#66B4F1#66B4F1

#66B4F1 is a light, moderate cyan. Relative luminance 0.418; OKLCH L 74.5% C 0.118 H 243.9°. Best body text is #000000 at 9.36:1 contrast (WCAG AA passes).

Color values

HEX	#66B4F1
RGB	rgb(102, 180, 241)
HSL	hsl(206, 83%, 67%)
HSV	hsv(206, 58%, 95%)
CMYK	cmyk(57.7%, 25.3%, 0%, 5.5%)
CIE-LAB	lab(70.74, -6.61, -37.64)
CIE-LCH	lch(70.74, 38.22, 260.04°)
OKLab	oklab(74.45% -0.0517 -0.1056)
OKLCH	oklch(74.45% 0.118 243.9)
XYZ	xyz(37.6721, 41.8148, 89.2878)
Luminance	0.4182 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66B4F1 #F1A366

analogous

#66F1E9 #66B4F1 #666EF1

triadic

#66B4F1 #F166B4 #B4F166

tetradic

#66B4F1 #E966F1 #F1A366 #6EF166

square

#66B4F1 #E966F1 #F1A366 #6EF166

split-complementary

#66B4F1 #F1666E #F1E966

monochromatic

#127ACA #2E99EC #66B4F1 #9ECFF6 #D6EBFB

Accessibility & contrast

On white

2.24

#66B4F1 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.36

#66B4F1 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66B4F1

9.36:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66B4F1	#FFFFFF	#000000	##000000
##66B4F1	1.00	2.24	9.36	9.36
#FFFFFF	2.24	1.00	21.00	21.00
#000000	9.36	21.00	1.00	1.00
##000000	9.36	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#99B5F4

Deuteranopia (green-blind)

#87A7F0

Tritanopia (blue-blind)

#00C3C9

Achromatopsia (no color)

#ADADAD

Design tokens & code

CSS

--color: #66b4f1;
/* rgb */ color: rgb(102, 180, 241);
/* oklch */ color: oklch(74.5% 0.118 243.9);

Tailwind

colors: {
  custom: {
    50: '#9ccaf6',
    500: '#66b4f1',
    950: '#000000',
  },
}

SCSS

$custom: #66b4f1;
$custom-light: #9ccaf6;
$custom-dark: #000000;

JSON

{
  "hex": "#66b4f1",
  "rgb": {
    "r": 102,
    "g": 180,
    "b": 241
  },
  "hsl": {
    "h": 206.331,
    "s": 83.234,
    "l": 67.255
  },
  "oklch": {
    "l": 0.74451,
    "c": 0.1176,
    "h": 243.9
  },
  "luminance": 0.41818
}

Semantic roles & 50–950 ramp

primary

#66B4F1

secondary

#EFD7C3

accent

#6506E0

background

#FAFCFF

surface

#F4F8FE

border

#CED1D6

text

#0F1317

muted

#7F8285

Preview Lab

Preview with #66B4F1

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

Preview Lab → · Contrast checker → · Palette generator →