Computer Science for IGCSE & O level - Data Representation (Section 5 - No. 17)
In HTML color codes, the value 00 in the #RRGGBB format indicates:
Full intensity of that color component.
No intensity of that color component.
50% intensity of that color component.
An invalid color value.
Объяснение
00 indicates a lack of color intensity (0 in decimal).