#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
RGBrgb(102, 180, 241)
HSLhsl(206, 83%, 67%)
HSVhsv(206, 58%, 95%)
CMYKcmyk(57.7%, 25.3%, 0%, 5.5%)
CIE-LABlab(70.74, -6.61, -37.64)
CIE-LCHlch(70.74, 38.22, 260.04°)
OKLaboklab(74.45% -0.0517 -0.1056)
OKLCHoklch(74.45% 0.118 243.9)
XYZxyz(37.6721, 41.8148, 89.2878)
Luminance0.4182 (WCAG relative)
Temperaturecool
Familycyan

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
##66B4F11.002.249.369.36
#FFFFFF2.241.0021.0021.00
#0000009.3621.001.001.00
##0000009.3621.001.001.00

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 →

#66B4F1 Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva