#66B4E4#66B4E4

#66B4E4 is a light, moderate cyan. Relative luminance 0.411; OKLCH L 73.9% C 0.104 H 237.4°. Best body text is #000000 at 9.21:1 contrast (WCAG AA passes).

Color values

HEX	#66B4E4
RGB	rgb(102, 180, 228)
HSL	hsl(203, 70%, 65%)
HSV	hsv(203, 55%, 89%)
CMYK	cmyk(55.3%, 21.1%, 0%, 10.6%)
CIE-LAB	lab(70.22, -10.56, -31.38)
CIE-LCH	lch(70.22, 33.11, 251.41°)
OKLab	oklab(73.87% -0.0559 -0.0876)
OKLCH	oklch(73.87% 0.104 237.4)
XYZ	xyz(35.7991, 41.0656, 79.4236)
Luminance	0.4107 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66B4E4 #E49666

analogous

#66E4D5 #66B4E4 #6675E4

triadic

#66B4E4 #E466B4 #B4E466

tetradic

#66B4E4 #D566E4 #E49666 #75E466

square

#66B4E4 #D566E4 #E49666 #75E466

split-complementary

#66B4E4 #E46675 #E4D566

monochromatic

#1F79B0 #329BDB #66B4E4 #9ACEED #CEE7F6

Accessibility & contrast

On white

2.28

#66B4E4 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.21

#66B4E4 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66B4E4

9.21:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66B4E4	#FFFFFF	#000000	##000000
##66B4E4	1.00	2.28	9.21	9.21
#FFFFFF	2.28	1.00	21.00	21.00
#000000	9.21	21.00	1.00	1.00
##000000	9.21	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#9EB3E6

Deuteranopia (green-blind)

#8DA6E3

Tritanopia (blue-blind)

#00C0C4

Achromatopsia (no color)

#ACACAC

Design tokens & code

CSS

--color: #66b4e4;
/* rgb */ color: rgb(102, 180, 228);
/* oklch */ color: oklch(73.9% 0.104 237.4);

Tailwind

colors: {
  custom: {
    50: '#9acaec',
    500: '#66b4e4',
    950: '#000000',
  },
}

SCSS

$custom: #66b4e4;
$custom-light: #9acaec;
$custom-dark: #000000;

JSON

{
  "hex": "#66b4e4",
  "rgb": {
    "r": 102,
    "g": 180,
    "b": 228
  },
  "hsl": {
    "h": 202.857,
    "s": 70,
    "l": 64.706
  },
  "oklch": {
    "l": 0.73867,
    "c": 0.10395,
    "h": 237.4
  },
  "luminance": 0.41069
}

Semantic roles & 50–950 ramp

primary

#66B4E4

secondary

#E9CEBD

accent

#5C14D2

background

#FAFCFE

surface

#F3F8FD

border

#CDD1D5

text

#0F1316

muted

#7F8284

Preview Lab

Preview with #66B4E4

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

Preview Lab → · Contrast checker → · Palette generator →