diff --git a/csv.nanorc b/csv.nanorc
new file mode 100644
index 0000000..14d7d9c
--- /dev/null
+++ b/csv.nanorc
@@ -0,0 +1,16 @@
+# Rainbow CSV highlighting rules (12 column coverage)
+# Inspired by https://github.com/mechatroner/rainbow_csv
+syntax "CSV" "\.csv$"
+
+color brightmagenta "^("([^"]*"")*[^"]*",?)("([^"]*"")*[^"]*",?)("([^"]*"")*[^"]*",?)("([^"]*"")*[^"]*",?)("([^"]*"")*[^"]*",?)("([^"]*"")*[^"]*",?)("([^"]*"")*[^"]*",?)("([^"]*"")*[^"]*",?)("([^"]*"")*[^"]*",?)("([^"]*"")*[^"]*",?)("([^"]*"")*[^"]*",?)("([^"]*"")*[^"]*",?)|^([^,]*,?))?([^,]*,?))?([^,]*,?))?([^,]*,?))?([^,]*,?))?([^,]*,?))?([^,]*,?))?([^,]*,?))?([^,]*,?))?([^,]*,?))?([^,]*,?))?([^,]*,?))?"
+color brightcyan "^("([^"]*"")*[^"]*",?)("([^"]*"")*[^"]*",?)("([^"]*"")*[^"]*",?)("([^"]*"")*[^"]*",?)("([^"]*"")*[^"]*",?)("([^"]*"")*[^"]*",?)("([^"]*"")*[^"]*",?)("([^"]*"")*[^"]*",?)("([^"]*"")*[^"]*",?)("([^"]*"")*[^"]*",?)("([^"]*"")*[^"]*",?)|^([^,]*,?))?([^,]*,?))?([^,]*,?))?([^,]*,?))?([^,]*,?))?([^,]*,?))?([^,]*,?))?([^,]*,?))?([^,]*,?))?([^,]*,?))?([^,]*,?))?"
+color brightblue "^("([^"]*"")*[^"]*",?)("([^"]*"")*[^"]*",?)("([^"]*"")*[^"]*",?)("([^"]*"")*[^"]*",?)("([^"]*"")*[^"]*",?)("([^"]*"")*[^"]*",?)("([^"]*"")*[^"]*",?)("([^"]*"")*[^"]*",?)("([^"]*"")*[^"]*",?)("([^"]*"")*[^"]*",?)|^([^,]*,?))?([^,]*,?))?([^,]*,?))?([^,]*,?))?([^,]*,?))?([^,]*,?))?([^,]*,?))?([^,]*,?))?([^,]*,?))?([^,]*,?))?"
+color brightyellow "^("([^"]*"")*[^"]*",?)("([^"]*"")*[^"]*",?)("([^"]*"")*[^"]*",?)("([^"]*"")*[^"]*",?)("([^"]*"")*[^"]*",?)("([^"]*"")*[^"]*",?)("([^"]*"")*[^"]*",?)("([^"]*"")*[^"]*",?)("([^"]*"")*[^"]*",?)|^([^,]*,?))?([^,]*,?))?([^,]*,?))?([^,]*,?))?([^,]*,?))?([^,]*,?))?([^,]*,?))?([^,]*,?))?([^,]*,?))?"
+color brightgreen "^("([^"]*"")*[^"]*",?)("([^"]*"")*[^"]*",?)("([^"]*"")*[^"]*",?)("([^"]*"")*[^"]*",?)("([^"]*"")*[^"]*",?)("([^"]*"")*[^"]*",?)("([^"]*"")*[^"]*",?)("([^"]*"")*[^"]*",?)|^([^,]*,?))?([^,]*,?))?([^,]*,?))?([^,]*,?))?([^,]*,?))?([^,]*,?))?([^,]*,?))?([^,]*,?))?"
+color brightred "^("([^"]*"")*[^"]*",?)("([^"]*"")*[^"]*",?)("([^"]*"")*[^"]*",?)("([^"]*"")*[^"]*",?)("([^"]*"")*[^"]*",?)("([^"]*"")*[^"]*",?)("([^"]*"")*[^"]*",?)|^([^,]*,?))?([^,]*,?))?([^,]*,?))?([^,]*,?))?([^,]*,?))?([^,]*,?))?([^,]*,?))?"
+color cyan "^("([^"]*"")*[^"]*",?)("([^"]*"")*[^"]*",?)("([^"]*"")*[^"]*",?)("([^"]*"")*[^"]*",?)("([^"]*"")*[^"]*",?)("([^"]*"")*[^"]*",?)|^([^,]*,)?([^,]*,)?([^,]*,)?([^,]*,)?([^,]*,)?([^,]*,)?"
+color magenta "^("([^"]*"")*[^"]*",?)("([^"]*"")*[^"]*",?)("([^"]*"")*[^"]*",?)("([^"]*"")*[^"]*",?)("([^"]*"")*[^"]*",?)|^([^,]*,)?([^,]*,)?([^,]*,)?([^,]*,)?([^,]*,)?"
+color blue "^("([^"]*"")*[^"]*",?)("([^"]*"")*[^"]*",?)("([^"]*"")*[^"]*",?)("([^"]*"")*[^"]*",?)|^([^,]*,)?([^,]*,)?([^,]*,)?([^,]*,)?"
+color yellow "^("([^"]*"")*[^"]*",?)("([^"]*"")*[^"]*",?)("([^"]*"")*[^"]*",?)|^([^,]*,)?([^,]*,)?([^,]*,)?"
+color green "^("([^"]*"")*[^"]*",?)("([^"]*"")*[^"]*",?)|^([^,]*,)?([^,]*,)?"
+color red "^("([^"]*"")*[^"]*",?)|^([^,]*,?))?"