50 Dark Themes · 18 / 50

Furnace

A warm accent, #FF5A36, on a #1E1516 terminal. Primary text reads at 14.74:1 and secondary text at 6.93:1, measured against that background. Free and MIT licensed, one of the 50 Dark Themes for Claude Code.

Furnace

#FF5A36
✻ Claude Code · furnace
● Applied theme “Furnace”
  3 files changed · staged
> show me the diff
>theme furnace
/theme  ·  ⏎ send  ·  esc to interrupt

Install Furnace.

Requires Claude Code v2.1.118 or later. The marketplace command is needed once per machine; the plugin command installs the whole 50 Dark Themes pack, and /theme inside Claude Code switches to this one.

$ claude plugin marketplace add notgabriels-sys/claude-code-50-dark-themes
$ claude plugin install 50-dark-themes@notgabriels-themes
$ /theme furnace

Plugin themes are read-only. Press Ctrl+E on one in /theme for an editable copy in ~/.claude/themes/.

Or copy just this file.

One theme, no plugin: fetch furnace.json from the repository into your themes folder. If that folder did not exist when Claude Code started, restart it once.

$ mkdir -p ~/.claude/themes && curl -fsSL https://raw.githubusercontent.com/notgabriels-sys/claude-code-50-dark-themes/main/furnace.json -o ~/.claude/themes/furnace.json

Terminal background: #1E1516.

Claude Code colours its own interface; the terminal application owns the canvas behind it. Every figure below is measured against #1E1516, so set that as the terminal background for the result the numbers describe. On a different background the ratios move.

Palette.

The thirteen overrides Claude Code reads from the theme file. Success, error, warning and diff colours are deliberately not overridden, so status meaning stays the same across every theme in the pack.

ColourTokenRole
#FF5A36claudeClaude's mark and accent
#FF9D88claudeShimmerAccent highlight while Claude works
#EDE8E8textPrimary text
#AF9D9EinactiveSecondary text
#332425subtleDecorative hairlines (reserved, carries no meaning)
#FF5A36suggestionAutocomplete suggestions
#FFB84ApermissionPermission prompt border and indicator
#FF5A36promptBorderInput prompt border
#FF9D88promptBorderShimmerPrompt border highlight
#FFB84AplanModePlan mode indicator
#2A1D1FuserMessageBackgroundSurface behind your messages
#362528userMessageBackgroundHoverThat surface, hovered
#FF5A36rate_limit_fillUsage meter fill

Measured contrast.

Computed from the hex values above with the WCAG 2 relative-luminance formula, by the same script that gates every change to this repository. Figures are truncated, never rounded up. Each row meets its floor.

PairColoursRatioFloorStandard
text on terminal background#EDE8E8 on #1E151614.74:17:1WCAG AAA, normal text
text on your-message surface#EDE8E8 on #2A1D1F13.37:17:1WCAG AAA, normal text
inactive on terminal background#AF9D9E on #1E15166.93:14.5:1WCAG AA, normal text
inactive on your-message surface#AF9D9E on #2A1D1F6.29:14.5:1WCAG AA, normal text
claude on terminal background#FF5A36 on #1E15165.76:14.5:1WCAG AA, normal text
claudeShimmer on terminal background#FF9D88 on #1E15168.88:14.5:1WCAG AA, normal text
suggestion on terminal background#FF5A36 on #1E15165.76:14.5:1WCAG AA, normal text
permission on terminal background#FFB84A on #1E151610.39:13:1WCAG AA, non-text
planMode on terminal background#FFB84A on #1E151610.39:13:1WCAG AA, non-text
promptBorder on terminal background#FF5A36 on #1E15165.76:13:1WCAG AA, non-text
promptBorderShimmer on terminal background#FF9D88 on #1E15168.88:13:1WCAG AA, non-text
rate_limit_fill on terminal background#FF5A36 on #1E15165.76:13:1WCAG AA, non-text
your-message surface against the terminal#2A1D1F on #1E15161.10:11.08:1visibly distinct surface
hovered surface against the resting one#362528 on #2A1D1F1.12:11.08:1visibly distinct surface