Underground is pale, warm-toned shade of warm red. It is better contrasting with white. This color combines beautifully with cool cyan, cool magenta or cool green
| Inverse Color | #99a5ae |
| Complementary Color | #515d66 |
| Color Shade: | warm red (25.71° hue) |
| Color Temperature: | warm |
| Lightness: | 35.88% (better contrasting with white) |
If you're looking for a similar warm red shade, there are some better alternatives to Underground Color. The Mocha Latte color for instance is a lighter and a bit more vibrant option, however this color has a mid red bias. Consider a lighter and more saturated alternative called Ruskie (#866c5e) for more energetic effect. Try Unpredictable Hue as it also a bit more faded and calm.
#515d66 is the best complementary color to Underground. Cool cyan shades generally complement the warm red hues best as they are found on the opposite end of the color wheel. The most popular #665a51 complementary color is Shuttle Gray, as it offers maximum contrast and grab the viewer's attention.
The analogous palette of cool red, warm red, and warm yellow colors offers a soft combination of similar warm shades. The analogous colors of Pine Cone are #665152 and #666451. Thus found on the left and right of #665a51 on the color wheel with a 30° gap. Consider matching Zambezi and Kokoda colors as they work well with Underground.
The split-complementary Underground palette consists of #515266 and #516664 colors. They can be found 30° apart on either side of the complementary color (#515d66). Try Trout and Corduroy colors in combination with #665a51, as they are not as contrasting as a complementary color, hence, giving more hue variety to make your design stand out.
The triadic palette of #665a51 offers a combination of warm blue and cool green shades and equally high contrast between the three of them. Find triadic colors at the 120° distance from the Underground. Thus Scarpa Flow and Nandor giving maximum hue separation to use all three together.
The square color palette of Underground contains three additional colors. Thus, complementary Shuttle Gray, Finlandia, and Salt Box split by 90° on the color wheel. #665a51 square combo is a palette of warm red, warm green, cool cyan and cool magenta shades that work together well.
The tetradic palette is a bit more complex than the square and has more of a rectangle shape. Underground tetradic combo consists of cool cyan complementary color (#515d66) and two others. The Nandor is positioned 120° clockwise from the primary color and Don Juan – 120° from the complementary Shuttle Gray. This palette is not recommended to use as-is. Try to tweak the saturation and brightness of #51665a and #66515d.
In a RGB color space, hex #665a51 is made of 37% red, 33% green and 30% blue. In a HSL mode Underground has a hue angle of 25.71°, a saturation of 11.48% and a lightness of 35.88%. In a CMYK space (used in printing only), hex #665a51 is made of 0% cyan, 4.71% magenta, 8.24% yellow and 60% black ink.
| HEX | #665a51 |
| RGB Decimal | rgb(102,90,81) |
| RGB Percentage | 37%, 33%, 30% |
| CMYK | 0, 4.71, 8.24, 60 |
| HSL | hsl(25.71,11.48%,35.88%) |
| HSV (or HSB) | hsv(25.71,20.59%,40%) |
| CIE-LAB | lab(39.124,3.2265,6.9749) |
| XYZ | xyz(10.6209,10.7312,9.2961) |