diff --git a/packages/ui/src/theme/default-themes.ts b/packages/ui/src/theme/default-themes.ts
index c14198955812..ef1776449e4c 100644
--- a/packages/ui/src/theme/default-themes.ts
+++ b/packages/ui/src/theme/default-themes.ts
@@ -35,6 +35,7 @@ import synthwave84ThemeJson from "./themes/synthwave84.json"
 import tokyonightThemeJson from "./themes/tokyonight.json"
 import vercelThemeJson from "./themes/vercel.json"
 import vesperThemeJson from "./themes/vesper.json"
+import abyssThemeJson from "./themes/abyss.json"
 import zenburnThemeJson from "./themes/zenburn.json"
 
 export const oc2Theme = oc2ThemeJson as DesktopTheme
@@ -73,10 +74,12 @@ export const synthwave84Theme = synthwave84ThemeJson as DesktopTheme
 export const tokyonightTheme = tokyonightThemeJson as DesktopTheme
 export const vercelTheme = vercelThemeJson as DesktopTheme
 export const vesperTheme = vesperThemeJson as DesktopTheme
+export const abyssTheme = abyssThemeJson as DesktopTheme
 export const zenburnTheme = zenburnThemeJson as DesktopTheme
 
 export const DEFAULT_THEMES: Record<string, DesktopTheme> = {
   "oc-2": oc2Theme,
+  abyss: abyssTheme,
   amoled: amoledTheme,
   aura: auraTheme,
   ayu: ayuTheme,
diff --git a/packages/ui/src/theme/themes/abyss.json b/packages/ui/src/theme/themes/abyss.json
new file mode 100644
index 000000000000..2831c836f927
--- /dev/null
+++ b/packages/ui/src/theme/themes/abyss.json
@@ -0,0 +1,104 @@
+{
+  "$schema": "https://opencode.ai/desktop-theme.json",
+  "name": "Abyss",
+  "id": "abyss",
+  "light": {
+    "seeds": {
+      "primary": "#003366",
+      "neutral": "#e1e5f2",
+      "interactive": "#003366",
+      "success": "#1a7a33",
+      "warning": "#a67c00",
+      "error": "#b32424",
+      "info": "#0055aa",
+      "diffAdd": "#3d8a5a",
+      "diffDelete": "#c94040"
+    },
+    "overrides": {
+      "background-base": "#e1e5f2",
+      "background-weak": "#d0d7e5",
+      "background-strong": "#ebf0f7",
+      "background-stronger": "#f1f4f9",
+      "surface-base": "#dfebff",
+      "surface-base-hover": "#a9d0f6",
+      "surface-base-active": "#b6d0e9",
+      "surface-inset-base": "#dfebff",
+      "surface-raised-base": "#e3eeff",
+      "surface-raised-base-hover": "#a9d0f6",
+      "surface-raised-strong": "#aec6de",
+      "surface-raised-stronger": "#004284",
+      "surface-float-base": "#728191",
+      "surface-diff-hidden-base": "#71bcff",
+      "text-base": "#001a33",
+      "text-weak": "#4d6680",
+      "text-strong": "#000d1a",
+      "border-base": "#90a0b9",
+      "border-hover": "#aec6de",
+      "border-active": "#004284",
+      "border-selected": "#036",
+      "border-disabled": "#f2f5fa",
+      "border-focus": "#0061bf",
+      "border-strong-base": "#667fa1",
+      "diff-add-base": "#47a17a",
+      "diff-delete-base": "#d05a98",
+      "syntax-type": "#a67c00",
+      "syntax-regexp": "#b92536",
+      "syntax-primitive": "#b32424",
+      "syntax-property": "#003366",
+      "syntax-constant": "#0055aa",
+      "syntax-info": "#0055aa",
+      "markdown-code": "#1a7a33",
+      "markdown-block-quote": "#0061bf"
+    }
+  },
+  "dark": {
+    "seeds": {
+      "primary": "#6688cc",
+      "neutral": "#000c18",
+      "interactive": "#6688cc",
+      "success": "#22aa44",
+      "warning": "#ddbb88",
+      "error": "#f14c4c",
+      "info": "#6688cc",
+      "diffAdd": "#1a7a33",
+      "diffDelete": "#b32424"
+    },
+    "overrides": {
+      "background-base": "#000c18",
+      "background-weak": "#00080f",
+      "background-strong": "#001221",
+      "background-stronger": "#001629",
+      "surface-base": "#132239",
+      "surface-base-hover": "#0e192a",
+      "surface-base-active": "#002028",
+      "surface-inset-base": "#0a0f1f",
+      "surface-raised-base": "#0a0f1f",
+      "surface-raised-base-hover": "#172945",
+      "surface-raised-strong": "#132139",
+      "surface-raised-stronger": "#698bcd",
+      "surface-float-base": "#0e192a",
+      "surface-raised-stronger-non-alpha": "#132039",
+      "surface-diff-hidden-base": "#80a2d5",
+      "text-base": "#8ca6d9",
+      "text-weak": "#7d8dc9",
+      "text-strong": "#99aabb",
+      "border-base": "#2b5277",
+      "border-hover": "#7294d0",
+      "border-active": "#698bcd",
+      "border-selected": "#68c",
+      "border-disabled": "#001b33",
+      "border-focus": "#89a5d8",
+      "border-strong-base": "#386a9a",
+      "diff-add-base": "#209759",
+      "diff-delete-base": "#d02a85",
+      "syntax-type": "#7594d1",
+      "syntax-regexp": "#f4758c",
+      "syntax-primitive": "#ddbb88",
+      "syntax-property": "#88a3d7",
+      "syntax-constant": "#ddbb88",
+      "syntax-info": "#7594d1",
+      "markdown-code": "#22aa44",
+      "markdown-block-quote": "#6c8ece"
+    }
+  }
+}