#637fbb - Watertown color

A calm, mid-tone steel blue tinged with soft violet, this color reads as a sophisticated periwinkle. It feels cool and composed, evoking late-afternoon sky and distant hydrangea petals. Versatile for branding and interfaces, it conveys reliability with a subtle creative edge. Works well as a background or accent when paired with warm creams, muted corals, or brushed brass for contrast. Overall it’s elegant, approachable, and slightly nostalgic without feeling overly bold.

#637fbb color RGB value is 99, 127, 187, and the CMYK value is 0.471, 0.321, 0.00, 0.267. Alternative names for that color are: watertown, gray, steelblue, san marino, indigo, violet.

Open Color Palette Builder Open Color Wheel

Color Conversion

Name	Values	CSS
RGB(0-255)	99, 127, 187	rgb(99, 127, 187)
CMYK	0.471, 0.321, 0.00, 0.267	-
sRGB	0.388, 0.498, 0.733	rgb(38.8%, 49.8%, 73.3%)
Adobe® 98 RGB compatible	0.422, 0.494, 0.720	color(a98-rgb, 0.422, 0.494, 0.72)
HCT	267, 39.2, 53.4	color(--hct, 267, 27%, 53.4%)
HSL	221, 39.3, 56.1	hsl(221, 39.3%, 56.1%)
HSV	221, 47.1, 73.3	color(--hsv, 221, 47.1%, 73.3%)
HWB	221, 38.8, 26.7	hwb(221, 38.8%, 26.7%)
Lab	53.0, 2.29, -35.2	lab(53%, 2.29, -35.2)
P3	0.410, 0.495, 0.715	color(display-p3, 0.41, 0.495, 0.715)
XYZ D50	0.207, 0.210, 0.377	color(xyz-d50, 0.207, 0.21, 0.377)