#515153 - Celluloid color

A muted, medium-dark charcoal gray with a cool, slightly blue-leaning cast that reads as calm and restrained. It evokes slate or worn graphite, offering a subtle smokiness rather than intense black, and carries a modern, understated elegance. Works well as a neutral backdrop or accent, pairing beautifully with warm metals, pale pastels, and crisp whites to create contrast without harshness. It feels steady and sophisticated, suitable for interiors, branding, and digital interfaces seeking a quiet, contemporary mood.

#515153 color RGB value is 81, 81, 83, and the CMYK value is 0.0241, 0.0241, 0.00, 0.675. Alternative names for that color are: celluloid, gray, dimgray, abbey, outer space, green.

Open Color Palette Builder Open Color Wheel

Color Conversion

Name	Values	CSS
RGB(0-255)	81, 81, 83	rgb(81, 81, 83)
CMYK	0.0241, 0.0241, 0.00, 0.675	-
sRGB	0.318, 0.318, 0.325	rgb(31.8%, 31.8%, 32.5%)
Adobe® 98 RGB compatible	0.321, 0.321, 0.328	color(a98-rgb, 0.321, 0.321, 0.328)
HCT	258, 2.69, 34.5	color(--hct, 258, 1.85%, 34.5%)
HSL	240, 1.22, 32.2	hsl(240, 1.22%, 32.2%)
HSV	240, 2.41, 32.5	color(--hsv, 240, 2.41%, 32.5%)
HWB	240, 31.8, 67.5	hwb(240, 31.8%, 67.5%)
Lab	34.5, 0.325, -1.18	lab(34.5%, 0.325, -1.18)
P3	0.318, 0.318, 0.325	color(display-p3, 0.318, 0.318, 0.325)
XYZ D50	0.0799, 0.0825, 0.0709	color(xyz-d50, 0.08, 0.083, 0.071)