#657abb - Ultramarine Blue color

A soft, cool periwinkle—muted medium blue with a subtle violet tint and gentle gray undertone. It feels calm and refined, reminiscent of twilight skies or slate accented by lavender. This balanced, slightly desaturated blue is versatile for website backgrounds, branding, and interiors where a serene but sophisticated mood is desired. Pairs beautifully with warm neutrals like cream and tan, blush pink or ochre for contrast, and metallics such as brass or copper for an elegant accent.

#657abb color RGB value is 101, 122, 187, and the CMYK value is 0.460, 0.348, 0.00, 0.267. Alternative names for that color are: ultramarine blue, gray, steelblue, san marino, indigo, violet.

Open Color Palette Builder Open Color Wheel

Color Conversion

Name	Values	CSS
RGB(0-255)	101, 122, 187	rgb(101, 122, 187)
CMYK	0.460, 0.348, 0.00, 0.267	-
sRGB	0.396, 0.478, 0.733	rgb(39.6%, 47.8%, 73.3%)
Adobe® 98 RGB compatible	0.420, 0.475, 0.719	color(a98-rgb, 0.42, 0.475, 0.719)
HCT	272, 40.6, 52.1	color(--hct, 272, 28%, 52.1%)
HSL	225, 38.7, 56.5	hsl(225, 38.7%, 56.5%)
HSV	225, 46.0, 73.3	color(--hsv, 225, 46%, 73.3%)
HWB	225, 39.6, 26.7	hwb(225, 39.6%, 26.7%)
Lab	51.7, 5.63, -37.2	lab(51.7%, 5.63, -37.2)
P3	0.412, 0.476, 0.714	color(display-p3, 0.412, 0.476, 0.714)
XYZ D50	0.203, 0.199, 0.376	color(xyz-d50, 0.203, 0.199, 0.376)