diff --git a/runtime/themes/modus_operandi.toml b/runtime/themes/modus_operandi.toml
new file mode 100644
index 000000000..2247bb3be
--- /dev/null
+++ b/runtime/themes/modus_operandi.toml
@@ -0,0 +1,194 @@
+# Author: Alexis Mousset <contact@amousset.me>
+# Adapted from https://protesilaos.com/emacs/modus-themes, by Protesilaos Stavrou
+# Version 4.3.0
+#
+
+# Syntax highlighting
+# -------------------
+"type" = "cyan-cooler"
+"constructor" = "cyan-cooler"
+
+"constant" = "blue-cooler"
+"constant.character.escape" = "magenta"
+
+"string" = "blue-warmer"
+"string.regexp" = "magenta-faint"
+"string.special" = "blue-faint" # used for colors in CSS
+
+"comment" = "fg-dim"
+
+"variable.parameter" = "cyan"
+"variable.builtin" = "magenta-cooler"
+"label" = "fg-dim" # used for language in markdown code blocks
+"keyword" = "magenta-cooler"
+"keyword.directive" = "red-cooler"
+"function" = "magenta"
+"function.macro" = "magenta-warmer"
+
+punctuation = "fg-dim"
+"tag" = "magenta"
+"attribute" = "cyan-cooler"
+"namespace" = "blue-cooler"
+"special" = "red-cooler"
+
+"markup.heading.marker" = "fg-dim"
+"markup.heading.1" = { fg = "fg-main", modifiers = ["bold"] }
+"markup.heading.2" = { fg = "yellow-faint", modifiers = ["bold"] }
+"markup.heading.3" = { fg = "fg-alt", modifiers = ["bold"] }
+"markup.heading.4" = { fg = "magenta", modifiers = ["bold"] }
+"markup.heading.5" = { fg = "green-faint", modifiers = ["bold"] }
+"markup.heading.6" = { fg = "red-faint", modifiers = ["bold"] }
+"markup.list" = "fg-dim"
+"markup.list.checked" = { fg = "yellow-warmer" }
+"markup.list.unchecked" = { fg = "yellow-warmer" }
+"markup.bold" = { modifiers = ["bold"] }
+"markup.italic" = { modifiers = ["italic"] }
+"markup.strikethrough" = { modifiers = ["crossed_out"] }
+"markup.link.url" = { fg = "cyan" }
+"markup.link.text" = { fg = "blue-warmer", modifiers = ["underlined"] }
+"markup.raw.block" = { bg = "bg-dim" }
+"markup.raw.inline" = { fg = "green-cooler" }
+
+"diff.plus" = { fg = "fg-added", bg = "bg-added" }
+"diff.plus.gutter" = "green-intense"
+"diff.minus" = { fg = "fg-removed", bg = "bg-removed" }
+"diff.minus.gutter" = "red-intense"
+"diff.delta" = { fg = "fg-changed", bg = "bg-changed" }
+"diff.delta.gutter" = "yellow-intense"
+
+# User Interface
+# --------------
+
+"ui.background" = { bg = "bg-main" }
+
+"ui.linenr" = { fg = "fg-dim", bg = "bg-dim" }
+"ui.linenr.selected" = { fg = "fg-main", bg = "bg-active" }
+
+"ui.statusline" = { fg = "fg-mode-line-active", bg = "bg-mode-line-active" }
+"ui.statusline.inactive" = { fg = "fg-mode-line-inactive", bg = "bg-mode-line-inactive" }
+"ui.statusline.normal" = { fg = "blue-warmer" }
+"ui.statusline.insert" = { fg = "green-warmer" }
+"ui.statusline.select" = { fg = "magenta-warmer" }
+
+"ui.popup" = { fg = "fg-main", bg = "bg-dim" }
