#637985 - Tool Blue color

A subdued slate blue-green with a cool, steely undertone. It reads calm and composed, like the surface of a deep coastal tide under overcast skies. Muted and slightly desaturated, it feels professional and grounded—suitable for interfaces, branding, or interiors seeking restrained sophistication. Pairs beautifully with warm woods, soft creams, brass accents, and charcoal for contrast. Conveys stability, quiet confidence, and a modern, slightly industrial elegance without feeling harsh.

#637985 color RGB value is 99, 121, 133, and the CMYK value is 0.256, 0.0902, 0.00, 0.478. Alternative names for that color are: tool blue, gray, slategray, slate gray, manatee, violet, slategrey.

Open Color Palette Builder Open Color Wheel

Color Conversion

Name	Values	CSS
RGB(0-255)	99, 121, 133	rgb(99, 121, 133)
CMYK	0.256, 0.0902, 0.00, 0.478	-
sRGB	0.388, 0.475, 0.522	rgb(38.8%, 47.5%, 52.2%)
Adobe® 98 RGB compatible	0.414, 0.471, 0.515	color(a98-rgb, 0.414, 0.471, 0.515)
HCT	230, 16.9, 49.5	color(--hct, 230, 11.7%, 49.5%)
HSL	201, 14.7, 45.5	hsl(201, 14.7%, 45.5%)
HSV	201, 25.6, 52.2	color(--hsv, 201, 25.6%, 52.2%)
HWB	201, 38.8, 47.8	hwb(201, 38.8%, 47.8%)
Lab	49.4, -6.14, -9.39	lab(49.4%, -6.14, -9.39)
P3	0.405, 0.472, 0.516	color(display-p3, 0.405, 0.472, 0.516)
XYZ D50	0.162, 0.179, 0.188	color(xyz-d50, 0.162, 0.179, 0.188)