#66B3F3#66B3F3

#66B3F3 is a light, vivid cyan. Relative luminance 0.415; OKLCH L 74.3% C 0.121 H 245.5°. Best body text is #000000 at 9.31:1 contrast (WCAG AA passes).

Color values

HEX	#66B3F3
RGB	rgb(102, 179, 243)
HSL	hsl(207, 85%, 68%)
HSV	hsv(207, 58%, 95%)
CMYK	cmyk(58%, 26.3%, 0%, 4.7%)
CIE-LAB	lab(70.55, -5.45, -39.03)
CIE-LCH	lch(70.55, 39.41, 262.06°)
OKLab	oklab(74.32% -0.05 -0.1096)
OKLCH	oklch(74.32% 0.121 245.5)
XYZ	xyz(37.7713, 41.5326, 90.8027)
Luminance	0.4154 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66B3F3 #F3A666

analogous

#66F3ED #66B3F3 #666CF3

triadic

#66B3F3 #F366B3 #B3F366

tetradic

#66B3F3 #ED66F3 #F3A666 #6CF366

square

#66B3F3 #ED66F3 #F3A666 #6CF366

split-complementary

#66B3F3 #F3666C #F3ED66

monochromatic

#1078CE #2D97EF #66B3F3 #9FCFF7 #D7EBFC

Accessibility & contrast

On white

2.26

#66B3F3 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.31

#66B3F3 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66B3F3

9.31:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66B3F3	#FFFFFF	#000000	##000000
##66B3F3	1.00	2.26	9.31	9.31
#FFFFFF	2.26	1.00	21.00	21.00
#000000	9.31	21.00	1.00	1.00
##000000	9.31	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#97B4F6

Deuteranopia (green-blind)

#84A6F2

Tritanopia (blue-blind)

#00C2C9

Achromatopsia (no color)

#ADADAD

Design tokens & code

CSS

--color: #66b3f3;
/* rgb */ color: rgb(102, 179, 243);
/* oklch */ color: oklch(74.3% 0.121 245.5);

Tailwind

colors: {
  custom: {
    50: '#9cc9f7',
    500: '#66b3f3',
    950: '#000000',
  },
}

SCSS

$custom: #66b3f3;
$custom-light: #9cc9f7;
$custom-dark: #000000;

JSON

{
  "hex": "#66b3f3",
  "rgb": {
    "r": 102,
    "g": 179,
    "b": 243
  },
  "hsl": {
    "h": 207.234,
    "s": 85.455,
    "l": 67.647
  },
  "oklch": {
    "l": 0.74324,
    "c": 0.12051,
    "h": 245.5
  },
  "luminance": 0.41536
}

Semantic roles & 50–950 ramp

primary

#66B3F3

secondary

#F0D8C5

accent

#6804E2

background

#FAFCFF

surface

#F4F8FE

border

#CED1D6

text

#0F1317

muted

#7F8285

Preview Lab

Preview with #66B3F3

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

Preview Lab → · Contrast checker → · Palette generator →