#646b77 - Noctis color

A muted steel-blue gray with cool undertones, this mid-tone neutral evokes industrial calm and overcast skies. It reads as sophisticated and restrained, balancing blue’s clarity with gray’s softened neutrality. Works well as a background or base in minimalist interfaces, corporate branding, and masculine interiors, and pairs nicely with warm accents like copper or ochre, or with crisp white and deeper navy for contrast. Its subdued character supports both modern and vintage palettes.

#646b77 color RGB value is 100, 107, 119, and the CMYK value is 0.160, 0.101, 0.00, 0.533. Alternative names for that color are: noctis, gray, dimgray, shuttle gray, outer space, violet.

Open Color Palette Builder Open Color Wheel

Color Conversion

Name	Values	CSS
RGB(0-255)	100, 107, 119	rgb(100, 107, 119)
CMYK	0.160, 0.101, 0.00, 0.533	-
sRGB	0.392, 0.420, 0.467	rgb(39.2%, 42%, 46.7%)
Adobe® 98 RGB compatible	0.400, 0.418, 0.462	color(a98-rgb, 0.4, 0.418, 0.462)
HCT	257, 11.5, 45.0	color(--hct, 257, 7.93%, 45%)
HSL	218, 8.68, 42.9	hsl(218, 8.68%, 42.9%)
HSV	218, 16.0, 46.7	color(--hsv, 218, 16%, 46.7%)
HWB	218, 39.2, 53.3	hwb(218, 39.2%, 53.3%)
Lab	44.9, -0.735, -7.68	lab(44.9%, -0.735, -7.68)
P3	0.397, 0.419, 0.462	color(display-p3, 0.397, 0.419, 0.462)
XYZ D50	0.139, 0.145, 0.148	color(xyz-d50, 0.139, 0.145, 0.148)