#0011dd - Nightfall in Suburbia color

A vivid, saturated cobalt-blue leaning toward electric royal blue with a subtle indigo undertone. It reads as cool and intense, offering high contrast against white or pale neutrals. The hue feels energetic and modern—suitable for tech branding, signage, or accents that demand attention—while still retaining a refined, authoritative presence. Pair it with warm metallics like brass or gold for luxury, soft grays for restraint, or coral/apricot for vibrant complementary contrast.

#0011dd color RGB value is 0, 17, 221, and the CMYK value is 1.00, 0.923, 0.00, 0.133. Alternative names for that color are: nightfall in suburbia, blue, mediumblue, dark blue, purple heart.

Open Color Palette Builder Open Color Wheel

Color Conversion

Name	Values	CSS
RGB(0-255)	0, 17, 221	rgb(0, 17, 221)
CMYK	1.00, 0.923, 0.00, 0.133	-
sRGB	0.00, 0.0667, 0.867	rgb(0%, 6.67%, 86.7%)
Adobe® 98 RGB compatible	0.0535, 0.0947, 0.847	color(a98-rgb, 0.053, 0.095, 0.847)
HCT	282, 79.1, 28.4	color(--hct, 282, 54.5%, 28.4%)
HSL	235, 100, 43.3	hsl(235, 100%, 43.3%)
HSV	235, 100, 86.7	color(--hsv, 235, 100%, 86.7%)
HWB	235, 0.00, 13.3	hwb(235, 0%, 13.3%)
Lab	26.1, 57.7, -98.5	lab(26.1%, 57.7, -98.5)
P3	0.0129, 0.0650, 0.832	color(display-p3, 0.013, 0.065, 0.832)
XYZ D50	0.106, 0.0478, 0.517	color(xyz-d50, 0.106, 0.048, 0.517)