#66A9FB#66A9FB

#66A9FB is a light, vivid cyan. Relative luminance 0.382; OKLCH L 72.5% C 0.138 H 254.4°. Best body text is #000000 at 8.63:1 contrast (WCAG AA passes).

Color values

HEX	#66A9FB
RGB	rgb(102, 169, 251)
HSL	hsl(213, 95%, 69%)
HSV	hsv(213, 59%, 98%)
CMYK	cmyk(59.4%, 32.7%, 0%, 1.6%)
CIE-LAB	lab(68.14, 2.65, -47.15)
CIE-LCH	lch(68.14, 47.22, 273.22°)
OKLab	oklab(72.55% -0.0372 -0.1333)
OKLCH	oklch(72.55% 0.138 254.4)
XYZ	xyz(37.0738, 38.1624, 96.6604)
Luminance	0.3817 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66A9FB #FBB866

analogous

#66F4FB #66A9FB #6E66FB

triadic

#66A9FB #FB66A9 #A9FB66

tetradic

#66A9FB #FB66F4 #FBB866 #66FB6E

square

#66A9FB #FB66F4 #FBB866 #66FB6E

split-complementary

#66A9FB #FB6E66 #F4FB66

monochromatic

#0668E1 #2A87F9 #66A9FB #A2CBFD #DDECFE

Accessibility & contrast

On white

2.43

#66A9FB on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

8.63

#66A9FB on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66A9FB

8.63:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66A9FB	#FFFFFF	#000000	##000000
##66A9FB	1.00	2.43	8.63	8.63
#FFFFFF	2.43	1.00	21.00	21.00
#000000	8.63	21.00	1.00	1.00
##000000	8.63	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#86AEFE

Deuteranopia (green-blind)

#73A0F9

Tritanopia (blue-blind)

#00BCC7

Achromatopsia (no color)

#A6A6A6

Design tokens & code

CSS

--color: #66a9fb;
/* rgb */ color: rgb(102, 169, 251);
/* oklch */ color: oklch(72.5% 0.138 254.4);

Tailwind

colors: {
  custom: {
    50: '#9dc2fd',
    500: '#66a9fb',
    950: '#000000',
  },
}

SCSS

$custom: #66a9fb;
$custom-light: #9dc2fd;
$custom-dark: #000000;

JSON

{
  "hex": "#66a9fb",
  "rgb": {
    "r": 102,
    "g": 169,
    "b": 251
  },
  "hsl": {
    "h": 213.02,
    "s": 94.904,
    "l": 69.216
  },
  "oklch": {
    "l": 0.72549,
    "c": 0.13836,
    "h": 254.4
  },
  "luminance": 0.38166
}

Semantic roles & 50–950 ramp

primary

#66A9FB

secondary

#F4E1C9

accent

#7E00E6

background

#FAFBFF

surface

#F4F7FF

border

#CED0D7

text

#0F1217

muted

#7F8185

Preview Lab

Preview with #66A9FB

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

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