Dear Hans,
After updating to the current version (mtx-context | current version: 2013.11.01 12:20), I run ConTeXt again. But I still don't have the color output.
make sure you have input in triplets (no precomposed characters)
What do you mean "input in triplets (no precomposed characters)"? We type the first consonant, second vowel, and third consonant in order, then computer show one character for these input.
- make sure you have the right fonts - check if there is an hanbatanglvt.lfg file (loaded)
Yes, there is an hanbatanglvt.lfg file. ConTeXt/tex/texmf-context/tex/context/fonts/hanbatanglvt.lfg But the installed font's name is "HANBatang-LVT.ttf". So I changed the font name in your file from "hanbatanglvt" to "HANBatang-LVT", also I copied the above lfg file as "HANBatang-LVT.lfg" in the same folder. Is it OK to use another Korean font? Thank you. Best regards, Dalyoung