Thermally sensitive recording medium

A thermally sensitive recording medium, comprising a substrate and a thermally sensitive color developing layer carried on said substrate, said layer comprising a colorless or pale colored dye precursor and a color developer, wherein the dye precursor comprises at least one orange color developing leuco dye whose maximum absorption wave length is from 460 to 550 nm and at least one black color developing leuco dye whose maximum absorption wave length is from 420 to 480 nm and 550 to 640 nm.