Hi, I can't change the blame line color. I'd read readme, and tried change Gutter Heatmap settings but nothing was changed.

Where is there that settings?
try adding this to your local settings.json:
"workbench.colorCustomizations": {
"gitlens.trailingLineForegroundColor":"#ff0000"
}
After reviewing the documentation, I had to do some trail and error to figure out which one actually targeted the correct type of text.
try adding this to your local
settings.json:"workbench.colorCustomizations": { "gitlens.trailingLineForegroundColor":"#ff0000" }After reviewing the documentation, I had to do some trail and error to figure out which one actually targeted the correct type of text.
Yes, it works, thank you!
Most helpful comment
try adding this to your local
settings.json:After reviewing the documentation, I had to do some trail and error to figure out which one actually targeted the correct type of text.
https://github.com/eamodio/vscode-gitlens#themable-colors-