#66A5EA#66A5EA

#66A5EA is a light, vivid cyan. Relative luminance 0.357; OKLCH L 70.8% C 0.121 H 251.9°. Best body text is #000000 at 8.14:1 contrast (WCAG AA passes).

Color values

HEX	#66A5EA
RGB	rgb(102, 165, 234)
HSL	hsl(211, 76%, 66%)
HSV	hsv(211, 56%, 92%)
CMYK	cmyk(56.4%, 29.5%, 0%, 8.2%)
CIE-LAB	lab(66.27, -0.44, -40.81)
CIE-LCH	lch(66.27, 40.81, 269.39°)
OKLab	oklab(70.83% -0.0376 -0.1149)
OKLCH	oklch(70.83% 0.121 251.9)
XYZ	xyz(33.7806, 35.6727, 82.9313)
Luminance	0.3568 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66A5EA #EAAB66

analogous

#66E7EA #66A5EA #6966EA

triadic

#66A5EA #EA66A5 #A5EA66

tetradic

#66A5EA #EA66E7 #EAAB66 #66EA69

square

#66A5EA #EA66E7 #EAAB66 #66EA69

split-complementary

#66A5EA #EA6966 #E7EA66

monochromatic

#1A67BC #3085E3 #66A5EA #9CC5F1 #D2E4F9

Accessibility & contrast

On white

2.58

#66A5EA on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

8.14

#66A5EA on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66A5EA

8.14:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66A5EA	#FFFFFF	#000000	##000000
##66A5EA	1.00	2.58	8.14	8.14
#FFFFFF	2.58	1.00	21.00	21.00
#000000	8.14	21.00	1.00	1.00
##000000	8.14	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#88A8ED

Deuteranopia (green-blind)

#779BE9

Tritanopia (blue-blind)

#00B5BD

Achromatopsia (no color)

#A1A1A1

Design tokens & code

CSS

--color: #66a5ea;
/* rgb */ color: rgb(102, 165, 234);
/* oklch */ color: oklch(70.8% 0.121 251.9);

Tailwind

colors: {
  custom: {
    50: '#9bbff1',
    500: '#66a5ea',
    950: '#000000',
  },
}

SCSS

$custom: #66a5ea;
$custom-light: #9bbff1;
$custom-dark: #000000;

JSON

{
  "hex": "#66a5ea",
  "rgb": {
    "r": 102,
    "g": 165,
    "b": 234
  },
  "hsl": {
    "h": 211.364,
    "s": 75.862,
    "l": 65.882
  },
  "oklch": {
    "l": 0.70831,
    "c": 0.12086,
    "h": 251.9
  },
  "luminance": 0.35676
}

Semantic roles & 50–950 ramp

primary

#66A5EA

secondary

#ECD7C0

accent

#770DD8

background

#FAFBFE

surface

#F3F7FD

border

#CDD0D5

text

#0F1216

muted

#7F8184

Preview Lab

Preview with #66A5EA

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

Preview Lab → · Contrast checker → · Palette generator →