#66B4F5#66B4F5

#66B4F5 is a light, vivid cyan. Relative luminance 0.421; OKLCH L 74.6% C 0.122 H 245.6°. Best body text is #000000 at 9.41:1 contrast (WCAG AA passes).

Color values

HEX	#66B4F5
RGB	rgb(102, 180, 245)
HSL	hsl(207, 88%, 68%)
HSV	hsv(207, 58%, 96%)
CMYK	cmyk(58.4%, 26.5%, 0%, 3.9%)
CIE-LAB	lab(70.91, -5.38, -39.55)
CIE-LCH	lch(70.91, 39.92, 262.26°)
OKLab	oklab(74.64% -0.0504 -0.1111)
OKLCH	oklch(74.64% 0.122 245.6)
XYZ	xyz(38.2761, 42.0564, 92.4691)
Luminance	0.4206 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66B4F5 #F5A766

analogous

#66F5EF #66B4F5 #666CF5

triadic

#66B4F5 #F566B4 #B4F566

tetradic

#66B4F5 #EF66F5 #F5A766 #6CF566

square

#66B4F5 #EF66F5 #F5A766 #6CF566

split-complementary

#66B4F5 #F5666C #F5EF66

monochromatic

#0E79D3 #2D98F1 #66B4F5 #9FD0F9 #D9ECFD

Accessibility & contrast

On white

2.23

#66B4F5 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.41

#66B4F5 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66B4F5

9.41:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66B4F5	#FFFFFF	#000000	##000000
##66B4F5	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)

#98B5F8

Deuteranopia (green-blind)

#85A7F4

Tritanopia (blue-blind)

#00C4CA

Achromatopsia (no color)

#AEAEAE

Design tokens & code

CSS

--color: #66b4f5;
/* rgb */ color: rgb(102, 180, 245);
/* oklch */ color: oklch(74.6% 0.122 245.6);

Tailwind

colors: {
  custom: {
    50: '#9ccaf8',
    500: '#66b4f5',
    950: '#000000',
  },
}

SCSS

$custom: #66b4f5;
$custom-light: #9ccaf8;
$custom-dark: #000000;

JSON

{
  "hex": "#66b4f5",
  "rgb": {
    "r": 102,
    "g": 180,
    "b": 245
  },
  "hsl": {
    "h": 207.273,
    "s": 87.73,
    "l": 68.039
  },
  "oklch": {
    "l": 0.74638,
    "c": 0.12205,
    "h": 245.6
  },
  "luminance": 0.4206
}

Semantic roles & 50–950 ramp

primary

#66B4F5

secondary

#F1D9C6

accent

#6801E4

background

#FAFCFF

surface

#F4F8FF

border

#CED1D7

text

#0F1317

muted

#7F8285

Preview Lab

Preview with #66B4F5

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

Preview Lab → · Contrast checker → · Palette generator →