#21303e - Imperial Primer color

A deep, cool slate-blue with green undertones that reads almost charcoal in low light. It feels composed and sophisticated—evoking stormy coastal waters or aged steel—making it excellent for backgrounds, navigation bars, and refined branding. The color balances modernity with subtle warmth, pairing beautifully with brass, soft peach, or warm ivory for contrast. It imparts calm, stability, and understated elegance, suitable for professional interfaces, editorial layouts, and interiors seeking a moody, grounded atmosphere.

#21303e color RGB value is 33, 48, 62, and the CMYK value is 0.468, 0.226, 0.00, 0.757. Alternative names for that color are: imperial primer, black, darkslategray, elephant, indigo, darkslategrey.

Open Color Palette Builder Open Color Wheel

Color Conversion

Name	Values	CSS
RGB(0-255)	33, 48, 62	rgb(33, 48, 62)
CMYK	0.468, 0.226, 0.00, 0.757	-
sRGB	0.129, 0.188, 0.243	rgb(12.9%, 18.8%, 24.3%)
Adobe® 98 RGB compatible	0.166, 0.202, 0.250	color(a98-rgb, 0.166, 0.202, 0.25)
HCT	247, 16.2, 19.2	color(--hct, 247, 11.2%, 19.2%)
HSL	209, 30.5, 18.6	hsl(209, 30.5%, 18.6%)
HSV	209, 46.8, 24.3	color(--hsv, 209, 46.8%, 24.3%)
HWB	209, 12.9, 75.7	hwb(209, 12.9%, 75.7%)
Lab	19.0, -3.11, -11.0	lab(19%, -3.11, -11)
P3	0.142, 0.187, 0.238	color(display-p3, 0.142, 0.187, 0.238)
XYZ D50	0.0249, 0.0275, 0.0375	color(xyz-d50, 0.025, 0.027, 0.037)