#66B3E7#66B3E7

#66B3E7 is a light, moderate cyan. Relative luminance 0.408; OKLCH L 73.8% C 0.107 H 240.0°. Best body text is #000000 at 9.17:1 contrast (WCAG AA passes).

Color values

HEX	#66B3E7
RGB	rgb(102, 179, 231)
HSL	hsl(204, 73%, 65%)
HSV	hsv(204, 56%, 91%)
CMYK	cmyk(55.8%, 22.5%, 0%, 9.4%)
CIE-LAB	lab(70.06, -9.11, -33.27)
CIE-LCH	lch(70.06, 34.49, 254.68°)
OKLab	oklab(73.78% -0.0538 -0.093)
OKLCH	oklch(73.78% 0.107 240)
XYZ	xyz(36.0181, 40.8313, 81.5690)
Luminance	0.4083 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66B3E7 #E79A66

analogous

#66E7DA #66B3E7 #6672E7

triadic

#66B3E7 #E766B3 #B3E766

tetradic

#66B3E7 #DA66E7 #E79A66 #72E766

square

#66B3E7 #DA66E7 #E79A66 #72E766

split-complementary

#66B3E7 #E76672 #E7DA66

monochromatic

#1D78B6 #3199DF #66B3E7 #9BCDEF #D0E8F8

Accessibility & contrast

On white

2.29

#66B3E7 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.17

#66B3E7 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66B3E7

9.17:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66B3E7	#FFFFFF	#000000	##000000
##66B3E7	1.00	2.29	9.17	9.17
#FFFFFF	2.29	1.00	21.00	21.00
#000000	9.17	21.00	1.00	1.00
##000000	9.17	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#9CB3E9

Deuteranopia (green-blind)

#8AA5E6

Tritanopia (blue-blind)

#00C0C4

Achromatopsia (no color)

#ABABAB

Design tokens & code

CSS

--color: #66b3e7;
/* rgb */ color: rgb(102, 179, 231);
/* oklch */ color: oklch(73.8% 0.107 240.0);

Tailwind

colors: {
  custom: {
    50: '#9bc9ee',
    500: '#66b3e7',
    950: '#000000',
  },
}

SCSS

$custom: #66b3e7;
$custom-light: #9bc9ee;
$custom-dark: #000000;

JSON

{
  "hex": "#66b3e7",
  "rgb": {
    "r": 102,
    "g": 179,
    "b": 231
  },
  "hsl": {
    "h": 204.186,
    "s": 72.881,
    "l": 65.294
  },
  "oklch": {
    "l": 0.73776,
    "c": 0.10749,
    "h": 240
  },
  "luminance": 0.40835
}

Semantic roles & 50–950 ramp

primary

#66B3E7

secondary

#EAD0BF

accent

#6011D5

background

#FAFCFE

surface

#F3F8FD

border

#CDD1D5

text

#0F1316

muted

#7F8284

Preview Lab

Preview with #66B3E7

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

Preview Lab → · Contrast checker → · Palette generator →