+"ui.window" = { fg = "fg-dim" }
+"ui.help" = { fg = "fg-main", bg = "bg-dim" }
+"ui.gutter" = { bg = "bg-dim" }
+"ui.text" = "fg-main"
+"ui.text.focus" = { fg = "fg-main", bg = "bg-completion", modifiers = ["bold"] }
+"ui.text.inactive" = { fg = "fg-dim" }
+"ui.virtual" = "bg-active"
+"ui.virtual.ruler" = { bg = "bg-dim" }
+"ui.virtual.inlay-hint" = { fg = "fg-dim", modifiers = ["italic"] }
+
+"ui.selection" = { fg = "fg-main", bg = "bg-inactive" }
+"ui.selection.primary" = { fg = "fg-main", bg = "bg-active" }
+
+"ui.cursor" = { fg = "bg-main", bg = "fg-main" }
+"ui.cursor.primary" = { fg = "bg-main", bg = "fg-dim" }
+"ui.cursor.match" = { bg = "bg-paren-match" }
+"ui.cursorline.primary" = { bg = "bg-hl-line" }
+
+"ui.highlight" = { bg = "bg-hl-line" }
+
+"ui.menu" = { fg = "fg-main", bg = "bg-dim" }
+"ui.menu.selected" = { fg = "fg-main", bg = "bg-completion", modifiers = ["bold"] }
+"ui.menu.scroll" = { fg = "fg-dim", bg = "bg-cyan-intense" }
+
+"diagnostic.error" = { underline = { color = "red-intense", style = "curl" } }
+"diagnostic.warning" = { underline = { color = "yellow-intense", style = "curl" } }
+"diagnostic.info" = { underline = { color = "cyan-intense", style = "curl" } }
+"diagnostic.hint" = { underline = { color = "blue-intense", style = "curl" } }
+
+error = "red"
+warning = "yellow-warmer"
+info = "cyan-cooler"
+hint = "blue-cooler"
+
+[palette]
+# Basic values
+bg-main = "#ffffff"
+bg-dim = "#f2f2f2"
+fg-main = "#000000"
+fg-dim = "#595959"
+fg-alt = "#193668"
+bg-active = "#c4c4c4"
+bg-inactive = "#e0e0e0"
+
+# Common accent foregrounds
+red = "#a60000"
+red-warmer = "#972500"
+red-cooler = "#a0132f"
+red-faint = "#7f0000"
+red-intense = "#d00000"
+green = "#006800"
+green-warmer = "#316500"
+green-cooler = "#00663f"
+green-faint = "#2a5045"
+green-intense = "#008900"
+yellow = "#6f5500"
+yellow-warmer = "#884900"
+yellow-cooler = "#7a4f2f"
+yellow-faint = "#624416"
+yellow-intense = "#808000"
+blue = "#0031a9"
+blue-warmer = "#354fcf"
+blue-cooler = "#0000b0"
+blue-faint = "#003497"
+blue-intense = "#0000ff"
+magenta = "#721045"
+magenta-warmer = "#8f0075"
+magenta-cooler = "#531ab6"
+magenta-faint = "#7c318f"
+magenta-intense = "#dd22dd"
+cyan = "#005e8b"
+cyan-warmer = "#3f578f"
+cyan-cooler = "#005f5f"
+cyan-faint = "#005077"
+cyan-intense = "#008899"
+
+# Common accent backgrounds
+bg-red-intense = "#ff8f88"
+bg-green-intense = "#8adf80"
+bg-yellow-intense = "#f3d000"
+bg-blue-intense = "#bfc9ff"
+bg-magenta-intense = "#dfa0f0"
+bg-cyan-intense = "#a4d5f9"
+
+bg-red-subtle = "#ffcfbf"
+bg-green-subtle = "#b3fabf"
+bg-yellow-subtle = "#fff576"
+bg-blue-subtle = "#ccdfff"
+bg-magenta-subtle = "#ffddff"
+bg-cyan-subtle = "#bfefff"
+
+bg-red-nuanced = "#fff1f0"
+bg-green-nuanced = "#ecf7ed"
+bg-yellow-nuanced = "#fff3da"
