diff --git a/src/browser/components/RuntimeBadge.tsx b/src/browser/components/RuntimeBadge.tsx
index e70bdf3bde..d0608bf7e7 100644
--- a/src/browser/components/RuntimeBadge.tsx
+++ b/src/browser/components/RuntimeBadge.tsx
@@ -14,20 +14,24 @@ interface RuntimeBadgeProps {
 }
 
 // Runtime-specific color schemes - each type has consistent colors in idle/working states
+// Colors use CSS variables (--color-runtime-*) so they adapt to theme (e.g., solarized)
 // Idle: subtle with visible colored border for discrimination
 // Working: brighter colors with pulse animation
 const RUNTIME_STYLES = {
   ssh: {
-    idle: "bg-transparent text-muted border-blue-500/50",
-    working: "bg-blue-500/20 text-blue-400 border-blue-500/60 animate-pulse",
+    idle: "bg-transparent text-muted border-[var(--color-runtime-ssh)]/50",
+    working:
+      "bg-[var(--color-runtime-ssh)]/20 text-[var(--color-runtime-ssh-text)] border-[var(--color-runtime-ssh)]/60 animate-pulse",
   },
   worktree: {
-    idle: "bg-transparent text-muted border-purple-500/50",
-    working: "bg-purple-500/20 text-purple-400 border-purple-500/60 animate-pulse",
+    idle: "bg-transparent text-muted border-[var(--color-runtime-worktree)]/50",
+    working:
+      "bg-[var(--color-runtime-worktree)]/20 text-[var(--color-runtime-worktree-text)] border-[var(--color-runtime-worktree)]/60 animate-pulse",
   },
   local: {
-    idle: "bg-transparent text-muted border-muted/50",
-    working: "bg-muted/30 text-muted border-muted/60 animate-pulse",
+    idle: "bg-transparent text-muted border-[var(--color-runtime-local)]/50",
+    working:
+      "bg-[var(--color-runtime-local)]/30 text-[var(--color-runtime-local)] border-[var(--color-runtime-local)]/60 animate-pulse",
   },
 } as const;
 
diff --git a/src/browser/components/RuntimeIconSelector.tsx b/src/browser/components/RuntimeIconSelector.tsx
index e95da78d86..a19ba2fcd1 100644
--- a/src/browser/components/RuntimeIconSelector.tsx
+++ b/src/browser/components/RuntimeIconSelector.tsx
@@ -16,19 +16,23 @@ interface RuntimeIconSelectorProps {
 }
 
 // Runtime-specific color schemes matching RuntimeBadge
+// Colors use CSS variables (--color-runtime-*) so they adapt to theme (e.g., solarized)
 // Selected (active) uses the "working" styling, unselected uses "idle"
 const RUNTIME_STYLES = {
   ssh: {
-    idle: "bg-transparent text-muted border-blue-500/30 hover:border-blue-500/50",
-    active: "bg-blue-500/20 text-blue-400 border-blue-500/60",
+    idle: "bg-transparent text-muted border-[var(--color-runtime-ssh)]/30 hover:border-[var(--color-runtime-ssh)]/50",
+    active:
+      "bg-[var(--color-runtime-ssh)]/20 text-[var(--color-runtime-ssh-text)] border-[var(--color-runtime-ssh)]/60",
   },
   worktree: {
-    idle: "bg-transparent text-muted border-purple-500/30 hover:border-purple-500/50",
-    active: "bg-purple-500/20 text-purple-400 border-purple-500/60",
+    idle: "bg-transparent text-muted border-[var(--color-runtime-worktree)]/30 hover:border-[var(--color-runtime-worktree)]/50",
+    active:
+      "bg-[var(--color-runtime-worktree)]/20 text-[var(--color-runtime-worktree-text)] border-[var(--color-runtime-worktree)]/60",
   },
   local: {
-    idle: "bg-transparent text-muted border-muted/30 hover:border-muted/50",
-    active: "bg-muted/30 text-foreground border-muted/60",
+    idle: "bg-transparent text-muted border-[var(--color-runtime-local)]/30 hover:border-[var(--color-runtime-local)]/50",
+    active:
+      "bg-[var(--color-runtime-local)]/30 text-foreground border-[var(--color-runtime-local)]/60",
   },
 } as const;
 
diff --git a/src/browser/components/ThinkingSlider.tsx b/src/browser/components/ThinkingSlider.tsx
index c18c4f29d8..ad2f4b50cd 100644
--- a/src/browser/components/ThinkingSlider.tsx
+++ b/src/browser/components/ThinkingSlider.tsx
@@ -7,48 +7,52 @@ import { getThinkingPolicyForModel } from "@/browser/utils/thinking/policy";
 import { updatePersistedState } from "@/browser/hooks/usePersistedState";
 import { getLastThinkingByModelKey } from "@/common/constants/storage";
 
