#66A5F4#66A5F4

#66A5F4 is a light, vivid cyan. Relative luminance 0.363; OKLCH L 71.3% C 0.133 H 254.8°. Best body text is #000000 at 8.25:1 contrast (WCAG AA passes).

Color values

HEX	#66A5F4
RGB	rgb(102, 165, 244)
HSL	hsl(213, 87%, 68%)
HSV	hsv(213, 58%, 96%)
CMYK	cmyk(58.2%, 32.4%, 0%, 4.3%)
CIE-LAB	lab(66.72, 2.71, -45.57)
CIE-LCH	lch(66.72, 45.65, 273.40°)
OKLab	oklab(71.33% -0.0349 -0.1287)
OKLCH	oklch(71.33% 0.133 254.8)
XYZ	xyz(35.2580, 36.2636, 90.7120)
Luminance	0.3627 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66A5F4 #F4B566

analogous

#66ECF4 #66A5F4 #6E66F4

triadic

#66A5F4 #F466A5 #A5F466

tetradic

#66A5F4 #F466EC #F4B566 #66F46E

square

#66A5F4 #F466EC #F4B566 #66F46E

split-complementary

#66A5F4 #F46E66 #ECF466

monochromatic

#0F65D1 #2D83F0 #66A5F4 #9FC7F8 #D8E8FC

Accessibility & contrast

On white

2.54

#66A5F4 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

8.25

#66A5F4 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66A5F4

8.25:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66A5F4	#FFFFFF	#000000	##000000
##66A5F4	1.00	2.54	8.25	8.25
#FFFFFF	2.54	1.00	21.00	21.00
#000000	8.25	21.00	1.00	1.00
##000000	8.25	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#84AAF7

Deuteranopia (green-blind)

#719CF2

Tritanopia (blue-blind)

#00B7C1

Achromatopsia (no color)

#A2A2A2

Design tokens & code

CSS

--color: #66a5f4;
/* rgb */ color: rgb(102, 165, 244);
/* oklch */ color: oklch(71.3% 0.133 254.8);

Tailwind

colors: {
  custom: {
    50: '#9cbff8',
    500: '#66a5f4',
    950: '#000000',
  },
}

SCSS

$custom: #66a5f4;
$custom-light: #9cbff8;
$custom-dark: #000000;

JSON

{
  "hex": "#66a5f4",
  "rgb": {
    "r": 102,
    "g": 165,
    "b": 244
  },
  "hsl": {
    "h": 213.38,
    "s": 86.585,
    "l": 67.843
  },
  "oklch": {
    "l": 0.71333,
    "c": 0.13333,
    "h": 254.8
  },
  "luminance": 0.36267
}

Semantic roles & 50–950 ramp

primary

#66A5F4

secondary

#F1DDC5

accent

#7F02E3

background

#FAFBFF

surface

#F4F6FF

border

#CED0D7

text

#0F1217

muted

#7F8185

Preview Lab

Preview with #66A5F4

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

Preview Lab → · Contrast checker → · Palette generator →