I have managed to get Plasma 5 to look great using the Glassified theme and Obsidian Coast colors (see full desktop image below). However, I have some problems with the lock screen and the shutdown dialogue box displaying white text on gray background. I have been unable to figure out how to change these colors except for changing theme, which I don't want to do. Could someone help point me in the right direction please? Thank you for your time.

Note: I used postimg. Please let me know if this is how you guys want images posted in this forum.
Full desktop image
https://s9.postimg.org/xg8bhctqn/Screen ... 110336.png
Lock screen
https://s9.postimg.org/suc78yihb/IMG_20 ... 105459.jpg
Shutdown dialogue
https://s9.postimg.org/pnhnpcl6n/IMG_20 ... 110059.jpg

System info:
System: Host: UbuntuGamingMachine Kernel: 4.13.0-37-generic x86_64 (64 bit gcc: 5.4.0)
Desktop: KDE Plasma 5.5.5 (Qt 5.5.1) Distro: Ubuntu 16.04 xenial
Machine: Mobo: ASUSTeK model: P8Z77-V LK v: Rev X.0x Bios: American Megatrends v: 1001 date: 02/01/2013
CPU: Quad core Intel Core i5-3570K (-MCP-) cache: 6144 KB
flags: (lm nx sse sse2 sse3 sse4_1 sse4_2 ssse3 vmx) bmips: 28019
clock speeds: max: 4100 MHz 1: 3502 MHz 2: 3502 MHz 3: 3502 MHz 4: 3502 MHz
Graphics: Card: NVIDIA GK104 [GeForce GTX 670] bus-ID: 01:00.0
Display Server: X.Org 1.19.5 drivers: nvidia (unloaded: fbdev,vesa,nouveau)
Resolution: 1920x1080@60.00hz, 1920x1080@60.00hz
GLX Renderer: GeForce GTX 670/PCIe/SSE2 GLX Version: 4.5.0 NVIDIA 384.111 Direct Rendering: Yes
Audio: Card-1 Intel 7 Series/C210 Series Family High Definition Audio Controller
driver: snd_hda_intel bus-ID: 00:1b.0
Card-2 NVIDIA GK104 HDMI Audio Controller driver: snd_hda_intel bus-ID: 01:00.1
Sound: Advanced Linux Sound Architecture v: k4.13.0-37-generic
Network: Card: Realtek RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller
driver: r8169 v: 2.3LK-NAPI port: d000 bus-ID: 03:00.0
IF: enp3s0 state: up speed: 1000 Mbps duplex: full mac: <filter>
Drives: HDD Total Size: 1240.3GB (30.8% used) ID-1: /dev/sda model: Corsair_Force_GS size: 360.1GB
ID-2: /dev/sdb model: PNY_CS2211_240GB size: 240.1GB
ID-3: /dev/sdc model: WDC_WD6400AAKS size: 640.1GB
Partition: ID-1: / size: 212G used: 172G (86%) fs: ext4 dev: /dev/dm-0
ID-2: /boot size: 472M used: 277M (62%) fs: ext2 dev: /dev/sdb1
ID-3: /home size: 330G used: 177G (57%) fs: ext4 dev: /dev/sda1
ID-4: swap-1 size: 8.53GB used: 0.00GB (0%) fs: swap dev: /dev/dm-1
RAID: No RAID devices: /proc/mdstat, md_mod kernel module present
Sensors: None detected - is lm-sensors installed and configured?
Info: Processes: 236 Uptime: 12 min Memory: 3177.8/15983.0MB Init: systemd runlevel: 5 Gcc sys: 5.4.0
Client: Shell (fish) inxi: 2.2.35

Senlis wrote:I have managed to get Plasma 5 to look great using the Glassified theme and Obsidian Coast colors (see full desktop image below). However, I have some problems with the lock screen and the shutdown dialogue box displaying white text on gray background. I have been unable to figure out how to change these colors except for changing theme, which I don't want to do. Could someone help point me in the right direction please? Thank you for your time.

System info:
System: Host: UbuntuGamingMachine Kernel: 4.13.0-37-generic x86_64 (64 bit gcc: 5.4.0)
Desktop: KDE Plasma 5.5.5 (Qt 5.5.1) Distro: Ubuntu 16.04 xenial

Your plasma is a bit old, latest plasma is now 5.12.3.

If you don't want to change the theme colors then the only option ( I think) is to edit the Qml code.

Back then, plasma 5.5 (?) - A simple where to look: https://www.kubuntuforums.net/showthrea ... post384321

With the Plasma 5.12 - KDE Plasma lockscreen colors and testing lock screen: viewtopic.php?f=14&t=151172

I was playing around some more in the themes and colors windows. It seems that changing the theme color scheme in the themes window has the effect of changing the shutdown and lock screen, while changing the color scheme in the color window seems to change most everything else. It's a little disjointed, but hopefully the upgrade to the next LTS will fix it.

Thanks for the help though.