#66BCF3#66BCF3

#66BCF3 is a light, moderate cyan. Relative luminance 0.453; OKLCH L 76.3% C 0.115 H 238.8°. Best body text is #000000 at 10.05:1 contrast (WCAG AA passes).

Color values

HEX	#66BCF3
RGB	rgb(102, 188, 243)
HSL	hsl(203, 85%, 68%)
HSV	hsv(203, 58%, 95%)
CMYK	cmyk(58%, 22.6%, 0%, 4.7%)
CIE-LAB	lab(73.06, -10.34, -35.13)
CIE-LCH	lch(73.06, 36.62, 253.60°)
OKLab	oklab(76.31% -0.0596 -0.0984)
OKLCH	oklch(76.31% 0.115 238.8)
XYZ	xyz(39.6343, 45.2586, 91.4237)
Luminance	0.4526 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66BCF3 #F39D66

analogous

#66F3E3 #66BCF3 #6676F3

triadic

#66BCF3 #F366BC #BCF366

tetradic

#66BCF3 #E366F3 #F39D66 #76F366

square

#66BCF3 #E366F3 #F39D66 #76F366

split-complementary

#66BCF3 #F36676 #F3E366

monochromatic

#1084CE #2DA3EF #66BCF3 #9FD5F7 #D7EEFC

Accessibility & contrast

On white

2.09

#66BCF3 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

10.05

#66BCF3 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66BCF3

10.05:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66BCF3	#FFFFFF	#000000	##000000
##66BCF3	1.00	2.09	10.05	10.05
#FFFFFF	2.09	1.00	21.00	21.00
#000000	10.05	21.00	1.00	1.00
##000000	10.05	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#A3BBF6

Deuteranopia (green-blind)

#90ADF2

Tritanopia (blue-blind)

#00CACF

Achromatopsia (no color)

#B3B3B3

Design tokens & code

CSS

--color: #66bcf3;
/* rgb */ color: rgb(102, 188, 243);
/* oklch */ color: oklch(76.3% 0.115 238.8);

Tailwind

colors: {
  custom: {
    50: '#9cd0f7',
    500: '#66bcf3',
    950: '#000000',
  },
}

SCSS

$custom: #66bcf3;
$custom-light: #9cd0f7;
$custom-dark: #000000;

JSON

{
  "hex": "#66bcf3",
  "rgb": {
    "r": 102,
    "g": 188,
    "b": 243
  },
  "hsl": {
    "h": 203.404,
    "s": 85.455,
    "l": 67.647
  },
  "oklch": {
    "l": 0.76312,
    "c": 0.11498,
    "h": 238.8
  },
  "luminance": 0.45262
}

Semantic roles & 50–950 ramp

primary

#66BCF3

secondary

#F0D6C5

accent

#5A04E2

background

#FAFCFF

surface

#F4F9FE

border

#CED2D6

text

#0F1317

muted

#7F8285

Preview Lab

Preview with #66BCF3

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

Preview Lab → · Contrast checker → · Palette generator →