#66A4E9#66A4E9

#66A4E9 is a light, vivid cyan. Relative luminance 0.353; OKLCH L 70.6% C 0.120 H 252.2°. Best body text is #000000 at 8.05:1 contrast (WCAG AA passes).

Color values

HEX	#66A4E9
RGB	rgb(102, 164, 233)
HSL	hsl(212, 75%, 66%)
HSV	hsv(212, 56%, 91%)
CMYK	cmyk(56.2%, 29.6%, 0%, 8.6%)
CIE-LAB	lab(65.95, -0.18, -40.76)
CIE-LCH	lch(65.95, 40.76, 269.74°)
OKLab	oklab(70.56% -0.0368 -0.1147)
OKLCH	oklch(70.56% 0.12 252.2)
XYZ	xyz(33.4577, 35.2560, 82.1169)
Luminance	0.3526 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66A4E9 #E9AB66

analogous

#66E5E9 #66A4E9 #6966E9

triadic

#66A4E9 #E966A4 #A4E966

tetradic

#66A4E9 #E966E5 #E9AB66 #66E969

square

#66A4E9 #E966E5 #E9AB66 #66E969

split-complementary

#66A4E9 #E96966 #E5E966

monochromatic

#1B66BA #3084E1 #66A4E9 #9CC4F1 #D1E4F8

Accessibility & contrast

On white

2.61

#66A4E9 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

8.05

#66A4E9 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66A4E9

8.05:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66A4E9	#FFFFFF	#000000	##000000
##66A4E9	1.00	2.61	8.05	8.05
#FFFFFF	2.61	1.00	21.00	21.00
#000000	8.05	21.00	1.00	1.00
##000000	8.05	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#87A7EC

Deuteranopia (green-blind)

#769BE8

Tritanopia (blue-blind)

#00B4BC

Achromatopsia (no color)

#A0A0A0

Design tokens & code

CSS

--color: #66a4e9;
/* rgb */ color: rgb(102, 164, 233);
/* oklch */ color: oklch(70.6% 0.120 252.2);

Tailwind

colors: {
  custom: {
    50: '#9bbef0',
    500: '#66a4e9',
    950: '#000000',
  },
}

SCSS

$custom: #66a4e9;
$custom-light: #9bbef0;
$custom-dark: #000000;

JSON

{
  "hex": "#66a4e9",
  "rgb": {
    "r": 102,
    "g": 164,
    "b": 233
  },
  "hsl": {
    "h": 211.603,
    "s": 74.857,
    "l": 65.686
  },
  "oklch": {
    "l": 0.70564,
    "c": 0.12049,
    "h": 252.2
  },
  "luminance": 0.35259
}

Semantic roles & 50–950 ramp

primary

#66A4E9

secondary

#EBD7C0

accent

#780ED7

background

#FAFBFE

surface

#F3F6FD

border

#CDD0D5

text

#0F1216

muted

#7F8184

Preview Lab

Preview with #66A4E9

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

Preview Lab → · Contrast checker → · Palette generator →