#66BBEF#66BBEF

#66BBEF is a light, moderate cyan. Relative luminance 0.446; OKLCH L 75.9% C 0.112 H 237.6°. Best body text is #000000 at 9.92:1 contrast (WCAG AA passes).

Color values

HEX	#66BBEF
RGB	rgb(102, 187, 239)
HSL	hsl(203, 81%, 67%)
HSV	hsv(203, 57%, 94%)
CMYK	cmyk(57.3%, 21.8%, 0%, 6.3%)
CIE-LAB	lab(72.62, -11.01, -33.64)
CIE-LCH	lch(72.62, 35.40, 251.87°)
OKLab	oklab(75.91% -0.0598 -0.0941)
OKLCH	oklch(75.91% 0.112 237.6)
XYZ	xyz(38.8240, 44.5939, 88.2061)
Luminance	0.4460 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66BBEF #EF9A66

analogous

#66EFDF #66BBEF #6677EF

triadic

#66BBEF #EF66BB #BBEF66

tetradic

#66BBEF #DF66EF #EF9A66 #77EF66

square

#66BBEF #DF66EF #EF9A66 #77EF66

split-complementary

#66BBEF #EF6677 #EFDF66

monochromatic

#1583C6 #2FA2E9 #66BBEF #9DD4F5 #D5ECFB

Accessibility & contrast

On white

2.12

#66BBEF on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.92

#66BBEF on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66BBEF

9.92:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66BBEF	#FFFFFF	#000000	##000000
##66BBEF	1.00	2.12	9.92	9.92
#FFFFFF	2.12	1.00	21.00	21.00
#000000	9.92	21.00	1.00	1.00
##000000	9.92	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#A3BAF1

Deuteranopia (green-blind)

#90ACEE

Tritanopia (blue-blind)

#00C8CC

Achromatopsia (no color)

#B2B2B2

Design tokens & code

CSS

--color: #66bbef;
/* rgb */ color: rgb(102, 187, 239);
/* oklch */ color: oklch(75.9% 0.112 237.6);

Tailwind

colors: {
  custom: {
    50: '#9ccff4',
    500: '#66bbef',
    950: '#000000',
  },
}

SCSS

$custom: #66bbef;
$custom-light: #9ccff4;
$custom-dark: #000000;

JSON

{
  "hex": "#66bbef",
  "rgb": {
    "r": 102,
    "g": 187,
    "b": 239
  },
  "hsl": {
    "h": 202.774,
    "s": 81.065,
    "l": 66.863
  },
  "oklch": {
    "l": 0.75913,
    "c": 0.1115,
    "h": 237.6
  },
  "luminance": 0.44597
}

Semantic roles & 50–950 ramp

primary

#66BBEF

secondary

#EED3C2

accent

#5908DD

background

#FAFCFE

surface

#F4F9FD

border

#CED2D5

text

#0F1317

muted

#7F8285

Preview Lab

Preview with #66BBEF

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

Preview Lab → · Contrast checker → · Palette generator →