Cursor Curve Color wrong

Color of the curve background in the cursor dock does not match with the actual curve color. Introduced with: cbc9f566

Requirements

• I searched through the issues if the issue already exists

Steps to reproduce

Expected

Observed

Labplot Version

Release build 2.10.0-1416-gec126d455
Nov 24 2023, 04:33:20
System: Windows 11 Version 2009
Locale: English,United States (Decimal point '.', Group separator ','
Number settings: Decimal point '.', Group separator ',', Exponential 'e', Zero digit '0', Percent '%', Positive/Negative sign '+'/'-' (Updated on restart)
Architecture: x86_64-little_endian-llp64
Kernel: winnt 10.0.22621
C++ Compiler: MSVC 19.29.30148.0
C++ Compiler Flags: /DWIN32 /D_WINDOWS /GR /EHsc /wd4250 /wd4251 /wd4396 /wd4661 /Zc:__cplusplus -W3 -DPSAPI_VERSION=1 /Zc:externC- -O2