#66B4DC#66B4DC

#66B4DC is a light, moderate cyan. Relative luminance 0.406; OKLCH L 73.5% C 0.096 H 232.5°. Best body text is #000000 at 9.13:1 contrast (WCAG AA passes).

Color values

HEX	#66B4DC
RGB	rgb(102, 180, 220)
HSL	hsl(200, 63%, 63%)
HSV	hsv(200, 54%, 86%)
CMYK	cmyk(53.6%, 18.2%, 0%, 13.7%)
CIE-LAB	lab(69.92, -12.93, -27.48)
CIE-LCH	lch(69.92, 30.37, 244.80°)
OKLab	oklab(73.52% -0.0587 -0.0765)
OKLCH	oklch(73.52% 0.096 232.5)
XYZ	xyz(34.7142, 40.6316, 73.7096)
Luminance	0.4063 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66B4DC #DC8E66

analogous

#66DCC9 #66B4DC #6679DC

triadic

#66B4DC #DC66B4 #B4DC66

tetradic

#66B4DC #C966DC #DC8E66 #79DC66

square

#66B4DC #C966DC #DC8E66 #79DC66

split-complementary

#66B4DC #DC6679 #DCC966

monochromatic

#2578A2 #349CD1 #66B4DC #98CCE7 #CAE5F3

Accessibility & contrast

On white

2.30

#66B4DC on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.13

#66B4DC on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66B4DC

9.13:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66B4DC	#FFFFFF	#000000	##000000
##66B4DC	1.00	2.30	9.13	9.13
#FFFFFF	2.30	1.00	21.00	21.00
#000000	9.13	21.00	1.00	1.00
##000000	9.13	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#A1B2DE

Deuteranopia (green-blind)

#90A5DB

Tritanopia (blue-blind)

#0CBFC1

Achromatopsia (no color)

#ABABAB

Design tokens & code

CSS

--color: #66b4dc;
/* rgb */ color: rgb(102, 180, 220);
/* oklch */ color: oklch(73.5% 0.096 232.5);

Tailwind

colors: {
  custom: {
    50: '#9acae7',
    500: '#66b4dc',
    950: '#000000',
  },
}

SCSS

$custom: #66b4dc;
$custom-light: #9acae7;
$custom-dark: #000000;

JSON

{
  "hex": "#66b4dc",
  "rgb": {
    "r": 102,
    "g": 180,
    "b": 220
  },
  "hsl": {
    "h": 200.339,
    "s": 62.766,
    "l": 63.137
  },
  "oklch": {
    "l": 0.73524,
    "c": 0.09642,
    "h": 232.5
  },
  "luminance": 0.40635
}

Semantic roles & 50–950 ramp

primary

#66B4DC

secondary

#E4C8BA

accent

#561BCB

background

#F9FCFE

surface

#F2F8FC

border

#CCD1D5

text

#0F1316

muted

#7E8284

Preview Lab

Preview with #66B4DC

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

Preview Lab → · Contrast checker → · Palette generator →