#66B6EF#66B6EF

#66B6EF is a light, moderate cyan. Relative luminance 0.425; OKLCH L 74.8% C 0.114 H 241.5°. Best body text is #000000 at 9.50:1 contrast (WCAG AA passes).

Color values

HEX	#66B6EF
RGB	rgb(102, 182, 239)
HSL	hsl(205, 81%, 67%)
HSV	hsv(205, 57%, 94%)
CMYK	cmyk(57.3%, 23.8%, 0%, 6.3%)
CIE-LAB	lab(71.22, -8.32, -35.82)
CIE-LCH	lch(71.22, 36.77, 256.93°)
OKLab	oklab(74.8% -0.0545 -0.1003)
OKLCH	oklch(74.8% 0.114 241.5)
XYZ	xyz(37.7817, 42.5092, 87.8587)
Luminance	0.4251 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66B6EF #EF9F66

analogous

#66EFE4 #66B6EF #6672EF

triadic

#66B6EF #EF66B6 #B6EF66

tetradic

#66B6EF #E466EF #EF9F66 #72EF66

square

#66B6EF #E466EF #EF9F66 #72EF66

split-complementary

#66B6EF #EF6672 #EFE466

monochromatic

#157CC6 #2F9CE9 #66B6EF #9DD0F5 #D5EBFB

Accessibility & contrast

On white

2.21

#66B6EF on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.50

#66B6EF on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66B6EF

9.50:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66B6EF	#FFFFFF	#000000	##000000
##66B6EF	1.00	2.21	9.50	9.50
#FFFFFF	2.21	1.00	21.00	21.00
#000000	9.50	21.00	1.00	1.00
##000000	9.50	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#9DB6F2

Deuteranopia (green-blind)

#8AA8EE

Tritanopia (blue-blind)

#00C4C9

Achromatopsia (no color)

#AEAEAE

Design tokens & code

CSS

--color: #66b6ef;
/* rgb */ color: rgb(102, 182, 239);
/* oklch */ color: oklch(74.8% 0.114 241.5);

Tailwind

colors: {
  custom: {
    50: '#9ccbf4',
    500: '#66b6ef',
    950: '#000000',
  },
}

SCSS

$custom: #66b6ef;
$custom-light: #9ccbf4;
$custom-dark: #000000;

JSON

{
  "hex": "#66b6ef",
  "rgb": {
    "r": 102,
    "g": 182,
    "b": 239
  },
  "hsl": {
    "h": 204.964,
    "s": 81.065,
    "l": 66.863
  },
  "oklch": {
    "l": 0.74802,
    "c": 0.11418,
    "h": 241.5
  },
  "luminance": 0.42513
}

Semantic roles & 50–950 ramp

primary

#66B6EF

secondary

#EED5C2

accent

#6108DD

background

#FAFCFE

surface

#F4F8FD

border

#CED1D5

text

#0F1317

muted

#7F8285

Preview Lab

Preview with #66B6EF

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

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