Shadcnui React Form with Zod: The error messages are not displaying correctly

I created a Next.js app following the ShadCN UI documentation: https://ui.shadcn.com/docs/installation/next. I'm using Tailwind v4 and now I want to add a form with Zod, so I followed this documentation: https://ui.shadcn.com/docs/components/form.

Here's my code (a direct copy from the documentation):

"use client";

import { zodResolver } from "@hookform/resolvers/zod";
import { useForm } from "react-hook-form";
import { z } from "zod";

import { Button } from "@/components/ui/button";
import {
  Form,
  FormControl,
  FormDescription,
  FormField,
  FormItem,
  FormLabel,
  FormMessage,
} from "@/components/ui/form";
import { Input } from "@/components/ui/input";

const FormSchema = z.object({
  username: z.string().min(2, {
    message: "Username must be at least 2 characters.",
  }),
});

export default function InputForm() {
  const form = useForm<z.infer<typeof FormSchema>>({
    resolver: zodResolver(FormSchema),
    defaultValues: {
      username: "",
    },
  });

  function onSubmit(data: z.infer<typeof FormSchema>) {
    console.log(data);
  }

  return (
    <Form {...form}>
      <form onSubmit={form.handleSubmit(onSubmit)} className="w-2/3 space-y-6">
        <FormField
          control={form.control}
          name="username"
          render={({ field }) => (
            <FormItem>
              <FormLabel>Username</FormLabel>
              <FormControl>
                <Input placeholder="shadcn" {...field} />
              </FormControl>
              <FormDescription>
                This is your public display name.
              </FormDescription>
              <FormMessage />
            </FormItem>
          )}
        />
        <Button type="submit">Submit</Button>
      </form>
    </Form>
  );
}

However, the error messages aren't displaying correctly:

The label disappears. The error message isn't shown in red. Here’s my global.css:

@import "tailwindcss";

@plugin "tailwindcss-animate";

@custom-variant dark (&:is(.dark *));

@theme {
  --font-sans: var(--font-geist-sans);
  --font-mono: var(--font-geist-mono);
}

:root {
  --background: hsl(0 0% 100%);
  --foreground: hsl(0 0% 3.9%);
  --card: hsl(0 0% 100%);
  --card-foreground: hsl(0 0% 3.9%);
  --popover: hsl(0 0% 100%);
  --popover-foreground: hsl(0 0% 3.9%);
  --primary: hsl(0 0% 9%);
  --primary-foreground: hsl(0 0% 98%);
  --secondary: hsl(0 0% 96.1%);
  --secondary-foreground: hsl(0 0% 9%);
  --muted: hsl(0 0% 96.1%);
  --muted-foreground: hsl(0 0% 45.1%);
  --accent: hsl(0 0% 96.1%);
  --accent-foreground: hsl(0 0% 9%);
  --destructive: hsl(0 84.2% 60.2%);
  --destructive-foreground: hsl(0 0% 98%);
  --border: hsl(0 0% 89.8%);
  --input: hsl(0 0% 89.8%);
  --ring: hsl(0 0% 3.9%);
  --chart-1: hsl(12 76% 61%);
  --chart-2: hsl(173 58% 39%);
  --chart-3: hsl(197 37% 24%);
  --chart-4: hsl(43 74% 66%);
  --chart-5: hsl(27 87% 67%);
  --radius: 0.6rem;
}

.dark {
  --background: hsl(0 0% 3.9%);
  --foreground: hsl(0 0% 98%);
  --card: hsl(0 0% 3.9%);
  --card-foreground: hsl(0 0% 98%);
  --popover: hsl(0 0% 3.9%);
  --popover-foreground: hsl(0 0% 98%);
  --primary: hsl(0 0% 98%);
  --primary-foreground: hsl(0 0% 9%);
  --secondary: hsl(0 0% 14.9%);
  --secondary-foreground: hsl(0 0% 98%);
  --muted: hsl(0 0% 14.9%);
  --muted-foreground: hsl(0 0% 63.9%);
  --accent: hsl(0 0% 14.9%);
  --accent-foreground: hsl(0 0% 98%);
  --destructive: hsl(0 62.8% 30.6%);
  --destructive-foreground: hsl(0 0% 98%);
  --border: hsl(0 0% 14.9%);
  --input: hsl(0 0% 14.9%);
  --ring: hsl(0 0% 83.1%);
  --chart-1: hsl(220 70% 50%);
  --chart-2: hsl(160 60% 45%);
  --chart-3: hsl(30 80% 55%);
  --chart-4: hsl(280 65% 60%);
  --chart-5: hsl(340 75% 55%);
}

