Dark themes (R3BL Theme, R3BL 2026 Theme, and R3BL 2027 Theme, with italic and non-italic variants) and R3BL 2027 Icons optimized for Rust and Markdown with enhanced semantic highlighting and eye comfort
Full workbench mockup using this variant's colors and tokenColors.
fetchUser.ts
index.ts
README.md
src
components
fetchUser.ts
User
tags
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export interface User { id: string; name: string; role: "admin" | "member"; tags: string[];}/** * Fetch user data by ID * @param id * @returns User object or null if ID is invalid */export async function fetchUser(id: string): Promise<User | null> { if (!id) { return null; } const response = await fetch(`/api/users/${id}`, { method: "GET", headers: { Accept: "application/json" }, }); if (!response.ok) { throw new Error(`HTTP ${response.status}`); } return (await response.json()) as User;}function greet(user: User): string { // Simple greeting function that uses the user's name return `Hello, ${user.name}!`;}
Problems1
Output
Debug Console
Terminal
Ports
~/my-project $ pnpm test
✓ fetchUser passed 12blk
✗Cannot find name 'user'. error
▲warning 412 readylocalhost
http://localhost:3000
WSL
1 1
main*
Copilot
Ln 5, Col 12
Spaces: 2
UTF-8
LF
TypeScript
R3BL Theme (No Italic)
colors
Workbench UI color keys from the theme JSON colors map.
key
HEX
RGB
RGBA
activityBar.background
activityBar.border
activityBar.foreground
activityBarBadge.background
activityBarBadge.foreground
agentsChatInput.border
agentsChatInput.focusBorder
agentsNewSessionButton.border
agentsPanel.border
badge.background
badge.foreground
breadcrumb.activeSelectionForeground
breadcrumb.focusForeground
breadcrumb.foreground
breadcrumbPicker.background
button.background
button.border
button.foreground
button.secondaryBorder
chat.slashCommandBackground
chat.slashCommandForeground
checkbox.border
commandCenter.activeBorder
commandCenter.border
contrastActiveBorder
contrastBorder
debugToolBar.background
debugToolBar.border
diffEditor.insertedLineBackground
diffEditor.insertedTextBackground
diffEditor.removedLineBackground
diffEditor.removedTextBackground
diffEditorGutter.insertedLineBackground
diffEditorGutter.removedLineBackground
diffEditorOverview.insertedForeground
diffEditorOverview.removedForeground
dropdown.background
dropdown.border
dropdown.foreground
dropdown.listBackground
editor.background
editor.findMatchBackground
editor.findMatchBorder
editor.findMatchHighlightBackground
editor.findMatchHighlightBorder
editor.findRangeHighlightBackground
editor.foreground
editor.hoverHighlightBackground
editor.inactiveSelectionBackground
editor.lineHighlightBackground
editor.lineHighlightBorder
editor.rangeHighlightBackground
editor.selectionBackground
editor.selectionHighlightBackground
editor.selectionHighlightBorder
editor.wordHighlightBackground
editor.wordHighlightStrongBackground
editorBracketMatch.background
editorBracketMatch.border
editorCodeLens.foreground
editorCursor.background
editorCursor.foreground
editorError.background
editorError.foreground
editorGroup.border
editorGroup.dropBackground
editorGroupHeader.tabsBackground
editorGroupHeader.tabsBorder
editorGutter.addedBackground
editorGutter.deletedBackground
editorGutter.modifiedBackground
editorHint.border
editorHint.foreground
editorHoverWidget.background
editorHoverWidget.border
editorInfo.background
editorInlayHint.background
editorInlayHint.foreground
editorInlayHint.parameterBackground
editorInlayHint.parameterForeground
editorInlayHint.typeBackground
editorInlayHint.typeForeground
editorLineNumber.activeForeground
editorLineNumber.foreground
editorLink.activeForeground
editorMarkerNavigation.background
editorOverviewRuler.addedForeground
editorOverviewRuler.border
editorOverviewRuler.currentContentForeground
editorOverviewRuler.deletedForeground
editorOverviewRuler.errorForeground
editorOverviewRuler.incomingContentForeground
editorOverviewRuler.infoForeground
editorOverviewRuler.modifiedForeground
editorOverviewRuler.selectionHighlightForeground
editorOverviewRuler.warningForeground
editorOverviewRuler.wordHighlightForeground
editorOverviewRuler.wordHighlightStrongForeground
editorStickyScroll.background
editorStickyScroll.border
editorStickyScrollHover.background
editorSuggestWidget.background
editorSuggestWidget.border
