#66B8F0#66B8F0

#66B8F0 is a light, moderate cyan. Relative luminance 0.434; OKLCH L 75.3% C 0.114 H 240.4°. Best body text is #000000 at 9.68:1 contrast (WCAG AA passes).

Color values

HEX	#66B8F0
RGB	rgb(102, 184, 240)
HSL	hsl(204, 82%, 67%)
HSV	hsv(204, 58%, 94%)
CMYK	cmyk(57.5%, 23.3%, 0%, 5.9%)
CIE-LAB	lab(71.82, -9.09, -35.43)
CIE-LCH	lch(71.82, 36.58, 255.60°)
OKLab	oklab(75.29% -0.0563 -0.0992)
OKLCH	oklch(75.29% 0.114 240.4)
XYZ	xyz(38.3423, 43.3935, 88.7764)
Luminance	0.4340 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66B8F0 #F09E66

analogous

#66F0E3 #66B8F0 #6673F0

triadic

#66B8F0 #F066B8 #B8F066

tetradic

#66B8F0 #E366F0 #F09E66 #73F066

square

#66B8F0 #E366F0 #F09E66 #73F066

split-complementary

#66B8F0 #F06673 #F0E366

monochromatic

#147FC8 #2E9EEB #66B8F0 #9ED2F5 #D5ECFB

Accessibility & contrast

On white

2.17

#66B8F0 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.68

#66B8F0 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66B8F0

9.68:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66B8F0	#FFFFFF	#000000	##000000
##66B8F0	1.00	2.17	9.68	9.68
#FFFFFF	2.17	1.00	21.00	21.00
#000000	9.68	21.00	1.00	1.00
##000000	9.68	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#9FB8F3

Deuteranopia (green-blind)

#8CAAEF

Tritanopia (blue-blind)

#00C6CB

Achromatopsia (no color)

#B0B0B0

Design tokens & code

CSS

--color: #66b8f0;
/* rgb */ color: rgb(102, 184, 240);
/* oklch */ color: oklch(75.3% 0.114 240.4);

Tailwind

colors: {
  custom: {
    50: '#9ccdf5',
    500: '#66b8f0',
    950: '#000000',
  },
}

SCSS

$custom: #66b8f0;
$custom-light: #9ccdf5;
$custom-dark: #000000;

JSON

{
  "hex": "#66b8f0",
  "rgb": {
    "r": 102,
    "g": 184,
    "b": 240
  },
  "hsl": {
    "h": 204.348,
    "s": 82.143,
    "l": 67.059
  },
  "oklch": {
    "l": 0.7529,
    "c": 0.11408,
    "h": 240.4
  },
  "luminance": 0.43397
}

Semantic roles & 50–950 ramp

primary

#66B8F0

secondary

#EFD5C3

accent

#5E07DF

background

#FAFCFE

surface

#F4F8FD

border

#CED1D5

text

#0F1317

muted

#7F8285

Preview Lab

Preview with #66B8F0

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

Preview Lab → · Contrast checker → · Palette generator →