#66B3EB#66B3EB

#66B3EB is a light, moderate cyan. Relative luminance 0.411; OKLCH L 74.0% C 0.112 H 242.0°. Best body text is #000000 at 9.21:1 contrast (WCAG AA passes).

Color values

HEX	#66B3EB
RGB	rgb(102, 179, 235)
HSL	hsl(205, 77%, 66%)
HSV	hsv(205, 57%, 92%)
CMYK	cmyk(56.6%, 23.8%, 0%, 7.8%)
CIE-LAB	lab(70.22, -7.90, -35.20)
CIE-LCH	lch(70.22, 36.07, 257.35°)
OKLab	oklab(73.96% -0.0525 -0.0986)
OKLCH	oklch(73.96% 0.112 242)
XYZ	xyz(36.5895, 41.0599, 84.5783)
Luminance	0.4106 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66B3EB #EB9E66

analogous

#66EBE0 #66B3EB #6670EB

triadic

#66B3EB #EB66B3 #B3EB66

tetradic

#66B3EB #E066EB #EB9E66 #70EB66

square

#66B3EB #E066EB #EB9E66 #70EB66

split-complementary

#66B3EB #EB6670 #EBE066

monochromatic

#1978BE #3098E4 #66B3EB #9CCEF2 #D2E9F9

Accessibility & contrast

On white

2.28

#66B3EB on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.21

#66B3EB on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66B3EB

9.21:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66B3EB	#FFFFFF	#000000	##000000
##66B3EB	1.00	2.28	9.21	9.21
#FFFFFF	2.28	1.00	21.00	21.00
#000000	9.21	21.00	1.00	1.00
##000000	9.21	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#9AB3EE

Deuteranopia (green-blind)

#88A6EA

Tritanopia (blue-blind)

#00C1C6

Achromatopsia (no color)

#ACACAC

Design tokens & code

CSS

--color: #66b3eb;
/* rgb */ color: rgb(102, 179, 235);
/* oklch */ color: oklch(74.0% 0.112 242.0);

Tailwind

colors: {
  custom: {
    50: '#9bc9f1',
    500: '#66b3eb',
    950: '#000000',
  },
}

SCSS

$custom: #66b3eb;
$custom-light: #9bc9f1;
$custom-dark: #000000;

JSON

{
  "hex": "#66b3eb",
  "rgb": {
    "r": 102,
    "g": 179,
    "b": 235
  },
  "hsl": {
    "h": 205.263,
    "s": 76.879,
    "l": 66.078
  },
  "oklch": {
    "l": 0.73955,
    "c": 0.11171,
    "h": 242
  },
  "luminance": 0.41063
}

Semantic roles & 50–950 ramp

primary

#66B3EB

secondary

#ECD3C1

accent

#630CD9

background

#FAFCFE

surface

#F3F8FD

border

#CDD1D5

text

#0F1316

muted

#7F8284

Preview Lab

Preview with #66B3EB

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

Preview Lab → · Contrast checker → · Palette generator →