66bdf6",
  "rgb": {
    "r": 102,
    "g": 189,
    "b": 246
  },
  "hsl": {
    "h": 203.75,
    "s": 88.889,
    "l": 68.235
  },
  "oklch": {
    "l": 0.76668,
    "c": 0.11748,
    "h": 239.5
  },
  "luminance": 0.45874
}

Semantic roles & 50–950 ramp

primary

#66BDF6

secondary

#F2D7C6

accent

#5B00E6

background

#FAFCFF

surface

#F4F9FF

border

#CED2D7

text

#0F1417

muted

#7F8285

Preview Lab

Preview with #66BDF6

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

Preview Lab → · Contrast checker → · Palette generator →