Change graph line colour

Hi all.
I need to change one line color at summary graph of temperature from my dev.
Single graph seems ok


But on summary graph 2 lines have one colour-red

How to change red colour on TempOutC2 to any other,like some yellow?

LibreNMS data is

Component Version
LibreNMS 1.67-76-g93e43d09b
DB Schema 2020_08_28_212054_drop_uptime_column_outages (173)
PHP 7.4.10
Python 3.6.9
MySQL 10.1.44-MariaDB-0ubuntu0.18.04.1
RRDTool 1.7.0
SNMP NET-SNMP 5.7.3
====================================

[[32mOK[0m] Composer Version: 1.10.13
[[32mOK[0m] Dependencies up-to-date.
[[0;32mOK[0m] Database connection successful
[[0;32mOK[0m] Database schema correct