#66BDF5#66BDF5

#66BDF5 is a light, moderate cyan. Relative luminance 0.458; OKLCH L 76.6% C 0.116 H 239.0°. Best body text is #000000 at 10.16:1 contrast (WCAG AA passes).

Color values

HEX	#66BDF5
RGB	rgb(102, 189, 245)
HSL	hsl(203, 88%, 68%)
HSV	hsv(203, 58%, 96%)
CMYK	cmyk(58.4%, 22.9%, 0%, 3.9%)
CIE-LAB	lab(73.42, -10.27, -35.65)
CIE-LCH	lch(73.42, 37.10, 253.93°)
OKLab	oklab(76.62% -0.06 -0.0998)
OKLCH	oklch(76.62% 0.116 239)
XYZ	xyz(40.1523, 45.8088, 93.0945)
Luminance	0.4581 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66BDF5 #F59E66

analogous

#66F5E6 #66BDF5 #6675F5

triadic

#66BDF5 #F566BD #BDF566

tetradic

#66BDF5 #E666F5 #F59E66 #75F566

square

#66BDF5 #E666F5 #F59E66 #75F566

split-complementary

#66BDF5 #F56675 #F5E666

monochromatic

#0E86D3 #2DA4F1 #66BDF5 #9FD6F9 #D9EFFD

Accessibility & contrast

On white

2.07

#66BDF5 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

10.16

#66BDF5 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66BDF5

10.16:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66BDF5	#FFFFFF	#000000	##000000
##66BDF5	1.00	2.07	10.16	10.16
#FFFFFF	2.07	1.00	21.00	21.00
#000000	10.16	21.00	1.00	1.00
##000000	10.16	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#A4BDF8

Deuteranopia (green-blind)

#90AEF4

Tritanopia (blue-blind)

#00CBD0

Achromatopsia (no color)

#B4B4B4

Design tokens & code

CSS

--color: #66bdf5;
/* rgb */ color: rgb(102, 189, 245);
/* oklch */ color: oklch(76.6% 0.116 239.0);

Tailwind

colors: {
  custom: {
    50: '#9cd0f8',
    500: '#66bdf5',
    950: '#000000',
  },
}

SCSS

$custom: #66bdf5;
$custom-light: #9cd0f8;
$custom-dark: #000000;

JSON

{
  "hex": "#66bdf5",
  "rgb": {
    "r": 102,
    "g": 189,
    "b": 245
  },
  "hsl": {
    "h": 203.497,
    "s": 87.73,
    "l": 68.039
  },
  "oklch": {
    "l": 0.76623,
    "c": 0.11647,
    "h": 239
  },
  "luminance": 0.45813
}

Semantic roles & 50–950 ramp

primary

#66BDF5

secondary

#F1D7C6

accent

#5A01E4

background

#FAFCFF

surface

#F4F9FF

border

#CED2D7

text

#0F1417

muted

#7F8285

Preview Lab

Preview with #66BDF5

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

Preview Lab → · Contrast checker → · Palette generator →