Color lookup tables (LUTs) that are friendly to color-blind viewers and that are also easily converted to linear gradients for black and white printing in some journals can be useful. To this end we have modified the new "Viridis" LUT so that it has a more linear conversion to gray:
We have also created a close-to-gray silver LUT that contrasts well with both gray and color images and converts well to non-color printing.
