#66ACE4#66ACE4

#66ACE4 is a light, moderate cyan. Relative luminance 0.379; OKLCH L 72.1% C 0.108 H 244.3°. Best body text is #000000 at 8.59:1 contrast (WCAG AA passes).

Color values

HEX	#66ACE4
RGB	rgb(102, 172, 228)
HSL	hsl(207, 70%, 65%)
HSV	hsv(207, 55%, 89%)
CMYK	cmyk(55.3%, 24.6%, 0%, 10.6%)
CIE-LAB	lab(67.97, -6.19, -34.87)
CIE-LCH	lch(67.97, 35.41, 259.93°)
OKLab	oklab(72.08% -0.0471 -0.0977)
OKLCH	oklch(72.08% 0.108 244.3)
XYZ	xyz(34.2305, 37.9283, 78.9008)
Luminance	0.3793 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66ACE4 #E49E66

analogous

#66E4DD #66ACE4 #666DE4

triadic

#66ACE4 #E466AC #ACE466

tetradic

#66ACE4 #DD66E4 #E49E66 #6DE466

square

#66ACE4 #DD66E4 #E49E66 #6DE466

split-complementary

#66ACE4 #E4666D #E4DD66

monochromatic

#1F70B0 #3290DB #66ACE4 #9AC8ED #CEE4F6

Accessibility & contrast

On white

2.45

#66ACE4 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

8.59

#66ACE4 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66ACE4

8.59:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66ACE4	#FFFFFF	#000000	##000000
##66ACE4	1.00	2.45	8.59	8.59
#FFFFFF	2.45	1.00	21.00	21.00
#000000	8.59	21.00	1.00	1.00
##000000	8.59	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#94ADE7

Deuteranopia (green-blind)

#83A0E3

Tritanopia (blue-blind)

#00BABF

Achromatopsia (no color)

#A6A6A6

Design tokens & code

CSS

--color: #66ace4;
/* rgb */ color: rgb(102, 172, 228);
/* oklch */ color: oklch(72.1% 0.108 244.3);

Tailwind

colors: {
  custom: {
    50: '#9ac4ec',
    500: '#66ace4',
    950: '#000000',
  },
}

SCSS

$custom: #66ace4;
$custom-light: #9ac4ec;
$custom-dark: #000000;

JSON

{
  "hex": "#66ace4",
  "rgb": {
    "r": 102,
    "g": 172,
    "b": 228
  },
  "hsl": {
    "h": 206.667,
    "s": 70,
    "l": 64.706
  },
  "oklch": {
    "l": 0.72083,
    "c": 0.10843,
    "h": 244.3
  },
  "luminance": 0.37931
}

Semantic roles & 50–950 ramp

primary

#66ACE4

secondary

#E9D0BD

accent

#6814D2

background

#F9FCFE

surface

#F2F8FD

border

#CCD1D5

text

#0F1216

muted

#7E8184

Preview Lab

Preview with #66ACE4

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

Preview Lab → · Contrast checker → · Palette generator →