-// Subtle consistent glow for active levels
-const GLOW = {
-  track: "0 0 6px 1px hsl(271 76% 53% / 0.3)",
-  thumb: "0 0 4px 1px hsl(271 76% 53% / 0.3)",
-};
-
+// Uses CSS variable --color-thinking-mode for theme compatibility
+// Glow is applied via CSS using color-mix with the theme color
 const GLOW_INTENSITIES: Record<number, { track: string; thumb: string }> = {
   0: { track: "none", thumb: "none" },
-  1: GLOW,
-  2: GLOW,
-  3: GLOW,
+  1: {
+    track: "0 0 6px 1px color-mix(in srgb, var(--color-thinking-mode) 30%, transparent)",
+    thumb: "0 0 4px 1px color-mix(in srgb, var(--color-thinking-mode) 30%, transparent)",
+  },
+  2: {
+    track: "0 0 6px 1px color-mix(in srgb, var(--color-thinking-mode) 30%, transparent)",
+    thumb: "0 0 4px 1px color-mix(in srgb, var(--color-thinking-mode) 30%, transparent)",
+  },
+  3: {
+    track: "0 0 6px 1px color-mix(in srgb, var(--color-thinking-mode) 30%, transparent)",
+    thumb: "0 0 4px 1px color-mix(in srgb, var(--color-thinking-mode) 30%, transparent)",
+  },
 };
 
-// Continuous function for text styling based on level (n: 0-3)
-const getTextStyle = (n: number) => {
+// Text styling based on level (n: 0-3)
+// Uses CSS variables for theme compatibility
+const getTextStyle = (n: number): React.CSSProperties => {
   if (n === 0) {
     return {
-      color: "#606060",
+      color: "var(--color-text-secondary)",
       fontWeight: 400,
       textShadow: "none",
       fontSize: "10px",
     };
   }
 
-  // Continuous interpolation for n = 1-3
-  const hue = 271 + (n - 1) * 7; // 271 → 278 → 285
-  const lightness = 65 - (n - 1) * 5; // 65 → 60 → 55
+  // Active levels use the thinking mode color
+  // Low uses lighter variant, medium/high use main color
   const fontWeight = 400 + n * 100; // 500 → 600 → 700
-  const shadowBlur = n * 4; // 4 → 8 → 12
-  const shadowOpacity = 0.3 + n * 0.15; // 0.45 → 0.6 → 0.75
 
   return {
-    color: `hsl(${hue} 76% ${lightness}%)`,
+    color: n === 1 ? "var(--color-thinking-mode-light)" : "var(--color-thinking-mode)",
     fontWeight,
-    textShadow: `0 0 ${shadowBlur}px hsl(${hue} 76% ${lightness}% / ${shadowOpacity})`,
+    textShadow: "none",
     fontSize: "10px",
   };
 };
 
 const getSliderStyles = (value: number, isHover = false) => {
   const effectiveValue = isHover ? Math.min(value + 1, 3) : value;
-  const thumbBg = value === 0 ? "#606060" : `hsl(271 76% ${53 + value * 5}%)`;
+  // Use CSS variable for thumb color when active
+  const thumbBg = value === 0 ? "var(--color-text-secondary)" : "var(--color-thinking-mode)";
 
   return {
     trackShadow: GLOW_INTENSITIES[effectiveValue].track,
diff --git a/src/browser/styles/globals.css b/src/browser/styles/globals.css
index dda9054231..d032fa4068 100644
--- a/src/browser/styles/globals.css
+++ b/src/browser/styles/globals.css
@@ -62,6 +62,13 @@
     --color-thinking-mode-light: hsl(271 76% 65%);
     --color-thinking-border: hsl(271 76% 53%);
 
+    /* Runtime icon colors (matches Tailwind blue-500/purple-500) */
+    --color-runtime-ssh: #3b82f6;
+    --color-runtime-ssh-text: #60a5fa; /* blue-400 */
+    --color-runtime-worktree: #a855f7;
+    --color-runtime-worktree-text: #c084fc; /* purple-400 */
+    --color-runtime-local: hsl(0 0% 60%); /* matches --color-muted-foreground */
+
     /* Background & Layout */
     --color-background: hsl(0 0% 12%);
     --color-background-secondary: hsl(60 1% 15%);
@@ -300,6 +307,13 @@
   --color-thinking-mode-light: hsl(271 70% 62%);
   --color-thinking-border: hsl(271 70% 46%);
 
+  /* Runtime icon colors (matches Tailwind blue-500/purple-500) */
+  --color-runtime-ssh: #3b82f6;
+  --color-runtime-ssh-text: #60a5fa;
+  --color-runtime-worktree: #a855f7;
+  --color-runtime-worktree-text: #c084fc;
+  --color-runtime-local: hsl(210 14% 48%); /* matches --color-muted-foreground */
+
   --color-background: hsl(210 33% 98%);
   --color-background-secondary: hsl(210 36% 95%);
   --color-border: hsl(210 24% 82%);
@@ -519,9 +533,16 @@
   --color-debug-light: hsl(205 69% 62%);
   --color-debug-text: hsl(205 69% 35%);
 
