#66A4EF#66A4EF

#66A4EF is a light, vivid cyan. Relative luminance 0.356; OKLCH L 70.9% C 0.128 H 254.1°. Best body text is #000000 at 8.12:1 contrast (WCAG AA passes).

Color values

HEX	#66A4EF
RGB	rgb(102, 164, 239)
HSL	hsl(213, 81%, 67%)
HSV	hsv(213, 57%, 94%)
CMYK	cmyk(57.3%, 31.4%, 0%, 6.3%)
CIE-LAB	lab(66.22, 1.70, -43.63)
CIE-LCH	lch(66.22, 43.66, 272.23°)
OKLab	oklab(70.86% -0.0351 -0.123)
OKLCH	oklch(70.86% 0.128 254.1)
XYZ	xyz(34.3294, 35.6047, 86.7079)
Luminance	0.3561 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66A4EF #EFB166

analogous

#66E8EF #66A4EF #6D66EF

triadic

#66A4EF #EF66A4 #A4EF66

tetradic

#66A4EF #EF66E8 #EFB166 #66EF6D

square

#66A4EF #EF66E8 #EFB166 #66EF6D

split-complementary

#66A4EF #EF6D66 #E8EF66

monochromatic

#1565C6 #2F83E9 #66A4EF #9DC5F5 #D5E6FB

Accessibility & contrast

On white

2.59

#66A4EF on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

8.12

#66A4EF on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66A4EF

8.12:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66A4EF	#FFFFFF	#000000	##000000
##66A4EF	1.00	2.59	8.12	8.12
#FFFFFF	2.59	1.00	21.00	21.00
#000000	8.12	21.00	1.00	1.00
##000000	8.12	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#85A8F2

Deuteranopia (green-blind)

#739BED

Tritanopia (blue-blind)

#00B5BF

Achromatopsia (no color)

#A1A1A1

Design tokens & code

CSS

--color: #66a4ef;
/* rgb */ color: rgb(102, 164, 239);
/* oklch */ color: oklch(70.9% 0.128 254.1);

Tailwind

colors: {
  custom: {
    50: '#9bbef4',
    500: '#66a4ef',
    950: '#000000',
  },
}

SCSS

$custom: #66a4ef;
$custom-light: #9bbef4;
$custom-dark: #000000;

JSON

{
  "hex": "#66a4ef",
  "rgb": {
    "r": 102,
    "g": 164,
    "b": 239
  },
  "hsl": {
    "h": 212.847,
    "s": 81.065,
    "l": 66.863
  },
  "oklch": {
    "l": 0.70863,
    "c": 0.12797,
    "h": 254.1
  },
  "luminance": 0.35608
}

Semantic roles & 50–950 ramp

primary

#66A4EF

secondary

#EEDAC2

accent

#7D08DD

background

#FAFBFE

surface

#F4F6FD

border

#CED0D5

text

#0F1217

muted

#7F8185

Preview Lab

Preview with #66A4EF

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

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