#66B1F0#66B1F0

#66B1F0 is a light, moderate cyan. Relative luminance 0.406; OKLCH L 73.7% C 0.119 H 245.7°. Best body text is #000000 at 9.11:1 contrast (WCAG AA passes).

Color values

HEX	#66B1F0
RGB	rgb(102, 177, 240)
HSL	hsl(207, 82%, 67%)
HSV	hsv(207, 58%, 94%)
CMYK	cmyk(57.5%, 26.3%, 0%, 5.9%)
CIE-LAB	lab(69.86, -5.27, -38.47)
CIE-LCH	lch(69.86, 38.83, 262.20°)
OKLab	oklab(73.74% -0.0488 -0.108)
OKLCH	oklch(73.74% 0.119 245.7)
XYZ	xyz(36.9241, 40.5570, 88.3036)
Luminance	0.4056 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66B1F0 #F0A566

analogous

#66F0EA #66B1F0 #666CF0

triadic

#66B1F0 #F066B1 #B1F066

tetradic

#66B1F0 #EA66F0 #F0A566 #6CF066

square

#66B1F0 #EA66F0 #F0A566 #6CF066

split-complementary

#66B1F0 #F0666C #F0EA66

monochromatic

#1476C8 #2E95EB #66B1F0 #9ECDF5 #D5EAFB

Accessibility & contrast

On white

2.30

#66B1F0 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.11

#66B1F0 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66B1F0

9.11:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66B1F0	#FFFFFF	#000000	##000000
##66B1F0	1.00	2.30	9.11	9.11
#FFFFFF	2.30	1.00	21.00	21.00
#000000	9.11	21.00	1.00	1.00
##000000	9.11	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#96B2F3

Deuteranopia (green-blind)

#83A5EF

Tritanopia (blue-blind)

#00C0C7

Achromatopsia (no color)

#ABABAB

Design tokens & code

CSS

--color: #66b1f0;
/* rgb */ color: rgb(102, 177, 240);
/* oklch */ color: oklch(73.7% 0.119 245.7);

Tailwind

colors: {
  custom: {
    50: '#9cc8f5',
    500: '#66b1f0',
    950: '#000000',
  },
}

SCSS

$custom: #66b1f0;
$custom-light: #9cc8f5;
$custom-dark: #000000;

JSON

{
  "hex": "#66b1f0",
  "rgb": {
    "r": 102,
    "g": 177,
    "b": 240
  },
  "hsl": {
    "h": 207.391,
    "s": 82.143,
    "l": 67.059
  },
  "oklch": {
    "l": 0.73744,
    "c": 0.11853,
    "h": 245.7
  },
  "luminance": 0.4056
}

Semantic roles & 50–950 ramp

primary

#66B1F0

secondary

#EFD7C3

accent

#6907DF

background

#FAFCFE

surface

#F4F8FD

border

#CED1D5

text

#0F1317

muted

#7F8285

Preview Lab

Preview with #66B1F0

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

Preview Lab → · Contrast checker → · Palette generator →