Is there a simple way to display a color bitmap in grayscale with just HTML/CSS?
It doesn\'t need to be IE-compatible (and I imagine it won\'t be) -- if
Try this jquery plugin. Although, this is not a pure HTML and CSS solution, but it is a lazy way to achieve what you want. You can customize your greyscale to best suit your usage. Use it as follow:
$("#myImageID").tancolor();
There's an interactive demo. You can play around with it.
Check out the documentation on the usage, it is pretty simple. docs