#66B1E2#66B1E2

#66B1E2 is a light, moderate cyan. Relative luminance 0.398; OKLCH L 73.1% C 0.103 H 239.0°. Best body text is #000000 at 8.95:1 contrast (WCAG AA passes).

Color values

HEX	#66B1E2
RGB	rgb(102, 177, 226)
HSL	hsl(204, 68%, 64%)
HSV	hsv(204, 55%, 89%)
CMYK	cmyk(54.9%, 21.7%, 0%, 11.4%)
CIE-LAB	lab(69.30, -9.53, -31.72)
CIE-LCH	lch(69.30, 33.12, 253.27°)
OKLab	oklab(73.11% -0.0533 -0.0886)
OKLCH	oklch(73.11% 0.103 239)
XYZ	xyz(34.9240, 39.7570, 77.7702)
Luminance	0.3976 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66B1E2 #E29766

analogous

#66E2D5 #66B1E2 #6673E2

triadic

#66B1E2 #E266B1 #B1E266

tetradic

#66B1E2 #D566E2 #E29766 #73E266

square

#66B1E2 #D566E2 #E29766 #73E266

split-complementary

#66B1E2 #E26673 #E2D566

monochromatic

#2175AD #3397D8 #66B1E2 #99CBEC #CDE5F6

Accessibility & contrast

On white

2.35

#66B1E2 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

8.95

#66B1E2 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66B1E2

8.95:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66B1E2	#FFFFFF	#000000	##000000
##66B1E2	1.00	2.35	8.95	8.95
#FFFFFF	2.35	1.00	21.00	21.00
#000000	8.95	21.00	1.00	1.00
##000000	8.95	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#9BB0E4

Deuteranopia (green-blind)

#8AA4E1

Tritanopia (blue-blind)

#00BDC1

Achromatopsia (no color)

#A9A9A9

Design tokens & code

CSS

--color: #66b1e2;
/* rgb */ color: rgb(102, 177, 226);
/* oklch */ color: oklch(73.1% 0.103 239.0);

Tailwind

colors: {
  custom: {
    50: '#9ac8eb',
    500: '#66b1e2',
    950: '#000000',
  },
}

SCSS

$custom: #66b1e2;
$custom-light: #9ac8eb;
$custom-dark: #000000;

JSON

{
  "hex": "#66b1e2",
  "rgb": {
    "r": 102,
    "g": 177,
    "b": 226
  },
  "hsl": {
    "h": 203.71,
    "s": 68.132,
    "l": 64.314
  },
  "oklch": {
    "l": 0.73107,
    "c": 0.10339,
    "h": 239
  },
  "luminance": 0.3976
}

Semantic roles & 50–950 ramp

primary

#66B1E2

secondary

#E7CDBC

accent

#5F15D0

background

#F9FCFE

surface

#F2F8FD

border

#CCD1D5

text

#0F1316

muted

#7E8284

Preview Lab

Preview with #66B1E2

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

Preview Lab → · Contrast checker → · Palette generator →