+bg-blue-nuanced = "#f3f3ff"
+bg-magenta-nuanced = "#fdf0ff"
+bg-cyan-nuanced = "#ebf6fa"
+
+# Special purpose
+bg-completion = "#c0deff"
+bg-hl-line = "#dae5ec"
+
+bg-mode-line-active = "#c8c8c8"
+fg-mode-line-active = "#000000"
+bg-mode-line-inactive = "#e6e6e6"
+fg-mode-line-inactive = "#585858"
+
+modeline-err = "#7f0000"
+modeline-warning = "#5f0070"
+modeline-info = "#002580"
+
+# Diffs
+bg-added = "#c1f2d1"
+fg-added = "#005000"
+bg-changed = "#ffdfa9"
+fg-changed = "#553d00"
+bg-removed = "#ffd8d5"
+fg-removed = "#8f1313"
+
+# Paren match
+bg-paren-match = "#5fcfff"
diff --git a/runtime/themes/modus_operandi_deuteranopia.toml b/runtime/themes/modus_operandi_deuteranopia.toml
new file mode 100644
index 000000000..28601d37f
--- /dev/null
+++ b/runtime/themes/modus_operandi_deuteranopia.toml
@@ -0,0 +1,46 @@
+# Author: Alexis Mousset <contact@amousset.me>
+# modus_operandi.toml variant
+#
+# This variant is optimized for users with red-green color deficiency (deuteranopia)
+
+inherits = "modus_operandi"
+
+"constant.character.escape" = "magenta"
+"comment" = "yellow-cooler"
+"function" = "magenta"
+"tag" = "magenta"
+
+"ui.cursor" = { fg = "bg-main", bg = "blue-intense" }
+"ui.cursor.primary.normal" = { fg = "bg-main", bg = "blue-intense" }
+
+"diagnostic.error" = { underline = { color = "yellow-intense", style = "curl" } }
+"diagnostic.warning" = { underline = { color = "magenta-faint", style = "curl" } }
+"diagnostic.info" = { underline = { color = "cyan", style = "curl" } }
+"diagnostic.hint" = { underline = { color = "blue", style = "curl" } }
+
+error = "yellow-intense"
+warning = "magenta-faint"
+info = "cyan"
+hint = "blue"
+
+[palette]
+
+yellow = "#695500"
+yellow-warmer = "#973300"
+yellow-cooler = "#77492f"
+
+bg-mode-line-active = "#d0d6ff"
+fg-mode-line-active = "#0f0f0f"
+border-mode-line-active = "#4f4f74"
+
+modeline-err = "#603a00"
+modeline-warning = "#454500"
+modeline-info = "#023d92"
+
+# Diffs
+bg-added = "#d5d7ff"
+fg-added = "#303099"
+bg-changed = "#eecfdf"
+fg-changed = "#6f1343"
+bg-removed = "#f4f099"
+fg-removed = "#553d00"
diff --git a/runtime/themes/modus_operandi_tinted.toml b/runtime/themes/modus_operandi_tinted.toml
new file mode 100644
index 000000000..14faf0e5a
--- /dev/null
+++ b/runtime/themes/modus_operandi_tinted.toml
@@ -0,0 +1,45 @@
+# Author: Alexis Mousset <contact@amousset.me>
+# modus_operandi.toml variant
+
+inherits = "modus_operandi"
+
+"comment" = "red-faint"
+
+"ui.cursor.primary" = { fg = "bg-main", bg = "red" }
+
+[palette]
+# Basic values
+bg-main = "#fbf7f0"
+bg-dim = "#efe9dd"
+bg-active = "#c9b9b0"
+bg-inactive = "#dfd5cf"
+border = "#9f9690"
+
+# Common accent backgrounds
+bg-red-nuanced = "#ffe8f0"
+bg-green-nuanced = "#e0f5e0"
+bg-yellow-nuanced = "#f9ead0"
+bg-blue-nuanced = "#ebebff"
