#66C4FB#66C4FB

#66C4FB is a light, moderate cyan. Relative luminance 0.493; OKLCH L 78.4% C 0.119 H 236.7°. Best body text is #000000 at 10.85:1 contrast (WCAG AA passes).

Color values

HEX	#66C4FB
RGB	rgb(102, 196, 251)
HSL	hsl(202, 95%, 69%)
HSV	hsv(202, 59%, 98%)
CMYK	cmyk(59.4%, 21.9%, 0%, 1.6%)
CIE-LAB	lab(75.62, -12.18, -35.48)
CIE-LCH	lch(75.62, 37.51, 251.05°)
OKLab	oklab(78.44% -0.0653 -0.0993)
OKLCH	oklch(78.44% 0.119 236.7)
XYZ	xyz(42.6254, 49.2656, 98.5110)
Luminance	0.4927 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66C4FB #FB9D66

analogous

#66FBE8 #66C4FB #667AFB

triadic

#66C4FB #FB66C4 #C4FB66

tetradic

#66C4FB #E866FB #FB9D66 #7AFB66

square

#66C4FB #E866FB #FB9D66 #7AFB66

split-complementary

#66C4FB #FB667A #FBE866

monochromatic

#0690E1 #2AADF9 #66C4FB #A2DBFD #DDF2FE

Accessibility & contrast

On white

1.93

#66C4FB on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

10.85

#66C4FB on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66C4FB

10.85:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66C4FB	#FFFFFF	#000000	##000000
##66C4FB	1.00	1.93	10.85	10.85
#FFFFFF	1.93	1.00	21.00	21.00
#000000	10.85	21.00	1.00	1.00
##000000	10.85	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#AAC3FE

Deuteranopia (green-blind)

#96B4FA

Tritanopia (blue-blind)

#00D2D6

Achromatopsia (no color)

#BABABA

Design tokens & code

CSS

--color: #66c4fb;
/* rgb */ color: rgb(102, 196, 251);
/* oklch */ color: oklch(78.4% 0.119 236.7);

Tailwind

colors: {
  custom: {
    50: '#9dd5fd',
    500: '#66c4fb',
    950: '#000000',
  },
}

SCSS

$custom: #66c4fb;
$custom-light: #9dd5fd;
$custom-dark: #000000;

JSON

{
  "hex": "#66c4fb",
  "rgb": {
    "r": 102,
    "g": 196,
    "b": 251
  },
  "hsl": {
    "h": 202.148,
    "s": 94.904,
    "l": 69.216
  },
  "oklch": {
    "l": 0.78442,
    "c": 0.11888,
    "h": 236.7
  },
  "luminance": 0.4927
}

Semantic roles & 50–950 ramp

primary

#66C4FB

secondary

#F4D9C9

accent

#5500E6

background

#FAFDFF

surface

#F4FAFF

border

#CED3D7

text

#0F1417

muted

#7F8385

Preview Lab

Preview with #66C4FB

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

Preview Lab → · Contrast checker → · Palette generator →