#66A4F0#66A4F0

#66A4F0 is a light, vivid cyan. Relative luminance 0.357; OKLCH L 70.9% C 0.129 H 254.4°. Best body text is #000000 at 8.13:1 contrast (WCAG AA passes).

Color values

HEX	#66A4F0
RGB	rgb(102, 164, 240)
HSL	hsl(213, 82%, 67%)
HSV	hsv(213, 58%, 94%)
CMYK	cmyk(57.5%, 31.7%, 0%, 5.9%)
CIE-LAB	lab(66.26, 2.01, -44.10)
CIE-LCH	lch(66.26, 44.15, 272.61°)
OKLab	oklab(70.91% -0.0349 -0.1244)
OKLCH	oklch(70.91% 0.129 254.4)
XYZ	xyz(34.4775, 35.6640, 87.4881)
Luminance	0.3567 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66A4F0 #F0B266

analogous

#66E9F0 #66A4F0 #6D66F0

triadic

#66A4F0 #F066A4 #A4F066

tetradic

#66A4F0 #F066E9 #F0B266 #66F06D

square

#66A4F0 #F066E9 #F0B266 #66F06D

split-complementary

#66A4F0 #F06D66 #E9F066

monochromatic

#1465C8 #2E83EB #66A4F0 #9EC5F5 #D5E6FB

Accessibility & contrast

On white

2.58

#66A4F0 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

8.13

#66A4F0 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66A4F0

8.13:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66A4F0	#FFFFFF	#000000	##000000
##66A4F0	1.00	2.58	8.13	8.13
#FFFFFF	2.58	1.00	21.00	21.00
#000000	8.13	21.00	1.00	1.00
##000000	8.13	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#84A8F3

Deuteranopia (green-blind)

#729BEE

Tritanopia (blue-blind)

#00B5BF

Achromatopsia (no color)

#A1A1A1

Design tokens & code

CSS

--color: #66a4f0;
/* rgb */ color: rgb(102, 164, 240);
/* oklch */ color: oklch(70.9% 0.129 254.4);

Tailwind

colors: {
  custom: {
    50: '#9bbef5',
    500: '#66a4f0',
    950: '#000000',
  },
}

SCSS

$custom: #66a4f0;
$custom-light: #9bbef5;
$custom-dark: #000000;

JSON

{
  "hex": "#66a4f0",
  "rgb": {
    "r": 102,
    "g": 164,
    "b": 240
  },
  "hsl": {
    "h": 213.043,
    "s": 82.143,
    "l": 67.059
  },
  "oklch": {
    "l": 0.70914,
    "c": 0.12923,
    "h": 254.4
  },
  "luminance": 0.35667
}

Semantic roles & 50–950 ramp

primary

#66A4F0

secondary

#EFDBC3

accent

#7E07DF

background

#FAFBFF

surface

#F4F6FE

border

#CED0D6

text

#0F1217

muted

#7F8185

Preview Lab

Preview with #66A4F0

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

Preview Lab → · Contrast checker → · Palette generator →