+bg-magenta-nuanced = "#f6e7ff"
+bg-cyan-nuanced = "#e1f3fc"
+
+# Special purpose
+bg-completion = "#f0c1cf"
+bg-hl-line = "#f1d5d0"
+bg-region = "#c2bcb5"
+
+bg-mode-line-active = "#cab9b2"
+border-mode-line-active = "#545454"
+bg-mode-line-inactive = "#dfd9cf"
+border-mode-line-inactive = "#a59a94"
+
+bg-tab-bar = "#e0d4ce"
+bg-tab-current = "#fbf7f0"
+bg-tab-other = "#c8b8b2"
+
+# Diffs
+bg-added = "#c3ebc1"
+bg-removed = "#f4d0cf"
+
+# Paren match
+bg-paren-match = "#7fdfcf"
diff --git a/runtime/themes/modus_operandi_tritanopia.toml b/runtime/themes/modus_operandi_tritanopia.toml
new file mode 100644
index 000000000..8149f653e
--- /dev/null
+++ b/runtime/themes/modus_operandi_tritanopia.toml
@@ -0,0 +1,73 @@
+# Author: Alexis Mousset <contact@amousset.me>
+# modus_operandi.toml variant
+#
+# This variant is optimized for users with blue-yellow color deficiency (tritanopia)
+
+inherits = "modus_operandi"
+
+"type" = "blue-warmer"
+"constructor" = "blue-warmer"
+"constant" = "green-cooler"
+"constant.character.escape" = "red-cooler"
+"string" = "cyan"
+"comment" = "red-faint"
+"variable.parameter" = "cyan-cooler"
+"keyword" = "red-cooler"
+"keyword.directive" = "red-warmer"
+"function" = "cyan-warmer"
+"function.macro" = "magenta"
+"tag" = "red-cooler"
+
+"markup.heading.2" = { fg = "red-faint", modifiers = ["bold"] }
+"markup.heading.3" = { fg = "cyan-faint", modifiers = ["bold"] }
+"markup.heading.6" = { fg = "magenta-faint", modifiers = ["bold"] }
+"markup.link.url" = { fg = "cyan-cooler" }
+"markup.link.text" = { fg = "cyan", modifiers = ["underlined"] }
+
+"ui.cursor" = { fg = "bg-main", bg = "red-intense" }
+"ui.cursor.primary.normal" = { fg = "bg-main", bg = "red-intense" }
+
+"diagnostic.error" = { underline = { color = "red-warmer", style = "curl" } }
+"diagnostic.warning" = { underline = { color = "magenta", style = "curl" } }
+"diagnostic.info" = { underline = { color = "cyan", style = "curl" } }
+"diagnostic.hint" = { underline = { color = "blue", style = "curl" } }
+
+error = "red-warmer"
+warning = "magenta"
+info = "cyan"
+hint = "blue"
+
+[palette]
+
+# Common accent foregrounds
+red-warmer = "#b21100"
+red-faint = "#702000"
+yellow = "#695500"
+yellow-warmer = "#973300"
+yellow-cooler = "#77492f"
+magenta-intense = "#cd22bd"
+cyan-faint = "#004f5f"
+
+# Special purpose
+bg-completion = "#afdfef"
+bg-hover = "#ffafbc"
+bg-hover-secondary = "#9fdfff"
+bg-hl-line = "#dfeaec"
+
+bg-char-0 = "#ff908f"
+bg-char-1 = "#bfbfff"
+bg-char-2 = "#5fcfdf"
+
+bg-mode-line-active = "#afe0f2"
+fg-mode-line-active = "#0f0f0f"
+border-mode-line-active = "#2f4f44"
+
+modeline-err = "#8f0000"
+modeline-warning = "#6f306f"
+modeline-info = "#00445f"
+
+# Diffs
+bg-added = "#b5e7ff"
+fg-added = "#005079"
+bg-changed = "#eecfdf"
+fg-changed = "#6f1343"