Web safe colours are really a thing of the past in web design. A distant memory of when computers were limited to 256 colours in the nineties.
Today we can use virtually any colour that can be mixed with percentages of RGB (red, green and blue) and pretty much guarantee it will display on any web browser.
However, it is sometimes helpful to give clients a basic colour chart to pick from as it can be difficult to describe a colour without seeing it. What we describe as Royal Blue might be a million miles away from what the customer actually requires.
Use the colour chart shown to pick a web safe colour, and If necessary we can then tweek it in any direction.