#66B8F5#66B8F5

#66B8F5 is a light, moderate cyan. Relative luminance 0.437; OKLCH L 75.5% C 0.119 H 242.7°. Best body text is #000000 at 9.74:1 contrast (WCAG AA passes).

Color values

HEX	#66B8F5
RGB	rgb(102, 184, 245)
HSL	hsl(206, 88%, 68%)
HSV	hsv(206, 58%, 96%)
CMYK	cmyk(58.4%, 24.9%, 0%, 3.9%)
CIE-LAB	lab(72.02, -7.57, -37.82)
CIE-LCH	lch(72.02, 38.57, 258.69°)
OKLab	oklab(75.52% -0.0547 -0.1061)
OKLCH	oklch(75.52% 0.119 242.7)
XYZ	xyz(39.0953, 43.6947, 92.7421)
Luminance	0.4370 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66B8F5 #F5A366

analogous

#66F5EA #66B8F5 #6671F5

triadic

#66B8F5 #F566B8 #B8F566

tetradic

#66B8F5 #EA66F5 #F5A366 #71F566

square

#66B8F5 #EA66F5 #F5A366 #71F566

split-complementary

#66B8F5 #F56671 #F5EA66

monochromatic

#0E7FD3 #2D9DF1 #66B8F5 #9FD3F9 #D9EDFD

Accessibility & contrast

On white

2.16

#66B8F5 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.74

#66B8F5 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66B8F5

9.74:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66B8F5	#FFFFFF	#000000	##000000
##66B8F5	1.00	2.16	9.74	9.74
#FFFFFF	2.16	1.00	21.00	21.00
#000000	9.74	21.00	1.00	1.00
##000000	9.74	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#9DB9F8

Deuteranopia (green-blind)

#8AAAF4

Tritanopia (blue-blind)

#00C7CD

Achromatopsia (no color)

#B1B1B1

Design tokens & code

CSS

--color: #66b8f5;
/* rgb */ color: rgb(102, 184, 245);
/* oklch */ color: oklch(75.5% 0.119 242.7);

Tailwind

colors: {
  custom: {
    50: '#9ccdf8',
    500: '#66b8f5',
    950: '#000000',
  },
}

SCSS

$custom: #66b8f5;
$custom-light: #9ccdf8;
$custom-dark: #000000;

JSON

{
  "hex": "#66b8f5",
  "rgb": {
    "r": 102,
    "g": 184,
    "b": 245
  },
  "hsl": {
    "h": 205.594,
    "s": 87.73,
    "l": 68.039
  },
  "oklch": {
    "l": 0.75517,
    "c": 0.11937,
    "h": 242.7
  },
  "luminance": 0.43698
}

Semantic roles & 50–950 ramp

primary

#66B8F5

secondary

#F1D8C6

accent

#6201E4

background

#FAFCFF

surface

#F4F8FF

border

#CED1D7

text

#0F1317

muted

#7F8285

Preview Lab

Preview with #66B8F5

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

Preview Lab → · Contrast checker → · Palette generator →