5250ng
Themes

13 built-in terminal themes.

Every 5250ng theme is a plain JSON file. You can copy any of these themes into your user themes directory and adjust fonts, palette, cursor, CRT effects, and background image.

> SIGN ON USER: QSECOFR PASSWORD: ******** SYSTEM: IBMI01
Amber Phosphor

Monochrome amber CRT terminal — warm phosphor glow reminiscent of early 1980s displays.

> SIGN ON USER: QSECOFR PASSWORD: ******** SYSTEM: IBMI01
Classic Green Screen

Full 16-color palette.

> SIGN ON USER: QSECOFR PASSWORD: ******** SYSTEM: IBMI01
Classic White

Full 16-color palette.

> SIGN ON USER: QSECOFR PASSWORD: ******** SYSTEM: IBMI01
Blue Terminal

Cool blue phosphor display — inspired by later-generation IBM 3278 terminals.

> SIGN ON USER: QSECOFR PASSWORD: ******** SYSTEM: IBMI01
Matrix

Digital rain aesthetic — high-saturation green on deep black.

> SIGN ON USER: QSECOFR PASSWORD: ******** SYSTEM: IBMI01
IBM 3179-2

Full 16-color palette.

> SIGN ON USER: QSECOFR PASSWORD: ******** SYSTEM: IBMI01
Classic Green Screen

Full 16-color palette.

> SIGN ON USER: QSECOFR PASSWORD: ******** SYSTEM: IBMI01
Modern Dark

Full 16-color palette.

> SIGN ON USER: QSECOFR PASSWORD: ******** SYSTEM: IBMI01
Dracula

Popular dark theme with distinctive purple and pink accents.

> SIGN ON USER: QSECOFR PASSWORD: ******** SYSTEM: IBMI01
Monokai

Warm dark theme with vibrant syntax-inspired colors — a developer favorite.

> SIGN ON USER: QSECOFR PASSWORD: ******** SYSTEM: IBMI01
Nord

Arctic, north-bluish color palette — clean and low-contrast.

> SIGN ON USER: QSECOFR PASSWORD: ******** SYSTEM: IBMI01
Solarized Dark

Full 16-color palette.

> SIGN ON USER: QSECOFR PASSWORD: ******** SYSTEM: IBMI01
High Contrast

Full 16-color palette.

Customization

What each theme controls

  • Font family, size, and smoothing
  • Full 16-color palette, or a monochrome override
  • Per-protocol-color mapping (Green / Blue / Red / Cyan / Pink / Yellow / White)
  • Cursor color, shape (Block / Underline / Bar), and blink rate
  • Column separator style
  • Footer status bar colors per segment
  • CRT effects: scanline intensity, phosphor bloom, glow radius, curvature
  • Global brightness and saturation
  • Background image with Stretch / Tile / Center / Fit layout and opacity
JSON shape
{
  "id": "amber_phosphor",
  "displayName": "Amber Phosphor",
  "background": { "mode": "color", "color": "#1a0800" },
  "font": { "family": "IBM Plex Mono", "size": 14 },
  "monochrome": { "enabled": true, "color": "#ffb000" },
  "cursor":  { "shape": "underline", "blinkMs": 530 },
  "crtEffect": {
    "enabled": true,
    "scanlineIntensity": 0.2,
    "phosphorBloom": 0.45,
    "glowRadius": 0.15,
    "curvature": 0.08
  }
}

See the source tree at src/ui/themes/data/terminal/ for every built-in theme's complete JSON.