diff --git a/app/scenes/CollectionEdit.tsx b/app/scenes/CollectionEdit.tsx
index 47cc6895fb..3ddbdadcb6 100644
--- a/app/scenes/CollectionEdit.tsx
+++ b/app/scenes/CollectionEdit.tsx
@@ -3,6 +3,7 @@ import { observer } from "mobx-react";
 import { useState } from "react";
 import * as React from "react";
 import { Trans, useTranslation } from "react-i18next";
+import { MAX_TITLE_LENGTH } from "@shared/constants";
 import Button from "~/components/Button";
 import Flex from "~/components/Flex";
 import IconPicker from "~/components/IconPicker";
@@ -93,6 +94,7 @@ const CollectionEdit = ({ collectionId, onSubmit }: Props) => {
             type="text"
             label={t("Name")}
             onChange={handleNameChange}
+            maxLength={MAX_TITLE_LENGTH}
             value={name}
             required
             autoFocus
diff --git a/app/scenes/CollectionNew.tsx b/app/scenes/CollectionNew.tsx
index bbe7289e38..ce20cbbf10 100644
--- a/app/scenes/CollectionNew.tsx
+++ b/app/scenes/CollectionNew.tsx
@@ -3,6 +3,7 @@ import { observable } from "mobx";
 import { observer } from "mobx-react";
 import * as React from "react";
 import { withTranslation, Trans, WithTranslation } from "react-i18next";
+import { MAX_TITLE_LENGTH } from "@shared/constants";
 import RootStore from "~/stores/RootStore";
 import Collection from "~/models/Collection";
 import Button from "~/components/Button";
@@ -127,6 +128,7 @@ class CollectionNew extends React.Component<Props> {
             type="text"
             label={t("Name")}
             onChange={this.handleNameChange}
+            maxLength={MAX_TITLE_LENGTH}
             value={this.name}
             required
             autoFocus
diff --git a/server/models/Collection.ts b/server/models/Collection.ts
index 595f6d29f1..a8339ef305 100644
--- a/server/models/Collection.ts
+++ b/server/models/Collection.ts
@@ -20,6 +20,7 @@ import {
   DataType,
 } from "sequelize-typescript";
 import isUUID from "validator/lib/isUUID";
+import { MAX_TITLE_LENGTH } from "@shared/constants";
 import { sortNavigationNodes } from "@shared/utils/collections";
 import { SLUG_URL_REGEX } from "@shared/utils/urlHelpers";
 import slugify from "@server/utils/slugify";
@@ -33,6 +34,8 @@ import Team from "./Team";
 import User from "./User";
 import ParanoidModel from "./base/ParanoidModel";
 import Fix from "./decorators/Fix";
+import IsHexColor from "./validators/IsHexColor";
+import Length from "./validators/Length";
 import NotContainsUrl from "./validators/NotContainsUrl";
 
 // without this indirection, the app crashes on starup
@@ -133,18 +136,35 @@ class Collection extends ParanoidModel {
   urlId: string;
 
   @NotContainsUrl
+  @Length({
+    max: MAX_TITLE_LENGTH,
+    msg: `Collection name must be less than ${MAX_TITLE_LENGTH} characters`,
+  })
   @Column
   name: string;
 
+  @Length({
+    max: 1000,
+    msg: `Collection description must be less than 1000 characters`,
+  })
   @Column
   description: string;
 
+  @Length({
+    max: 50,
+    msg: `Collection icon must be less than 50 characters`,
+  })
   @Column
   icon: string | null;
 
+  @IsHexColor
   @Column
   color: string | null;
 
+  @Length({
+    max: 50,
+    msg: `Collection index must be less than 50 characters`,
+  })
   @Column
   index: string | null;
 
diff --git a/server/models/Document.ts b/server/models/Document.ts
index a75f15ee68..fddfea5df5 100644
--- a/server/models/Document.ts
+++ b/server/models/Document.ts
@@ -188,7 +188,6 @@ class Document extends ParanoidModel {
   urlId: string;
 
   @Length({
-    min: 0,
     max: MAX_TITLE_LENGTH,
     msg: `Document title must be less than ${MAX_TITLE_LENGTH} characters`,
   })
diff --git a/server/models/User.ts b/server/models/User.ts
index 727483200f..3fd7490ef5 100644
--- a/server/models/User.ts
+++ b/server/models/User.ts
@@ -84,21 +84,17 @@ export enum UserFlag {
 @Fix
 class User extends ParanoidModel {
   @IsEmail
-  @Length({ min: 0, max: 255, msg: "email must be less than 255 characters" })
+  @Length({ max: 255, msg: "User email must be less than 255 characters" })
   @Column
   email: string | null;
 
   @NotContainsUrl
-  @Length({
-    min: 0,
-    max: 255,
-    msg: "username must be less than 255 characters",
-  })
+  @Length({ max: 255, msg: "User username must be less than 255 characters" })
   @Column
   username: string | null;
 
   @NotContainsUrl
-  @Length({ min: 0, max: 255, msg: "name must be less than 255 characters" })
+  @Length({ max: 255, msg: "User name must be less than 255 characters" })
   @Column
   name: string;
 
diff --git a/server/models/WebhookSubscription.ts b/server/models/WebhookSubscription.ts
index f212dc49a9..84fb1e9809 100644
--- a/server/models/WebhookSubscription.ts
+++ b/server/models/WebhookSubscription.ts
@@ -22,13 +22,13 @@ import Length from "./validators/Length";
 @Fix
 class WebhookSubscription extends ParanoidModel {
   @NotEmpty
-  @Length({ min: 0, max: 255, msg: "Must be less than 255 characters" })
+  @Length({ max: 255, msg: "Webhook name be less than 255 characters" })
   @Column
   name: string;
 
   @IsUrl
   @NotEmpty
-  @Length({ min: 0, max: 255, msg: "Must be less than 255 characters" })
+  @Length({ max: 255, msg: "Webhook url be less than 255 characters" })
   @Column
   url: string;
 
diff --git a/server/models/validators/IsHexColor.ts b/server/models/validators/IsHexColor.ts
new file mode 100644
index 0000000000..0a2b2eb58e
--- /dev/null
+++ b/server/models/validators/IsHexColor.ts
@@ -0,0 +1,17 @@
+import { isHexColor } from "class-validator";
+import { addAttributeOptions } from "sequelize-typescript";
+
+/**
+ * A decorator that validates that a string is a valid hex color code.
+ */
+export default function IsHexColor(target: any, propertyName: string) {
+  return addAttributeOptions(target, propertyName, {
+    validate: {
+      validDomain(value: string) {
+        if (!isHexColor(value)) {
+          throw new Error("Must be a valid hex color code");
+        }
+      },
+    },
+  });
+}
diff --git a/server/models/validators/Length.ts b/server/models/validators/Length.ts
index a4773ae0cb..a36ff66521 100644
--- a/server/models/validators/Length.ts
+++ b/server/models/validators/Length.ts
@@ -7,11 +7,11 @@ import { addAttributeOptions } from "sequelize-typescript";
  */
 export default function Length({
   msg,
-  min,
+  min = 0,
   max,
 }: {
   msg?: string;
-  min: number;
+  min?: number;
   max: number;
 }): (target: any, propertyName: string) => void {
   return (target: any, propertyName: string) =>