#8a99a3 - Thundercat color

This color reads as a soft, muted slate with cool blue-gray tones and a faint green undertone, evoking sea glass or a rain-smoothed pebble. It feels tranquil and sophisticated, suitable for calming interiors, textiles, and branding that seeks understated elegance. It pairs beautifully with crisp white, warm oak, and aged brass for contrast, or with deeper navies and charcoal for a layered, moody palette. Overall, it’s cool, balanced, and versatile, lending subtle refinement without appearing stark.

#8a99a3 color RGB value is 138, 153, 163, and the CMYK value is 0.153, 0.0613, 0.00, 0.361. Alternative names for that color are: thundercat, gray, lightslategray, regent gray, manatee, violet.

Open Color Palette Builder Open Color Wheel

Color Conversion

Name	Values	CSS
RGB(0-255)	138, 153, 163	rgb(138, 153, 163)
CMYK	0.153, 0.0613, 0.00, 0.361	-
sRGB	0.541, 0.600, 0.639	rgb(54.1%, 60%, 63.9%)
Adobe® 98 RGB compatible	0.554, 0.594, 0.632	color(a98-rgb, 0.554, 0.594, 0.632)
HCT	233, 13.1, 62.4	color(--hct, 233, 9.01%, 62.4%)
HSL	204, 12.0, 59.0	hsl(204, 12%, 59%)
HSV	204, 15.3, 63.9	color(--hsv, 204, 15.3%, 63.9%)
HWB	204, 54.1, 36.1	hwb(204, 54.1%, 36.1%)
Lab	62.3, -3.93, -7.17	lab(62.3%, -3.93, -7.17)
P3	0.552, 0.598, 0.635	color(display-p3, 0.552, 0.598, 0.635)
XYZ D50	0.286, 0.307, 0.296	color(xyz-d50, 0.286, 0.307, 0.296)