#636ca8 - Twinkle Night color

The color #636ca8 is a medium, desaturated periwinkle—an indigo-leaning blue with soft violet and gray undertones. It reads cool and sophisticated, offering a calm, slightly moody feel that’s versatile for both digital interfaces and interior accents. It pairs beautifully with warm neutrals like beige and blush, mustard or burnt orange for contrast, and crisp whites or pale grays for a cleaner palette. Use it to convey thoughtful elegance, subtle creativity, or modern professionalism.

#636ca8 color RGB value is 99, 108, 168, and the CMYK value is 0.411, 0.357, 0.00, 0.341. Alternative names for that color are: twinkle night, gray, steelblue, kimberly, indigo, violet.

Open Color Palette Builder Open Color Wheel

Color Conversion

Name	Values	CSS
RGB(0-255)	99, 108, 168	rgb(99, 108, 168)
CMYK	0.411, 0.357, 0.00, 0.341	-
sRGB	0.388, 0.424, 0.659	rgb(38.8%, 42.4%, 65.9%)
Adobe® 98 RGB compatible	0.398, 0.422, 0.645	color(a98-rgb, 0.398, 0.422, 0.645)
HCT	279, 37.5, 47.2	color(--hct, 279, 25.8%, 47.2%)
HSL	232, 28.4, 52.4	hsl(232, 28.4%, 52.4%)
HSV	232, 41.1, 65.9	color(--hsv, 232, 41.1%, 65.9%)
HWB	232, 38.8, 34.1	hwb(232, 38.8%, 34.1%)
Lab	46.8, 8.49, -33.7	lab(46.8%, 8.49, -33.7)
P3	0.395, 0.422, 0.642	color(display-p3, 0.395, 0.422, 0.642)
XYZ D50	0.168, 0.159, 0.296	color(xyz-d50, 0.168, 0.159, 0.296)