@theme inline {
  --color-background: var(--background);
  --color-foreground: var(--foreground);
  --color-card: var(--card);
  --color-card-foreground: var(--card-foreground);
  --color-popover: var(--popover);
  --color-popover-foreground: var(--popover-foreground);
  --color-primary: var(--primary);
  --color-primary-foreground: var(--primary-foreground);
  --color-secondary: var(--secondary);
  --color-secondary-foreground: var(--secondary-foreground);
  --color-muted: var(--muted);
  --color-muted-foreground: var(--muted-foreground);
  --color-accent: var(--accent);
  --color-accent-foreground: var(--accent-foreground);
  --color-destructive: var(--destructive);
  --color-destructive-foreground: var(--destructive-foreground);
  --color-border: var(--border);
  --color-input: var(--input);
  --color-ring: var(--ring);
  --color-chart-1: var(--chart-1);
  --color-chart-2: var(--chart-2);
  --color-chart-3: var(--chart-3);
  --color-chart-4: var(--chart-4);
  --color-chart-5: var(--chart-5);
  --radius-sm: calc(var(--radius) - 4px);
  --radius-md: calc(var(--radius) - 2px);
  --radius-lg: var(--radius);
  --radius-xl: calc(var(--radius) + 4px);
  --animate-spinner-leaf-fade: spinner-leaf-fade 800ms linear infinite;

  @keyframes spinner-leaf-fade {
    0%,
    100% {
      opacity: 0;
    }
    50% {
      opacity: 1;
    }
  }
  --animate-accordion-down: accordion-down 0.2s ease-out;
  --animate-accordion-up: accordion-up 0.2s ease-out;

  @keyframes accordion-down {
    from {
      height: 0;
    }
    to {
      height: var(--radix-accordion-content-height);
    }
  }

  @keyframes accordion-up {
    from {
      height: var(--radix-accordion-content-height);
    }
    to {
      height: 0;
    }
  }
}

@layer base {
  * {
    @apply border-border outline-ring/50;
  }
  html {
    @apply scroll-smooth;
  }
  body {
    @apply bg-background text-foreground;
  }
  button {
    @apply cursor-pointer;
  }
}

My package.json

{
  "name": "share-pictures",
  "version": "0.1.0",
  "private": true,
  "scripts": {
    "dev": "next dev --turbopack",
    "build": "next build",
    "start": "next start",
    "lint": "next lint"
  },
  "dependencies": {
    "@hookform/resolvers": "^4.1.3",
    "@motionone/utils": "^10.18.0",
    "@prisma/client": "^6.4.0",
    "@radix-ui/react-accordion": "^1.2.3",
    "@radix-ui/react-dialog": "^1.1.6",
    "@radix-ui/react-icons": "^1.3.2",
    "@radix-ui/react-label": "^2.1.2",
    "@radix-ui/react-navigation-menu": "^1.2.5",
    "@radix-ui/react-radio-group": "^1.2.3",
    "@radix-ui/react-scroll-area": "^1.2.3",
    "@radix-ui/react-separator": "^1.1.2",
    "@radix-ui/react-slot": "^1.1.2",
    "@supabase/auth-helpers-nextjs": "^0.10.0",
    "@supabase/supabase-js": "^2.48.1",
    "canvas-confetti": "^1.9.3",
    "class-variance-authority": "^0.7.1",
    "clsx": "^2.1.1",
    "framer-motion": "^12.4.7",
    "lucide-react": "^0.475.0",
    "next": "15.2.0-canary.65",
    "next-themes": "^0.4.4",
    "prisma": "^6.4.0",
    "react": "^19.0.0",
    "react-dom": "^19.0.0",
    "react-hook-form": "^7.54.2",
    "react-responsive-masonry": "^2.7.1",
    "stripe": "^17.6.0",
    "tailwind-merge": "^3.0.1",
    "tailwindcss-animate": "^1.0.7",
    "zod": "^3.24.2"
  },
  "devDependencies": {
    "@eslint/eslintrc": "^3",
    "@tailwindcss/postcss": "^4",
    "@types/canvas-confetti": "^1.9.0",
    "@types/node": "^20",
    "@types/react": "^19",
    "@types/react-dom": "^19",
    "@types/react-responsive-masonry": "^2.6.0",
    "eslint": "^9",
    "eslint-config-next": "15.2.0-canary.65",
    "tailwindcss": "^4",
    "typescript": "^5"
  }
}

Am I missing something in my app or configuration?

Thanks!

The text-destructive class would normally mean red as the default color for the error message. Without reproduction, I don't really understand why you have the text-destructive-foreground class added to the error message. Maybe: shadcn-ui/new-york-v4/ui/form.tsx #L150

.text-destructive {
  --tw-text-opacity: 1;
  color: hsl(var(--destructive) / var(--tw-text-opacity));
}
.text-destructive-foreground {
  --tw-text-opacity: 1;
  color: hsl(var(--destructive-foreground) / var(--tw-text-opacity));
}

However, you set the --destructive-foreground CSS variable to hsl(0,0,98%), which is #fafafa (a shade of gray), causing the text color to appear gray.

I don't understand the background color; maybe you selected it with the cursor, which could be misleading.

So you need to change the value of text-destructive-foreground if the error message gets its text color from this class.

:root {
  --destructive-foreground: hsl(0 62.8% 30.6%);
}

Temporary Color Fix in FormMessage

Due to the class name change in PR #6693 (form.tsx line 150) (what mentioned in issue #6832), the FormMessage text color is now set by text-destructive-foreground instead of text-destructive. This is likely a bug and will probably be fixed. In the meantime, you can temporarily set the FormMessage text color to red like this:

p[data-slot="form-message"].text-destructive-foreground {
  --destructive-foreground: hsl(0 62.8% 30.6%);
}

This way, in all other cases, text-destructive-foreground will remain the gray color you set (hsl(0, 0%, 98%)), while in FormMessage, it will appear red.