#66A4E4#66A4E4

#66A4E4 is a light, moderate cyan. Relative luminance 0.350; OKLCH L 70.3% C 0.114 H 250.5°. Best body text is #000000 at 8.00:1 contrast (WCAG AA passes).

Color values

HEX	#66A4E4
RGB	rgb(102, 164, 228)
HSL	hsl(210, 70%, 65%)
HSV	hsv(210, 55%, 89%)
CMYK	cmyk(55.3%, 28.1%, 0%, 10.6%)
CIE-LAB	lab(65.73, -1.73, -38.35)
CIE-LCH	lch(65.73, 38.39, 267.41°)
OKLab	oklab(70.32% -0.0382 -0.1078)
OKLCH	oklch(70.32% 0.114 250.5)
XYZ	xyz(32.7536, 34.9744, 78.4084)
Luminance	0.3498 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66A4E4 #E4A666

analogous

#66E3E4 #66A4E4 #6766E4

triadic

#66A4E4 #E466A4 #A4E466

tetradic

#66A4E4 #E466E3 #E4A666 #66E467

square

#66A4E4 #E466E3 #E4A666 #66E467

split-complementary

#66A4E4 #E46766 #E3E466

monochromatic

#1F67B0 #3285DB #66A4E4 #9AC3ED #CEE2F6

Accessibility & contrast

On white

2.63

#66A4E4 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

8.00

#66A4E4 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66A4E4

8.00:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66A4E4	#FFFFFF	#000000	##000000
##66A4E4	1.00	2.63	8.00	8.00
#FFFFFF	2.63	1.00	21.00	21.00
#000000	8.00	21.00	1.00	1.00
##000000	8.00	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#89A7E7

Deuteranopia (green-blind)

#799AE3

Tritanopia (blue-blind)

#00B3BA

Achromatopsia (no color)

#A0A0A0

Design tokens & code

CSS

--color: #66a4e4;
/* rgb */ color: rgb(102, 164, 228);
/* oklch */ color: oklch(70.3% 0.114 250.5);

Tailwind

colors: {
  custom: {
    50: '#9abeec',
    500: '#66a4e4',
    950: '#000000',
  },
}

SCSS

$custom: #66a4e4;
$custom-light: #9abeec;
$custom-dark: #000000;

JSON

{
  "hex": "#66a4e4",
  "rgb": {
    "r": 102,
    "g": 164,
    "b": 228
  },
  "hsl": {
    "h": 210.476,
    "s": 70,
    "l": 64.706
  },
  "oklch": {
    "l": 0.7032,
    "c": 0.11436,
    "h": 250.5
  },
  "luminance": 0.34977
}

Semantic roles & 50–950 ramp

primary

#66A4E4

secondary

#E9D3BD

accent

#7414D2

background

#F9FBFE

surface

#F2F6FD

border

#CCD0D5

text

#0F1216

muted

#7E8184

Preview Lab

Preview with #66A4E4

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

Preview Lab → · Contrast checker → · Palette generator →