#668D81 colour

#668D81 is a greyish green cyan close to CSS gray: RGB 102, 141, 129, HSL 162, 16%, 48%. Black text passes AA (5.69:1). Tints, shades and colour harmonies.

#668D81

Nearest CSS name: gray #808080 (not an exact match)
Described as: a greyish green cyan
Red, green, blue: 102, 141, 129
Web safe: No
Luminance: 0.2346 (WCAG relative luminance, 0 is black, 1 is white)

Colour codes

HEX	`#668d81`
RGB	`rgb(102, 141, 129)`
RGB (percent)	`rgb(40% 55.3% 50.6%)`
HSL	`hsl(161.5, 16%, 47.6%)`
HSV / HSB	`hsv(161.5, 27.7%, 55.3%)`
HWB	`hwb(161.5 40% 44.7%)`
CMYK (naive)	`cmyk(28%, 0%, 9%, 45%)`
CIELAB (D50)	`lab(55.46% -16.1 1.83)`
OKLCH	`oklch(61.08% 0.047 173.69)`
Decimal	`6720897`

CMYK here is the plain formula with no colour profile, so treat it as a starting point; a printer's profile gives the real ink values. CIELAB uses a D50 white point, as CSS lab() does. HSV is not a CSS function, so it is shown for design apps only.

Contrast with white and black text

White text, 3.69:1The quick brown fox jumps over the lazy dog.

Black text, 5.69:1The quick brown fox jumps over the lazy dog.

Text	Ratio	AA normal (4.5)	AA large (3)	AAA normal (7)	AAA large (4.5)
White	3.69:1	Fail	Pass	Fail	Fail
Black	5.69:1	Pass	Pass	Fail	Pass

Black text is the better choice on #668D81 (5.69:1). Ratios use the WCAG 2.2 formula; large text means at least 24px, or 18.66px bold. Check another pair.

Tints and shades

Mixed with white, then with black, in ten even steps (straight sRGB mixing, as most design tools do).

9%#74978c 18%#82a298 27%#90aca3 36%#9eb6af 45%#acc1ba 55%#b9cbc6 64%#c7d6d1 73%#d5e0dd 82%#e3eae8 91%#f1f5f4

9%#5d8075 18%#53736a 27%#4a675e 36%#415a52 45%#384d46 55%#2e403b 64%#25332f 73%#1c2623 82%#131a17 91%#090d0c

Colour harmonies

Hue turned around the HSL colour wheel, saturation and lightness kept.

Complementary

The hue opposite on the colour wheel (180°).

#668d81 #8d6672

Analogous

Neighbours 30° either side.

#668d6e #668d81 #66868d

Triadic

Three hues 120° apart.

#668d81 #81668d #8d8166

Split complementary

The two hues either side of the complement (150° and 210°).

#668d81 #8d6686 #8d6e66

Tetradic (square)

Four hues 90° apart.

#668d81 #6e668d #8d6672 #868d66

How it looks with colour blindness

Normal vision#668d81 Protanopia#8a8880 Deuteranopia#838382 Tritanopia#5c8e89 Achromatopsia#858585

Simulated with the Machado, Oliveira and Fernandes (2009) matrices at full severity, applied in linear RGB; achromatopsia shows the colour's luminance as grey. Milder forms (protanomaly, deuteranomaly) are far more common and shift colours less. Never use colour as the only way to carry meaning.

CSS

Text colour	`color: #668d81;`
Background	`background-color: #668d81;`
Border	`border: 1px solid #668d81;`
Half transparent	`background-color: rgb(102 141 129 / 50%);`
Custom property	`--colour-main: #668d81;`
Gradient to a darker shade	`background: linear-gradient(135deg, #668d81, #3d554d);`
Gradient from a lighter tint	`background: linear-gradient(180deg, #a3bbb3, #668d81);`
Text on this colour	`background-color: #668d81; color: #000;`

Similar named colours

Distance is measured in OKLab, scaled by 100; under about 2 is hard to tell apart side by side.

Convert #668D81 to other formats · Build a palette from it · Check contrast · All named colours

Colour names from CSS Color Module Level 4. Palette values from the Tailwind CSS v3 default palette (MIT licence) and the Material Design 2014 colour palette as published in Material Design Lite (Apache License 2.0). All other values are calculated from the hex code.