-  --color-thinking-mode: hsl(237 43% 60%);
-  --color-thinking-mode-light: hsl(237 43% 70%);
-  --color-thinking-border: hsl(237 43% 60%);
+  --color-thinking-mode: #6c71c4; /* violet */
+  --color-thinking-mode-light: #8589d0;
+  --color-thinking-border: #6c71c4;
+
+  /* Runtime icon colors - using solarized palette */
+  --color-runtime-ssh: #268bd2; /* blue */
+  --color-runtime-ssh-text: #268bd2;
+  --color-runtime-worktree: #6c71c4; /* violet */
+  --color-runtime-worktree-text: #6c71c4;
+  --color-runtime-local: #839496; /* base0 */
 
   /* Background & Layout - Solarized base colors */
   --color-background: #fdf6e3; /* base3 */
@@ -633,14 +654,15 @@
   --color-border-subtle: #93a1a1;
   --color-border-gray: #93a1a1;
 
-  --color-dark: #fdf6e3;
-  --color-darker: #eee8d5;
+  /* Three-zone backgrounds: sidebar (base2), workspace (base3), input (between) */
+  --color-dark: #fdf6e3; /* base3 - main workspace */
+  --color-darker: #eee8d5; /* base2 */
   --color-hover: #e5dfcc;
   --color-bg-medium: #ddd6c3;
   --color-bg-light: #d5ceb8;
   --color-bg-subtle: #eee8d5;
 
-  --color-separator: #eee8d5;
+  --color-separator: #eee8d5; /* base2 - sidebar background */
   --color-separator-light: #f5efdc;
   --color-modal-bg: #fdf6e3;
 
@@ -724,13 +746,26 @@
   --color-debug-light: hsl(205 69% 62%);
   --color-debug-text: hsl(205 69% 70%);
 
-  --color-thinking-mode: hsl(237 43% 60%);
-  --color-thinking-mode-light: hsl(237 43% 70%);
-  --color-thinking-border: hsl(237 43% 60%);
-
-  /* Background & Layout - Solarized dark base colors */
-  --color-background: #002b36; /* base03 */
-  --color-background-secondary: #073642; /* base02 */
+  --color-thinking-mode: #6c71c4; /* violet */
+  --color-thinking-mode-light: #8589d0;
+  --color-thinking-border: #6c71c4;
+
+  /* Runtime icon colors - using solarized palette */
+  --color-runtime-ssh: #268bd2; /* blue */
+  --color-runtime-ssh-text: #268bd2;
+  --color-runtime-worktree: #6c71c4; /* violet */
+  --color-runtime-worktree-text: #6c71c4;
+  --color-runtime-local: #839496; /* base0 */
+
+  /* Background & Layout - Solarized dark base colors
+     Palette reference:
+     base03 #002b36 (darkest)  base3  #fdf6e3 (lightest)
+     base02 #073642            base2  #eee8d5
+     base01 #586e75            base1  #93a1a1
+     base00 #657b83            base0  #839496
+  */
+  --color-background: #002b36; /* base03 - main background */
+  --color-background-secondary: #073642; /* base02 - secondary surfaces */
   --color-border: #586e75; /* base01 */
   --color-foreground: #839496; /* base0 */
   --color-text: #839496;
@@ -838,15 +873,16 @@
   --color-border-subtle: #586e75;
   --color-border-gray: #586e75;
 
-  --color-dark: #002b36;
-  --color-darker: #00232d;
+  /* Three-zone backgrounds: sidebar (base02), workspace (base03), input (between) */
+  --color-dark: #001f29; /* slightly darker than base03 for workspace */
+  --color-darker: #001a22;
   --color-hover: #0a4555;
   --color-bg-medium: #0d5566;
   --color-bg-light: #106577;
   --color-bg-subtle: #073642;
 
-  --color-separator: #073642;
-  --color-separator-light: #0a4555;
+  --color-separator: #073642; /* base02 - sidebar background */
+  --color-separator-light: #094555; /* slightly lighter for hover states */
   --color-modal-bg: #073642;
 
   --color-accent: #268bd2; /* blue */
@@ -1594,7 +1630,7 @@ pre code {
   width: 12px;
   height: 12px;
   border-radius: 50%;
-  background: var(--thumb-bg, #606060);
+  background: var(--thumb-bg, var(--color-muted));
   cursor: pointer;
   transition:
     background 0.2s ease,
@@ -1606,7 +1642,7 @@ pre code {
   width: 12px;
   height: 12px;
   border-radius: 50%;
-  background: var(--thumb-bg, #606060);
+  background: var(--thumb-bg, var(--color-muted));
   cursor: pointer;
   border: none;
   transition: