1. Installation

  • Start → Add or Remove Programs

  • Uninstall LTspice

    • [ needs admin password ]

  • Download and run the installer program from LTspice download

    • Select “Install for Everybody (all users)”

    • [ needs admin password ]

2. Custom shortcuts and colors


The default colors in LTspice are quite poor, especiall for the waveform viewer. It is possible to change the colors from within the program, but there is no way to load a color theme from the GUI.

The colors below are combined from a few different sources that describe choosing good sets of colors for distinguishing amongst a set (like waveforms) that still perform well for the most common forms of color blindness.

ltspice colors viewer
ltspice colors sch
ltspice colors netlist

The custom shortcuts .ini includes these colors already, but if you want to

To use these colors
  • Use a text editor to view the settings file that LTspice uses on your computer, it is found at:
    C:\Users\<username>\AppData\Roaming\LTspice.ini

  • Replace the [Colors] section with the following:

[Colors]
Grid=11842740
InActiveAxis=9868950
WaveColor0=16777215
WaveColor1=6579300
WaveColor2=1841892
WaveColor3=12090935
WaveColor4=4894285
WaveColor5=10702488
WaveColor6=32767
WaveColor7=2643622
WaveColor8=12550647
WaveColor9=10066329
WaveColor10=32943
WaveColor11=8388736
WaveColor12=128
WaveColor13=44975
SchematicColor0=33792
SchematicColor1=33792
SchematicColor2=132
SchematicColor3=132
SchematicColor4=12779519
SchematicColor5=8684544
SchematicColor6=33924
SchematicColor7=0
SchematicColor8=8684544
SchematicColor9=8650752
SchematicColor10=16711935
SchematicColor11=8684676
SchematicColor12=16777215
SchematicColor13=8650884
NetlistNormalTextColor=0
NetlistCommentTextColor=32768
NetlistDotcmdTextColor=16711680
NetlistBackgroundColor=16777215
ContinuationLineColor=255

2.1. LTspice color formatting

The colors are the 24-bit (3-byte) hex values represented as integers. For example:

  • Grid color is #b4b4b4 which is stored as Grid=11842740.

  • Wave color 12 is #000080 and stored as WaveColor12=128