#66B4E7#66B4E7

#66B4E7 is a light, moderate cyan. Relative luminance 0.412; OKLCH L 74.0% C 0.107 H 239.1°. Best body text is #000000 at 9.25:1 contrast (WCAG AA passes).

Color values

HEX	#66B4E7
RGB	rgb(102, 180, 231)
HSL	hsl(204, 73%, 65%)
HSV	hsv(204, 56%, 91%)
CMYK	cmyk(55.8%, 22.1%, 0%, 9.4%)
CIE-LAB	lab(70.34, -9.66, -32.83)
CIE-LCH	lch(70.34, 34.22, 253.61°)
OKLab	oklab(74% -0.0549 -0.0918)
OKLCH	oklch(74% 0.107 239.1)
XYZ	xyz(36.2192, 41.2336, 81.6360)
Luminance	0.4124 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66B4E7 #E79966

analogous

#66E7D9 #66B4E7 #6673E7

triadic

#66B4E7 #E766B4 #B4E766

tetradic

#66B4E7 #D966E7 #E79966 #73E766

square

#66B4E7 #D966E7 #E79966 #73E766

split-complementary

#66B4E7 #E76673 #E7D966

monochromatic

#1D79B6 #319ADF #66B4E7 #9BCEEF #D0E8F8

Accessibility & contrast

On white

2.27

#66B4E7 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.25

#66B4E7 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66B4E7

9.25:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66B4E7	#FFFFFF	#000000	##000000
##66B4E7	1.00	2.27	9.25	9.25
#FFFFFF	2.27	1.00	21.00	21.00
#000000	9.25	21.00	1.00	1.00
##000000	9.25	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#9DB3E9

Deuteranopia (green-blind)

#8BA6E6

Tritanopia (blue-blind)

#00C1C5

Achromatopsia (no color)

#ACACAC

Design tokens & code

CSS

--color: #66b4e7;
/* rgb */ color: rgb(102, 180, 231);
/* oklch */ color: oklch(74.0% 0.107 239.1);

Tailwind

colors: {
  custom: {
    50: '#9bcaee',
    500: '#66b4e7',
    950: '#000000',
  },
}

SCSS

$custom: #66b4e7;
$custom-light: #9bcaee;
$custom-dark: #000000;

JSON

{
  "hex": "#66b4e7",
  "rgb": {
    "r": 102,
    "g": 180,
    "b": 231
  },
  "hsl": {
    "h": 203.721,
    "s": 72.881,
    "l": 65.294
  },
  "oklch": {
    "l": 0.73999,
    "c": 0.10697,
    "h": 239.1
  },
  "luminance": 0.41237
}

Semantic roles & 50–950 ramp

primary

#66B4E7

secondary

#EAD0BF

accent

#5E11D5

background

#FAFCFE

surface

#F3F8FD

border

#CDD1D5

text

#0F1316

muted

#7F8284

Preview Lab

Preview with #66B4E7

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

Preview Lab → · Contrast checker → · Palette generator →