#66BCF7#66BCF7

#66BCF7 is a light, moderate cyan. Relative luminance 0.455; OKLCH L 76.5% C 0.119 H 240.7°. Best body text is #000000 at 10.10:1 contrast (WCAG AA passes).

Color values

HEX	#66BCF7
RGB	rgb(102, 188, 247)
HSL	hsl(204, 90%, 68%)
HSV	hsv(204, 59%, 97%)
CMYK	cmyk(58.7%, 23.9%, 0%, 3.1%)
CIE-LAB	lab(73.22, -9.12, -37.04)
CIE-LCH	lch(73.22, 38.14, 256.17°)
OKLab	oklab(76.49% -0.0583 -0.1038)
OKLCH	oklch(76.49% 0.119 240.7)
XYZ	xyz(40.2449, 45.5029, 94.6397)
Luminance	0.4551 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66BCF7 #F7A166

analogous

#66F7EA #66BCF7 #6673F7

triadic

#66BCF7 #F766BC #BCF766

tetradic

#66BCF7 #EA66F7 #F7A166 #73F766

square

#66BCF7 #EA66F7 #F7A166 #73F766

split-complementary

#66BCF7 #F76673 #F7EA66

monochromatic

#0B84D7 #2CA3F4 #66BCF7 #A0D5FA #DAEFFD

Accessibility & contrast

On white

2.08

#66BCF7 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

10.10

#66BCF7 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66BCF7

10.10:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66BCF7	#FFFFFF	#000000	##000000
##66BCF7	1.00	2.08	10.10	10.10
#FFFFFF	2.08	1.00	21.00	21.00
#000000	10.10	21.00	1.00	1.00
##000000	10.10	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#A2BCFA

Deuteranopia (green-blind)

#8EADF6

Tritanopia (blue-blind)

#00CBD0

Achromatopsia (no color)

#B4B4B4

Design tokens & code

CSS

--color: #66bcf7;
/* rgb */ color: rgb(102, 188, 247);
/* oklch */ color: oklch(76.5% 0.119 240.7);

Tailwind

colors: {
  custom: {
    50: '#9dd0fa',
    500: '#66bcf7',
    950: '#000000',
  },
}

SCSS

$custom: #66bcf7;
$custom-light: #9dd0fa;
$custom-dark: #000000;

JSON

{
  "hex": "#66bcf7",
  "rgb": {
    "r": 102,
    "g": 188,
    "b": 247
  },
  "hsl": {
    "h": 204.414,
    "s": 90.062,
    "l": 68.431
  },
  "oklch": {
    "l": 0.76492,
    "c": 0.11907,
    "h": 240.7
  },
  "luminance": 0.45507
}

Semantic roles & 50–950 ramp

primary

#66BCF7

secondary

#F2D8C7

accent

#5D00E6

background

#FAFCFF

surface

#F4F9FF

border

#CED2D7

text

#0F1317

muted

#7F8285

Preview Lab

Preview with #66BCF7

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

Preview Lab → · Contrast checker → · Palette generator →