#66AAF0#66AAF0

#66AAF0 is a light, vivid cyan. Relative luminance 0.379; OKLCH L 72.2% C 0.124 H 250.5°. Best body text is #000000 at 8.57:1 contrast (WCAG AA passes).

Color values

HEX	#66AAF0
RGB	rgb(102, 170, 240)
HSL	hsl(210, 82%, 67%)
HSV	hsv(210, 58%, 94%)
CMYK	cmyk(57.5%, 29.2%, 0%, 5.9%)
CIE-LAB	lab(67.92, -1.38, -41.51)
CIE-LCH	lch(67.92, 41.53, 268.10°)
OKLab	oklab(72.21% -0.0413 -0.1168)
OKLCH	oklch(72.21% 0.124 250.5)
XYZ	xyz(35.5767, 37.8624, 87.8545)
Luminance	0.3787 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66AAF0 #F0AC66

analogous

#66EFF0 #66AAF0 #6766F0

triadic

#66AAF0 #F066AA #AAF066

tetradic

#66AAF0 #F066EF #F0AC66 #66F067

square

#66AAF0 #F066EF #F0AC66 #66F067

split-complementary

#66AAF0 #F06766 #EFF066

monochromatic

#146CC8 #2E8BEB #66AAF0 #9EC9F5 #D5E8FB

Accessibility & contrast

On white

2.45

#66AAF0 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

8.57

#66AAF0 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66AAF0

8.57:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66AAF0	#FFFFFF	#000000	##000000
##66AAF0	1.00	2.45	8.57	8.57
#FFFFFF	2.45	1.00	21.00	21.00
#000000	8.57	21.00	1.00	1.00
##000000	8.57	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#8DADF3

Deuteranopia (green-blind)

#7A9FEF

Tritanopia (blue-blind)

#00BAC3

Achromatopsia (no color)

#A5A5A5

Design tokens & code

CSS

--color: #66aaf0;
/* rgb */ color: rgb(102, 170, 240);
/* oklch */ color: oklch(72.2% 0.124 250.5);

Tailwind

colors: {
  custom: {
    50: '#9bc3f5',
    500: '#66aaf0',
    950: '#000000',
  },
}

SCSS

$custom: #66aaf0;
$custom-light: #9bc3f5;
$custom-dark: #000000;

JSON

{
  "hex": "#66aaf0",
  "rgb": {
    "r": 102,
    "g": 170,
    "b": 240
  },
  "hsl": {
    "h": 210.435,
    "s": 82.143,
    "l": 67.059
  },
  "oklch": {
    "l": 0.72213,
    "c": 0.12393,
    "h": 250.5
  },
  "luminance": 0.37866
}

Semantic roles & 50–950 ramp

primary

#66AAF0

secondary

#EFD9C3

accent

#7407DF

background

#FAFBFE

surface

#F4F7FD

border

#CED0D5

text

#0F1217

muted

#7F8185

Preview Lab

Preview with #66AAF0

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

Preview Lab → · Contrast checker → · Palette generator →