#66A4EB#66A4EB

#66A4EB is a light, vivid cyan. Relative luminance 0.354; OKLCH L 70.7% C 0.123 H 252.9°. Best body text is #000000 at 8.07:1 contrast (WCAG AA passes).

Color values

HEX	#66A4EB
RGB	rgb(102, 164, 235)
HSL	hsl(212, 77%, 66%)
HSV	hsv(212, 57%, 92%)
CMYK	cmyk(56.6%, 30.2%, 0%, 7.8%)
CIE-LAB	lab(66.04, 0.44, -41.72)
CIE-LCH	lch(66.04, 41.72, 270.61°)
OKLab	oklab(70.66% -0.0362 -0.1175)
OKLCH	oklch(70.66% 0.123 252.9)
XYZ	xyz(33.7450, 35.3710, 83.6301)
Luminance	0.3537 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66A4EB #EBAD66

analogous

#66E7EB #66A4EB #6A66EB

triadic

#66A4EB #EB66A4 #A4EB66

tetradic

#66A4EB #EB66E7 #EBAD66 #66EB6A

square

#66A4EB #EB66E7 #EBAD66 #66EB6A

split-complementary

#66A4EB #EB6A66 #E7EB66

monochromatic

#1966BE #3084E4 #66A4EB #9CC4F2 #D2E4F9

Accessibility & contrast

On white

2.60

#66A4EB on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

8.07

#66A4EB on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66A4EB

8.07:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66A4EB	#FFFFFF	#000000	##000000
##66A4EB	1.00	2.60	8.07	8.07
#FFFFFF	2.60	1.00	21.00	21.00
#000000	8.07	21.00	1.00	1.00
##000000	8.07	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#87A8EE

Deuteranopia (green-blind)

#759BEA

Tritanopia (blue-blind)

#00B4BD

Achromatopsia (no color)

#A0A0A0

Design tokens & code

CSS

--color: #66a4eb;
/* rgb */ color: rgb(102, 164, 235);
/* oklch */ color: oklch(70.7% 0.123 252.9);

Tailwind

colors: {
  custom: {
    50: '#9bbef1',
    500: '#66a4eb',
    950: '#000000',
  },
}

SCSS

$custom: #66a4eb;
$custom-light: #9bbef1;
$custom-dark: #000000;

JSON

{
  "hex": "#66a4eb",
  "rgb": {
    "r": 102,
    "g": 164,
    "b": 235
  },
  "hsl": {
    "h": 212.03,
    "s": 76.879,
    "l": 66.078
  },
  "oklch": {
    "l": 0.70663,
    "c": 0.12297,
    "h": 252.9
  },
  "luminance": 0.35374
}

Semantic roles & 50–950 ramp

primary

#66A4EB

secondary

#ECD8C1

accent

#7A0CD9

background

#FAFBFE

surface

#F3F6FD

border

#CDD0D5

text

#0F1217

muted

#7F8185

Preview Lab

Preview with #66A4EB

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

Preview Lab → · Contrast checker → · Palette generator →