diff --git a/src/PKPass.ts b/src/PKPass.ts
index b7e2b09..2e2432a 100644
--- a/src/PKPass.ts
+++ b/src/PKPass.ts
@@ -5,7 +5,7 @@ import * as Signature from "./Signature";
 import * as Strings from "./StringsUtils";
 import { getModelFolderContents } from "./parser";
 import { Stream } from "stream";
-import { isValidRGB, processDate } from "./utils";
+import { processDate } from "./utils";
 
 /** Exporting for tests specs */
 export const propsSymbol = Symbol("props");
@@ -516,30 +516,6 @@ export default class PKPass extends Bundle {
 	) {
 		const fileNames = Object.keys(this[filesSymbol]);
 
-		/**
-		 * Filtering colors props that have an
-		 * invalid RGB value
-		 */
-
-		const passColors = [
-			"backgroundColor",
-			"foregroundColor",
-			"labelColor",
-		] as Array<keyof Schemas.PassColors>;
-
-		for (let i = 0; i < passColors.length; i++) {
-			const colorProperty = passColors[i];
-			const colorInProps = this[propsSymbol][colorProperty];
-
-			if (colorInProps && !isValidRGB(colorInProps)) {
-				console.warn(
-					`'${colorProperty}' property has been removed from pass.json as it has not a valid RGB-string value.`,
-				);
-
-				delete this[propsSymbol][colorProperty];
-			}
-		}
-
 		const passJson = Buffer.from(JSON.stringify(this[propsSymbol]));
 		super.addBuffer("pass.json", passJson);
 
diff --git a/src/schemas/index.ts b/src/schemas/index.ts
index 78d60dd..a36fbc6 100644
--- a/src/schemas/index.ts
+++ b/src/schemas/index.ts
@@ -14,11 +14,13 @@ import { Barcode } from "./Barcodes";
 import { Location } from "./Location";
 import { Beacon } from "./Beacons";
 import { NFC } from "./NFC";
-import { Field } from "./PassFieldContent";
 import { PassFields, TransitType } from "./PassFields";
 import { Semantics } from "./SemanticTags";
 import { CertificatesSchema } from "./Certificates";
 
+const RGB_COLOR_REGEX =
+	/rgb\(\s*(?:[01]?[0-9][0-9]?|2[0-4][0-9]|25[0-5])\s*,\s*(?:[01]?[0-9][0-9]?|2[0-4][0-9]|25[0-5])\s*,\s*(?:[01]?[0-9][0-9]?|2[0-4][0-9]|25[0-5])\s*\)/;
+
 export interface FileBuffers {
 	[key: string]: Buffer;
 }
@@ -128,10 +130,10 @@ export const OverridablePassProps = Joi.object<OverridablePassProps>({
 	groupingIdentifier: Joi.string(),
 	suppressStripShine: Joi.boolean(),
 	maxDistance: Joi.number().positive(),
-	labelColor: Joi.string().min(10).max(16),
 	authenticationToken: Joi.string().min(16),
-	backgroundColor: Joi.string().min(10).max(16),
-	foregroundColor: Joi.string().min(10).max(16),
+	labelColor: Joi.string().regex(RGB_COLOR_REGEX),
+	backgroundColor: Joi.string().regex(RGB_COLOR_REGEX),
+	foregroundColor: Joi.string().regex(RGB_COLOR_REGEX),
 	associatedStoreIdentifiers: Joi.array().items(Joi.number()),
 	userInfo: Joi.alternatives(Joi.object().unknown(), Joi.array()),
 	// parsing url as set of words and nums followed by dots, optional port and any possible path after