A minimal, focused theme for TaskPaper with extra styles for tasks tagged with @upcoming, @today, and @overdue

For That Matter.taskpapertheme

<theme>
  
  <!-- For That Matter Theme for TaskPaper
       by Andy Ferra (andyferra.com)
       based on Dark Matter Theme -->
  
  <!-- Colors -->
  
  <color id="tag"            red="0.1" green="0.1" blue="0.1" alpha="1.0" />
  <color id="handle"         red="0.25" green="0.25" blue="0.25" alpha="1.0" />
  <color id="insertionPoint" red="1.0"  green="1.0"  blue="1.0"  alpha="1.0" />
  <color id="selection"      red="0.2"  green="0.2"  blue="0.2"  alpha="1.0" />
  
  
  <!-- Window Style -->
  
  <color id="foreground" red="1.0"  green="1.0"  blue="1.0"  alpha="1.0" />
  <color id="background" red="0.15" green="0.15" blue="0.15" alpha="1.0" />
  
  <window foregroundColorID     = "foreground" 
          backgroundColorID     = "background" 
          shouldUseHUDScrollers = "yes" />


  <!-- Text View Style -->
  
  <font           id                         = "base" 
                  name                       = "Lucida Grande"
                  size                       = "0" />
  
  <characterStyle id                         = "base"
                  fontID                     = "base"
                  foregroundColorID          = "foreground" />
  
  <paragraphStyle id                         = "base" 
                  paragraphSpacingBefore     = "0"
                  paragraphSpacing           = "0"
                  lineSpacing                = "0" 
                  lineHeightMultiple         = "1.3" 
                  alignment                  = "NSLeftTextAlignment" />

  <textView       shouldAntialiasText        = "yes"
                  shouldShowNoteHandles      = "no"
                  shouldShowProjectHandles   = "yes"
                  defaultCharacterStyleID    = "base"
                  textLeftEdgeAlignmentStyle = "TPEntryAlignProjectsAndTasksAndNotesAlighmentStyle"
                  insertionPointColorID      = "insertionPoint"
                  selectionColorID           = "selection"
                  handleColorID              = "handle"
                  tagColorID                 = "tag" />

  <!-- Task style. 
       This section defines the styles that are applied to task lines. -->
  
  <color id="task" red="0.9" green="0.9" blue="0.9" alpha="1.0" />
  
  <font           id                   = "task"
                  extendsFontID        = "base" 
                  size                 = "14" />

  <characterStyle id                   = "task" 
                  fontID               = "task" 
                  foregroundColorID    = "task" />

  <entryRule      matchesQuery         = "type = task"
                  lineCharacterStyleID = "task" 
                  paragraphStyleID     = "base" />


  <!-- Project style. 
       This section defines the styles that are applied to project lines. -->
  
  <color id="project" red="0.8" green="1.0" blue="0.4" alpha="1.0" />
  
  <font           id                   = "project" 
                  extendsFontID        = "base" 
                  fontTraitMask        = "NSBoldFontMask" />

  <characterStyle id                   = "project" 
                  fontID               = "project" 
                  foregroundColorID    = "project" />
                  
  <entryRule      matchesQuery         = "type = &quot;project&quot;" 
                  lineCharacterStyleID = "project" 
                  paragraphStyleID     = "base" />

  
  <!-- GroupHeader style. 
       This section defines the styles that are applied to groupHeader lines. 
       This effects projects too. -->
  
  <color id="groupHeader" extendsColorID="foreground" />
  <color id="groupHeaderGradStart" red="0.2" green="0.2" blue="0.2" alpha="1.0" />
  <color id="groupHeaderGradEnd"   red="0.2" green="0.2" blue="0.2" alpha="1.0" />
  
  <font            id                              = "groupHeader"
                   extendsFontID                   = "base" 
                   fontTraitMask                   = "NSBoldFontMask" 
                   size                            = "18" />
                   
  <characterStyle  id                              = "groupHeader" 
                   fontID                          = "groupHeader" 
                   foregroundColorID               = "groupHeader" />
                   
  <paragraphStyle  id                              = "groupHeader" 
                   extendsParagraphStyleID         = "base" 
                   lineHeightMultiple              = "1.0" 
                   paragraphSpacingBefore          = "40" 
                   paragraphSpacing                = "13" />
                   
  <gradient        id                              = "groupHeader" 
                   startColorID                    = "groupHeaderGradStart" 
                   endColorID                      = "groupHeaderGradEnd" 
                   angle                           = "0" />
  
  <backgroundStyle id                              = "groupHeader"
                   maxWidth                        = "0"
                   xWeight                         = "0"
                   maxHeight                       = "1"
                   yWeight                         = "-0.5"
                   cornerRadiusX                   = "0"
                   cornerRadiusY                   = "0"
                   fillGradientID                  = "groupHeader" />

  <entryRule       matchesQuery                    = "isgroupheader" 
                   paragraphStyleID                = "groupHeader" 
                   lineCharacterStyleID            = "groupHeader" 
                   frontParagraphBackgroundStyleID = "groupHeader" />

  
  <!-- Note style. This section defines the styles that are applied to note lines. -->
  <color id="note" red="0.6" green="0.6" blue="0.6" alpha="1.0" />
  <font id="note" extendsFontID="base" size="11" />
  <characterStyle id="note" fontID="note" foregroundColorID="note" />
  <entryRule matchesQuery="type = note" lineCharacterStyleID="note" paragraphStyleID="base" />

  <!-- @done style. This section defines the styles that are applied to lines tagged with @done. -->
  <color id="done" red="0.5" green="0.5" blue="0.5" alpha="1.0" />
  <characterStyle id="done" foregroundColorID="done" />
  <entryRule matchesQuery="@done" contentCharacterStyleID="done" />
  
  <!-- @today style. This section defines the styles that are applied to lines tagged with @today. -->
  <color id="todayFG" red="0.565" green="1.0" blue="0.412" alpha="1.0" />
  <characterStyle id="today" foregroundColorID="todayFG" />
  <entryRule matchesQuery="(@today) and (not @done)" contentCharacterStyleID="today" />
  
  <!-- @overdue style. This section defines the styles that are applied to lines tagged with @overdue. -->
  <color id="overdueFG" red="0.565" green="1.0"   blue="0.412" alpha="1.0" />
  <color id="overdueBG" red="0.161" green="0.302" blue="0.125" alpha="1.0" />
  <characterStyle id="overdue" backgroundColorID="overdueBG" foregroundColorID="overdueFG" />
  <entryRule matchesQuery="(@overdue) and (not @done)" contentCharacterStyleID="overdue" />
  
  <!-- @upcoming style. This section defines the styles that are applied to lines tagged with @upcoming. -->
  <color id="upcomingFG" red="1.0" green="0.97" blue="0.5" alpha="1.0" />
  <characterStyle id="upcoming" foregroundColorID="upcomingFG" />
  <entryRule matchesQuery="(@upcoming) and (not @done)" contentCharacterStyleID="upcoming" />

</theme>