#3f425a - Amphystine color

Deep, muted slate with cool undertones, this color reads as a subdued indigo-gray—rich but restrained. It evokes a moody, sophisticated atmosphere, pairing well with warm creams, mustard accents, and soft blush for contrast. In design it functions as a strong, elegant background or an anchor tone for typography and accents, offering good readability with bright neutrals and metallic gold. Use it for modern interiors, editorial layouts, or fashion pieces seeking quiet refinement.

#3f425a color RGB value is 63, 66, 90, and the CMYK value is 0.300, 0.267, 0.00, 0.647. Alternative names for that color are: amphystine, gray, darkslategray, gun powder, outer space, indigo, darkslategrey.

Open Color Palette Builder Open Color Wheel

Color Conversion

Name	Values	CSS
RGB(0-255)	63, 66, 90	rgb(63, 66, 90)
CMYK	0.300, 0.267, 0.00, 0.647	-
sRGB	0.247, 0.259, 0.353	rgb(24.7%, 25.9%, 35.3%)
Adobe® 98 RGB compatible	0.259, 0.266, 0.351	color(a98-rgb, 0.259, 0.266, 0.351)
HCT	280, 19.0, 28.6	color(--hct, 280, 13.1%, 28.6%)
HSL	233, 17.6, 30.0	hsl(233, 17.6%, 30%)
HSV	233, 30.0, 35.3	color(--hsv, 233, 30%, 35.3%)
HWB	233, 24.7, 64.7	hwb(233, 24.7%, 64.7%)
Lab	28.5, 3.45, -14.8	lab(28.5%, 3.45, -14.8)
P3	0.249, 0.258, 0.346	color(display-p3, 0.249, 0.258, 0.346)
XYZ D50	0.0573, 0.0563, 0.0790	color(xyz-d50, 0.057, 0.056, 0.079)