IO Graph Colour issue

Summary

(Summarize the bug encountered concisely)

Steps to reproduce

(How one can reproduce the issue - this is very important)

What is the current bug behavior?

(What actually happens) I am using the I/O Graphs quite a lot. In release 3.4.5 (Windows 64 bit) the colour for the line option is working as expected, this is however not the case when the bar option is chosen instead of line. You can select any colour but the bar on the graph stays the same(dark almost black)

What is the expected correct behavior?

I expect when I chose the bar option in the graph, that the colour would match what I have chosen

Sample capture file

(If possible attach a sample capture file, not screenshot of dissection, showing this issue)

Relevant logs and/or screenshots

See attached file

## Build information

Version 3.4.5 (v3.4.5-0-g7db1feb4) Copyright 1998-2021 Gerald Combs gerald@wireshark.org and contributors. License GPLv2+: GNU GPL version 2 or later https://www.gnu.org/licenses/gpl-2.0.html This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. Compiled (64-bit) with Qt 5.15.1, with libpcap, with GLib 2.52.3, with zlib 1.2.11, with SMI 0.4.8, with c-ares 1.15.0, with Lua 5.2.4, with GnuTLS 3.6.3 and PKCS #11 (closed) support, with Gcrypt 1.8.3, with MIT Kerberos, with MaxMind DB resolver, with nghttp2 1.39.2, with brotli, with LZ4, with Zstandard, with Snappy, with libxml2 2.9.9, with QtMultimedia, with automatic updates using WinSparkle 0.5.7, with AirPcap, with SpeexDSP (using bundled resampler), with Minizip. Running on 64-bit Windows 10 (1909), build 18363, with Intel(R) Core(TM) i7-8650U CPU @ 1.90GHz (with SSE4.2), with 16242 MB of physical memory, with locale English_South Africa.utf8, with light display mode, without HiDPI, with Npcap version 1.10, based on libpcap version 1.9.1, with GnuTLS 3.6.3, with Gcrypt 1.8.3, with brotli 1.0.2, without AirPcap, binary plugins supported (21 loaded). Built using Microsoft Visual Studio 2019 (VC++ 14.28, build 29910). Wireshark is Open Source Software released under the GNU General Public License. Check the man page and https://www.wireshark.org for more information.