diff --git a/packages/opencode/src/config/agent.ts b/packages/opencode/src/config/agent.ts
index a6719e86743a..57438f6f717e 100644
--- a/packages/opencode/src/config/agent.ts
+++ b/packages/opencode/src/config/agent.ts
@@ -38,7 +38,7 @@ const AgentSchema = Schema.StructWithRest(
       description: "Hide this subagent from the @ autocomplete menu (default: false, only applies to mode: subagent)",
     }),
     options: Schema.optional(Schema.Record(Schema.String, Schema.Any)),
-    color: Schema.optional(Color).annotate({
+    color: Schema.optional(Schema.NullOr(Color)).annotate({
       description: "Hex color code (e.g., #FF5733) or theme color (e.g., primary)",
     }),
     steps: Schema.optional(PositiveInt).annotate({
@@ -93,7 +93,9 @@ const normalize = (agent: Schema.Schema.Type<typeof AgentSchema>): Schema.Schema
   globalThis.Object.assign(permission, agent.permission)
 
   const steps = agent.steps ?? agent.maxSteps
-  return { ...agent, options, permission, ...(steps !== undefined ? { steps } : {}) }
+  const result = { ...agent, options, permission, ...(steps !== undefined ? { steps } : {}) }
+  if (result.color === null) delete result.color
+  return result
 }
 
 export const Info = AgentSchema.pipe(
diff --git a/packages/opencode/test/config/config.test.ts b/packages/opencode/test/config/config.test.ts
index 4d3ed45d2fc6..664229e23a1a 100644
--- a/packages/opencode/test/config/config.test.ts
+++ b/packages/opencode/test/config/config.test.ts
@@ -912,6 +912,44 @@ Nested agent prompt`,
   })
 })
 
+test("loads many agents when unquoted hex colors parse as null", async () => {
+  await using tmp = await tmpdir({
+    init: async (dir) => {
+      const agentsDir = path.join(dir, ".opencode", "agents")
+      await fs.mkdir(agentsDir, { recursive: true })
+
+      for (let i = 0; i < 184; i++) {
+        const name = `agent-${String(i).padStart(3, "0")}`
+        await Filesystem.write(
+          path.join(agentsDir, `${name}.md`),
+          `---
+name: ${name}
+description: Test agent
+mode: subagent
+color: #9B59B6
+---
+Agent prompt`,
+        )
+      }
+    },
+  })
+
+  await withTestInstance({
+    directory: tmp.path,
+    fn: async (ctx) => {
+      const config = await load(ctx)
+
+      expect(Object.keys(config.agent ?? {}).filter((name) => name.startsWith("agent-"))).toHaveLength(184)
+      expect(config.agent?.["agent-183"]).toMatchObject({
+        name: "agent-183",
+        mode: "subagent",
+        prompt: "Agent prompt",
+      })
+      expect(config.agent?.["agent-183"]?.color).toBeUndefined()
+    },
+  })
+})
+
 test("loads commands from .opencode/command (singular)", async () => {
   await using tmp = await tmpdir({
     init: async (dir) => {