Is there any way to assign paticular color scheme to an application?

$ inxi --full --verbosity=7 --filter --no-host
System:    Kernel: 5.4.72-1-MANJARO x86_64 bits: 64 compiler: gcc v: 10.2.0 Desktop: KDE Plasma 5.19.5 tk: Qt 5.15.1 
           info: latte-dock wm: kwin_x11 dm: SDDM Distro: Manjaro Linux 
Machine:   Type: Laptop System: Acer product: Predator PH315-51 v: V1.26 serial: <filter> 
           Mobo: CFL model: Sienta_CFS v: V1.26 serial: <filter> UEFI: Insyde v: 1.26 date: 03/27/2019 
Battery:   ID-1: BAT1 charge: 24.4 Wh condition: 39.9/48.9 Wh (82%) volts: 14.9/15.2 model: LG PABAS0241231 type: Li-ion 
           serial: <filter> status: Discharging 
Memory:    RAM: total: 7.62 GiB used: 1.95 GiB (25.5%) 
           RAM Report: permissions: Unable to run dmidecode. Root privileges required. 
CPU:       Topology: 6-Core model: Intel Core i7-8750H bits: 64 type: MT MCP arch: Kaby Lake rev: A L2 cache: 9216 KiB 
           bogomips: 52815 
           Speed: 900 MHz min/max: 800/2200 MHz Core speeds (MHz): 1: 900 2: 900 3: 840 4: 896 5: 839 6: 893 7: 840 8: 835 
           9: 843 10: 840 11: 840 12: 838 
           Flags: 3dnowprefetch abm acpi adx aes aperfmperf apic arat arch_perfmon art avx avx2 bmi1 bmi2 bts clflush 
           clflushopt cmov constant_tsc cpuid cpuid_fault cx16 cx8 de ds_cpl dtes64 dtherm dts epb ept ept_ad erms est f16c 
           flexpriority flush_l1d fma fpu fsgsbase fxsr ht hwp hwp_act_window hwp_epp hwp_notify ibpb ibrs ida intel_pt 
           invpcid invpcid_single lahf_lm lm mca mce md_clear mmx monitor movbe mpx msr mtrr nonstop_tsc nopl nx pae pat pbe 
           pcid pclmulqdq pdcm pdpe1gb pebs pge pln pni popcnt pse pse36 pti pts rdrand rdseed rdtscp rep_good sdbg sep smap 
           smep ss ssbd sse sse2 sse4_1 sse4_2 ssse3 stibp syscall tm tm2 tpr_shadow tsc tsc_adjust tsc_deadline_timer vme vmx 
           vnmi vpid x2apic xgetbv1 xsave xsavec xsaveopt xsaves xtopology xtpr 
Graphics:  Device-1: Intel UHD Graphics 630 vendor: Acer Incorporated ALI driver: i915 v: kernel bus ID: 00:02.0 
           chip ID: 8086:3e9b 
           Device-2: Quanta HD Webcam type: USB driver: uvcvideo bus ID: 1-5:3 chip ID: 0408:a060 serial: <filter> 
           Display: x11 server: X.Org 1.20.9 compositor: kwin_x11 driver: intel resolution: 1920x1080~60Hz s-dpi: 96 
           OpenGL: renderer: Mesa Intel UHD Graphics 630 (CFL GT2) v: 4.6 Mesa 20.1.8 direct render: Yes 
Audio:     Device-1: Intel Cannon Lake PCH cAVS vendor: Acer Incorporated ALI driver: snd_hda_intel v: kernel bus ID: 00:1f.3 
           chip ID: 8086:a348 
           Device-2: NVIDIA GP107GL High Definition Audio driver: snd_hda_intel v: kernel bus ID: 01:00.1 chip ID: 10de:0fb9 
           Sound Server: ALSA v: k5.4.72-1-MANJARO 
Network:   Device-1: Intel Wireless-AC 9560 [Jefferson Peak] driver: iwlwifi v: kernel port: 5000 bus ID: 00:14.3 
           chip ID: 8086:a370 
           IF: wlp0s20f3 state: down mac: <filter> 
           Device-2: Realtek RTL8111/8168/8411 PCI Express Gigabit Ethernet vendor: Acer Incorporated ALI driver: r8169 
           v: kernel port: 3000 bus ID: 06:00.1 chip ID: 10ec:8168 
           IF: enp6s0f1 state: up speed: 100 Mbps duplex: full mac: <filter> 
           IP v4: <filter> type: dynamic noprefixroute scope: global broadcast: <filter> 
           IP v6: <filter> type: noprefixroute scope: link 
           WAN IP: <filter> 
Drives:    Local Storage: total: 1.03 TiB used: 252.08 GiB (24.0%) 
           ID-1: /dev/sda vendor: SK Hynix model: HFS128G39TND-N210A size: 119.24 GiB speed: 6.0 Gb/s serial: <filter> 
           rev: 1P10 scheme: GPT 
           ID-2: /dev/sdb vendor: HGST (Hitachi) model: HTS721010A9E630 size: 931.51 GiB speed: 6.0 Gb/s rotation: 7200 rpm 
           serial: <filter> rev: A3J0 scheme: GPT 
           Message: No Optical or Floppy data was found. 
RAID:      Message: No RAID data was found. 
Partition: ID-1: / size: 108.50 GiB used: 16.69 GiB (15.4%) fs: ext4 dev: /dev/sda3 label: N/A 
           uuid: 4552388e-f48d-4e6a-9332-d17dd1dafa75 
           ID-2: /boot/efi size: 511.0 MiB used: 312 KiB (0.1%) fs: vfat dev: /dev/sda1 label: N/A uuid: D36A-C06D 
           ID-3: /mnt/c94d185c-f75f-453b-bc8b-aff8bc598341 size: 915.89 GiB used: 235.39 GiB (25.7%) fs: ext4 dev: /dev/sdb1 
           label: N/A uuid: c94d185c-f75f-453b-bc8b-aff8bc598341 
Swap:      ID-1: swap-1 type: partition size: 8.00 GiB used: 0 KiB (0.0%) priority: -2 dev: /dev/sda2 label: N/A 
           uuid: d36f260e-c0c3-44b4-9de8-42c6a9046287 
Unmounted: Message: No unmounted partitions found. 
USB:       Hub: 1-0:1 info: Full speed (or root) Hub ports: 16 rev: 2.0 speed: 480 Mb/s chip ID: 1d6b:0002 
           Device-1: 1-4:2 info: Logitech G203 Gaming Mouse type: Mouse,HID driver: hid-generic,usbhid interfaces: 2 rev: 2.0 
           speed: 12 Mb/s chip ID: 046d:c084 serial: <filter> 
           Device-2: 1-5:3 info: Quanta HD Webcam type: Video driver: uvcvideo interfaces: 2 rev: 2.0 speed: 480 Mb/s 
           chip ID: 0408:a060 serial: <filter> 
           Device-3: 1-14:4 info: Intel Bluetooth 9460/9560 Jefferson Peak (JfP) type: Bluetooth driver: btusb interfaces: 2 
           rev: 2.0 speed: 12 Mb/s chip ID: 8087:0aaa 
           Hub: 2-0:1 info: Full speed (or root) Hub ports: 8 rev: 3.1 speed: 10 Gb/s chip ID: 1d6b:0003 
Sensors:   System Temperatures: cpu: 53.0 C mobo: N/A 
           Fan Speeds (RPM): N/A 
Info:      Processes: 283 Uptime: 33m Init: systemd v: 246 Compilers: gcc: 10.2.0 Packages: pacman: 1246 Shell: Bash v: 5.0.18 
           running in: konsole inxi: 3.1.05 

I’m using a dark color scheme and I run cisco packet tracer, It doesn’t go well with it. It shows arbitrary black patches and text turns white (Some text).
When I switch to light color theme things go well, Packet tracer looks good, no more black patches and some white text.

Is there any way to use light color scheme when I use packet tracer and dark color scheme when I use rest of the things?

Only if the application implement something on its own.

Maybe you can set a environment variable - after all it is KDE - and they have done weirder things than that :grin: