#66B3F5#66B3F5

#66B3F5 is a light, vivid cyan. Relative luminance 0.417; OKLCH L 74.4% C 0.123 H 246.3°. Best body text is #000000 at 9.33:1 contrast (WCAG AA passes).

Color values

HEX	#66B3F5
RGB	rgb(102, 179, 245)
HSL	hsl(208, 88%, 68%)
HSV	hsv(208, 58%, 96%)
CMYK	cmyk(58.4%, 26.9%, 0%, 3.9%)
CIE-LAB	lab(70.63, -4.83, -39.99)
CIE-LCH	lch(70.63, 40.28, 263.12°)
OKLab	oklab(74.42% -0.0494 -0.1124)
OKLCH	oklch(74.42% 0.123 246.3)
XYZ	xyz(38.0750, 41.6541, 92.4020)
Luminance	0.4166 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66B3F5 #F5A866

analogous

#66F5EF #66B3F5 #666BF5

triadic

#66B3F5 #F566B3 #B3F566

tetradic

#66B3F5 #EF66F5 #F5A866 #6BF566

square

#66B3F5 #EF66F5 #F5A866 #6BF566

split-complementary

#66B3F5 #F5666B #F5EF66

monochromatic

#0E78D3 #2D96F1 #66B3F5 #9FD0F9 #D9ECFD

Accessibility & contrast

On white

2.25

#66B3F5 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.33

#66B3F5 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66B3F5

9.33:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66B3F5	#FFFFFF	#000000	##000000
##66B3F5	1.00	2.25	9.33	9.33
#FFFFFF	2.25	1.00	21.00	21.00
#000000	9.33	21.00	1.00	1.00
##000000	9.33	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#97B5F8

Deuteranopia (green-blind)

#83A6F4

Tritanopia (blue-blind)

#00C3CA

Achromatopsia (no color)

#ADADAD

Design tokens & code

CSS

--color: #66b3f5;
/* rgb */ color: rgb(102, 179, 245);
/* oklch */ color: oklch(74.4% 0.123 246.3);

Tailwind

colors: {
  custom: {
    50: '#9cc9f8',
    500: '#66b3f5',
    950: '#000000',
  },
}

SCSS

$custom: #66b3f5;
$custom-light: #9cc9f8;
$custom-dark: #000000;

JSON

{
  "hex": "#66b3f5",
  "rgb": {
    "r": 102,
    "g": 179,
    "b": 245
  },
  "hsl": {
    "h": 207.692,
    "s": 87.73,
    "l": 68.039
  },
  "oklch": {
    "l": 0.74418,
    "c": 0.12277,
    "h": 246.3
  },
  "luminance": 0.41658
}

Semantic roles & 50–950 ramp

primary

#66B3F5

secondary

#F1DAC6

accent

#6A01E4

background

#FAFCFF

surface

#F4F8FF

border

#CED1D7

text

#0F1317

muted

#7F8285

Preview Lab

Preview with #66B3F5

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

Preview Lab → · Contrast checker → · Palette generator →