The Danish national flag is called Dannebrog. According to legend Dannebrog fell from the sky in Estonia on 15 June 1219. Dannebrog means "Danish cloth" or "well made material". Dannebrog is red with a white cross. The cross design appeared first on the Danish flag and has since been taken on by the other Nordic countries.

download .JPG version of Denmark's flag

download .EPS version of Denmark's flag

The official red colour on Dannebrog is pantone 186C. It can be translated fairly accurately to the digital colours:
R:210  G:16  B:52
C:11  M:100 Y:85  K:2

The proportional measurements in the length are: 12, 4 og 21
The proportional measurements in the height are: 12, 4 and 12