diff --git a/.changeset/hungry-singers-fry.md b/.changeset/hungry-singers-fry.md
new file mode 100644
index 0000000000..7b77706c35
--- /dev/null
+++ b/.changeset/hungry-singers-fry.md
@@ -0,0 +1,5 @@
+---
+"@digdir/designsystemet": patch
+---
+
+Invalidate system colors as color names (success, danger, warning, info, blue, green, orange, red, purple)
diff --git a/apps/theme/components/OverviewComponents/TableCard/TableCard.tsx b/apps/theme/components/OverviewComponents/TableCard/TableCard.tsx
index 966f94c44c..dc4d4fba9f 100644
--- a/apps/theme/components/OverviewComponents/TableCard/TableCard.tsx
+++ b/apps/theme/components/OverviewComponents/TableCard/TableCard.tsx
@@ -51,7 +51,7 @@ export const TableCard = () => {
           </Search>
         </div>
       </div>
-      <Table data-size='sm' border>
+      <Table data-size='sm' border data-color='neutral'>
         <Table.Head>
           <Table.Row>
             <Table.HeaderCell onClick={function Ya() {}} sort='none'>
diff --git a/apps/theme/components/Sidebar/ColorPane/ColorPane.tsx b/apps/theme/components/Sidebar/ColorPane/ColorPane.tsx
index 0684cadbd3..4bfa443d66 100644
--- a/apps/theme/components/Sidebar/ColorPane/ColorPane.tsx
+++ b/apps/theme/components/Sidebar/ColorPane/ColorPane.tsx
@@ -1,3 +1,4 @@
+import { RESERVED_COLORS } from '@digdir/designsystemet';
 import {
   Button,
   Heading,
@@ -10,6 +11,7 @@ import { ColorPicker, type IColor } from 'react-color-palette';
 import { useThemeStore } from '../../../store';
 
 import cl from 'clsx/lite';
+import { useState } from 'react';
 import classes from './ColorPane.module.css';
 
 type ColorPaneProps = {
@@ -38,6 +40,8 @@ export const ColorPane = ({
   colorType,
 }: ColorPaneProps) => {
   const mainColors = useThemeStore((state) => state.colors.main);
+  const [colorError, setColorError] = useState('');
+
   const disableRemoveButton = colorType === 'main' && mainColors.length === 1;
 
   const getHeading = () => {
@@ -45,6 +49,27 @@ export const ColorPane = ({
     return type === 'addColor' ? 'Legg til ' + t : 'Rediger farge';
   };
 
+  const checkNameIsValid = () => {
+    if (name === '') {
+      setColorError('Navnet på fargen kan ikke være tomt');
+      return false;
+    }
+
+    if (RESERVED_COLORS.includes(name.toLowerCase())) {
+      setColorError(
+        'Navnet på fargen kan ikke være det samme som våre systemfarger',
+      );
+      return false;
+    }
+    setColorError('');
+    return true;
+  };
+
+  const closeTab = () => {
+    setColorError('');
+    onClose();
+  };
+
   return (
     <div
       className={cl(classes.colorPage, type.includes('Color') && classes.show)}
@@ -53,7 +78,7 @@ export const ColorPane = ({
         <Button
           data-size='sm'
           variant='tertiary'
-          onClick={() => onClose()}
+          onClick={closeTab}
           className={classes.back}
         >
           <ChevronLeftIcon title='a11y-title' fontSize='1.5rem' /> Gå tilbake
@@ -102,6 +127,8 @@ export const ColorPane = ({
               .toLowerCase();
             setName(value);
           }}
+          onBlur={checkNameIsValid}
+          error={colorError}
         />
       )}
       <div className={classes.label}>Farge</div>
@@ -122,6 +149,8 @@ export const ColorPane = ({
           data-size='sm'
           color='neutral'
           onClick={() => {
+            /* Check here as well to disable sending new color */
+            if (!checkNameIsValid()) return;
             onPrimaryClicked(color.hex, name);
           }}
         >
@@ -132,9 +161,7 @@ export const ColorPane = ({
           data-size='sm'
           color='neutral'
           variant='secondary'
-          onClick={() => {
-            onClose();
-          }}
+          onClick={closeTab}
         >
           Avbryt
         </Button>
diff --git a/packages/cli/bin/config.ts b/packages/cli/bin/config.ts
index d2e2f0f87f..dca0585e85 100644
--- a/packages/cli/bin/config.ts
+++ b/packages/cli/bin/config.ts
@@ -1,6 +1,7 @@
 import * as R from 'ramda';
 import { z } from 'zod';
 import { convertToHex } from '../src/colors/index.js';
+import { RESERVED_COLORS } from '../src/colors/theme.js';
 import { cliOptions } from '../src/tokens/create.js';
 
 export function mapPathToOptionName(path: (string | number)[]) {
@@ -20,14 +21,31 @@ const hexPatterns = [
   `#[0-9a-fA-F]{6}`,
   `#[0-9a-fA-F]{8}`,
 ];
+const reservedColorsPattern = `^(?!(?:${RESERVED_COLORS.join('|')})$)`;
 
 export const colorRegex = new RegExp(`^${hexPatterns.join('|')}$`);
 
 const colorSchema = z
-  .string({ description: 'A hex color, which is used for creating a color scale' })
+  .string({
+    description: `A hex color, which is used for creating a color scale. Invalid color names: ${RESERVED_COLORS.join(', ')}`,
+  })
   .regex(colorRegex)
   .transform(convertToHex);
-const colorCategorySchema = z.record(colorSchema, { description: 'One or more color definitions' });
+
+const colorCategorySchema = z
+  .record(
+    z.string().regex(new RegExp(reservedColorsPattern, 'i'), {
+      message: `Color names cannot include reserved names: ${RESERVED_COLORS.join(', ')}`,
+    }),
+    colorSchema,
+    {
+      description: 'One or more color definitions',
+      invalid_type_error: 'Color definitions must be hex color values',
+    },
+  )
+  .refine((colors) => !Object.keys(colors).some((key) => RESERVED_COLORS.includes(key.toLowerCase())), {
+    message: `Color names cannot include reserved names: ${RESERVED_COLORS.join(', ')}`,
+  });
 
 const themeSchema = z.object(
   {
diff --git a/packages/cli/src/colors/theme.ts b/packages/cli/src/colors/theme.ts
index 4bd163ca1f..419c21528d 100644
--- a/packages/cli/src/colors/theme.ts
+++ b/packages/cli/src/colors/theme.ts
@@ -5,6 +5,19 @@ import type { CssColor } from './types.js';
 import type { Color, ColorNumber, ColorScheme, ThemeInfo } from './types.js';
 import { getLightnessFromHex, getLuminanceFromLightness } from './utils.js';
 
+export const RESERVED_COLORS = [
+  'neutral',
+  'success',
+  'warning',
+  'danger',
+  'info',
+  'blue',
+  'green',
+  'orange',
+  'purple',
+  'red',
+];
+
 /**
  * Generates a color scale based on a base color and a color mode.
  *