editorSuggestWidget.foreground
editorSuggestWidget.selectedBackground
editorWarning.background
editorWarning.foreground
editorWhitespace.foreground
editorWidget.background
editorWidget.border
editorWidget.resizeBorder
errorForeground
errorLens.errorForeground
errorLens.hintForeground
errorLens.infoForeground
errorLens.warningForeground
extensionButton.prominentBackground
extensionButton.prominentForeground
extensionButton.prominentHoverBackground
focusBorder
foreground
gitDecoration.conflictingResourceForeground
gitDecoration.deletedResourceForeground
gitDecoration.ignoredResourceForeground
gitDecoration.modifiedResourceForeground
gitDecoration.untrackedResourceForeground
input.background
input.border
input.foreground
input.placeholderForeground
inputOption.activeBorder
inputValidation.errorBorder
inputValidation.infoBorder
inputValidation.warningBorder
interactive.activeCodeBorder
interactive.inactiveCodeBorder
list.activeSelectionBackground
list.activeSelectionForeground
list.dropBackground
list.focusBackground
list.focusForeground
list.highlightForeground
list.hoverBackground
list.hoverForeground
list.inactiveSelectionBackground
list.inactiveSelectionForeground
menu.border
menu.selectionBackground
menu.selectionBorder
merge.currentHeaderBackground
merge.incomingHeaderBackground
notificationCenter.border
notificationCenterHeader.background
notificationCenterHeader.foreground
notificationLink.foreground
notifications.background
notifications.border
notifications.foreground
notificationToast.border
panel.background
panel.border
panelInput.border
panelTitle.activeBorder
panelTitle.activeForeground
panelTitle.inactiveForeground
peekView.border
peekViewEditor.background
peekViewEditor.matchHighlightBackground
peekViewEditor.matchHighlightBorder
peekViewEditorStickyScroll.background
peekViewResult.background
peekViewResult.fileForeground
peekViewResult.lineForeground
peekViewResult.matchHighlightBackground
peekViewResult.selectionBackground
peekViewResult.selectionForeground
peekViewTitle.background
peekViewTitleDescription.foreground
peekViewTitleLabel.foreground
pickerGroup.border
pickerGroup.foreground
progressBar.background
quickInput.border
selection.background
settings.dropdownBorder
sideBar.background
sideBar.border
sideBar.foreground
sideBarSectionHeader.border
sideBarTitle.foreground
statusBar.background
statusBar.border
statusBar.debuggingBackground
statusBar.debuggingBorder
statusBar.debuggingForeground
statusBar.foreground
statusBar.noFolderBackground
statusBar.noFolderForeground
statusBarItem.errorBackground
statusBarItem.errorForeground
statusBarItem.prominentBackground
statusBarItem.prominentForeground
statusBarItem.prominentHoverBackground
statusBarItem.warningBackground
statusBarItem.warningForeground
statusBarItem.warningHoverForeground
tab.activeBackground
tab.activeBorder
tab.activeBorderTop
tab.activeFocusedBorder
tab.activeForeground
tab.border
tab.focusedHoverBorder
tab.hoverBackground
tab.hoverForeground
tab.inactiveBackground
tab.inactiveForeground
tab.lastPinnedBorder
tab.selectedBackground
tab.selectedBorder
tab.selectedForeground
tab.unfocusedActiveBackground
tab.unfocusedActiveBorder
tab.unfocusedActiveForeground
tab.unfocusedHoverBackground
tab.unfocusedHoverBorder
tab.unfocusedInactiveBackground
tab.unfocusedInactiveForeground
terminal.ansiBlack
terminal.ansiBlue
terminal.ansiBrightBlack
terminal.ansiBrightBlue
terminal.ansiBrightCyan
terminal.ansiBrightGreen
terminal.ansiBrightMagenta
terminal.ansiBrightRed
terminal.ansiBrightWhite
terminal.ansiBrightYellow
terminal.ansiCyan
terminal.ansiGreen
terminal.ansiMagenta
terminal.ansiRed
terminal.ansiWhite
terminal.ansiYellow
terminal.background
terminal.border
terminal.foreground
terminalCursor.background
terminalCursor.foreground
textBlockQuote.background
textBlockQuote.border
textCodeBlock.background
textPreformat.foreground
textSeparator.foreground
titleBar.activeBackground
titleBar.activeForeground
titleBar.border
titleBar.inactiveBackground
titleBar.inactiveForeground
tree.indentGuidesStroke
walkThrough.embeddedEditorBackground
widget.border
tokenColors
Foregrounds this theme assigns to the token scope catalog. A rule with only a font style is skipped, and a longer matching scope wins. Italic and bold rules are not listed — the preview above shows them in the code.