Add NativeColorType opaque type to normalizeColor() ahead of PlatformColor PR.

Libraries/ActionSheetIOS/ActionSheetIOS.js

@@ -65,10 +65,15 @@ const ActionSheetIOS = {
       destructiveButtonIndices = [destructiveButtonIndex];
     }
 
+    const processedTintColor = processColor(tintColor);
+    invariant(
+      processedTintColor == null || typeof processedTintColor === 'number',
+      'Unexpected color given for ActionSheetIOS.showActionSheetWithOptions tintColor',
+    );
     RCTActionSheetManager.showActionSheetWithOptions(
       {
         ...remainingOptions,
-        tintColor: processColor(tintColor),
+        tintColor: processedTintColor,
         destructiveButtonIndices,
       },
       callback,

Libraries/Components/CheckBox/CheckBox.android.js

@@ -12,6 +12,7 @@
 
 const React = require('react');
 const StyleSheet = require('../../StyleSheet/StyleSheet');
+const invariant = require('invariant');
 const processColor = require('../../StyleSheet/processColor');
 
 const nullthrows = require('nullthrows');
@@ -152,12 +153,26 @@ class CheckBox extends React.Component<Props> {
   };
 
   _getTintColors(tintColors) {
-    return tintColors
-      ? {
-          true: processColor(tintColors.true),
-          false: processColor(tintColors.false),
-        }
-      : undefined;
+    if (tintColors) {
+      const processedTextColorTrue = processColor(tintColors.true);
+      invariant(
+        processedTextColorTrue == null ||
+          typeof processedTextColorTrue === 'number',
+        'Unexpected color given for tintColors.true',
+      );
+      const processedTextColorFalse = processColor(tintColors.true);
+      invariant(
+        processedTextColorFalse == null ||
+          typeof processedTextColorFalse === 'number',
+        'Unexpected color given for tintColors.false',
+      );
+      return {
+        true: processedTextColorTrue,
+        false: processedTextColorFalse,
+      };
+    } else {
+      return undefined;
+    }
   }
 
   render() {

Libraries/Components/Picker/PickerAndroid.android.js

@@ -18,6 +18,7 @@ import AndroidDialogPickerNativeComponent, {
 } from './AndroidDialogPickerNativeComponent';
 import * as React from 'react';
 import StyleSheet from '../../StyleSheet/StyleSheet';
+import invariant from 'invariant';
 import processColor from '../../StyleSheet/processColor';
 
 import type {SyntheticEvent} from '../../Types/CoreEventTypes';
@@ -61,8 +62,13 @@ function PickerAndroid(props: Props): React.Node {
         selected = index;
       }
       const {color, label} = child.props;
+      const processedColor = processColor(color);
+      invariant(
+        processedColor == null || typeof processedColor === 'number',
+        'Unexpected color given for PickerAndroid color prop',
+      );
       return {
-        color: color == null ? null : processColor(color),
+        color: color == null ? null : processedColor,
         label,
       };
     });

Libraries/Components/Picker/PickerIOS.ios.js

@@ -16,6 +16,7 @@ const React = require('react');
 const StyleSheet = require('../../StyleSheet/StyleSheet');
 const View = require('../View/View');
 
+const invariant = require('invariant');
 const processColor = require('../../StyleSheet/processColor');
 
 import RCTPickerNativeComponent, {
@@ -86,10 +87,15 @@ class PickerIOS extends React.Component<Props, State> {
         if (child.props.value === props.selectedValue) {
           selectedIndex = index;
         }
+        const processedTextColor = processColor(child.props.color);
+        invariant(
+          processedTextColor == null || typeof processedTextColor === 'number',
+          'Unexpected color given for PickerIOSItem color',
+        );
         items.push({
           value: child.props.value,
           label: child.props.label,
-          textColor: processColor(child.props.color),
+          textColor: processedTextColor,
         });
       });
     return {selectedIndex, items};

Libraries/Components/StatusBar/StatusBar.js

@@ -13,6 +13,7 @@
 const Platform = require('../../Utilities/Platform');
 const React = require('react');
 
+const invariant = require('invariant');
 const processColor = require('../../StyleSheet/processColor');
 
 import NativeStatusBarManagerAndroid from './NativeStatusBarManagerAndroid';
@@ -322,6 +323,10 @@ class StatusBar extends React.Component<Props> {
       );
       return;
     }
+    invariant(
+      typeof processedColor === 'number',
+      'Unexpected color given for StatusBar.setBackgroundColor',
+    );
 
     NativeStatusBarManagerAndroid.setColor(processedColor, animated);
   }
@@ -466,6 +471,10 @@ class StatusBar extends React.Component<Props> {
             } parsed to null or undefined`,
           );
         } else {
+          invariant(
+            typeof processedColor === 'number',
+            'Unexpected color given in StatusBar._updatePropsStack',
+          );
           NativeStatusBarManagerAndroid.setColor(
             processedColor,
             mergedProps.backgroundColor.animated,

Libraries/Components/Touchable/TouchableNativeFeedback.js

@@ -23,6 +23,7 @@ import Platform from '../../Utilities/Platform';
 import View from '../../Components/View/View';
 import processColor from '../../StyleSheet/processColor';
 import * as React from 'react';
+import invariant from 'invariant';
 
 type Props = $ReadOnly<{|
   ...React.ElementConfig<TouchableWithoutFeedback>,
@@ -131,11 +132,18 @@ class TouchableNativeFeedback extends React.Component<Props, State> {
     borderless: boolean,
     color: ?number,
     type: 'RippleAndroid',
-  |}> = (color: string, borderless: boolean) => ({
-    type: 'RippleAndroid',
-    color: processColor(color),
-    borderless,
-  });
+  |}> = (color: string, borderless: boolean) => {
+    const processedColor = processColor(color);
+    invariant(
+      processedColor == null || typeof processedColor === 'number',
+      'Unexpected color given for Ripple color',
+    );
+    return {
+      type: 'RippleAndroid',
+      color: processedColor,
+      borderless,
+    };
+  };
 
   /**
    * Whether `useForeground` is supported.

Libraries/Share/Share.js

@@ -109,6 +109,11 @@ class Share {
       return new Promise((resolve, reject) => {
         const tintColor = processColor(options.tintColor);
 
+        invariant(
+          tintColor == null || typeof tintColor === 'number',
+          'Unexpected color given for options.tintColor',
+        );
+
         invariant(
           NativeActionSheetManager,
           'NativeActionSheetManager is not registered on iOS, but it should be.',

Libraries/StyleSheet/processColor.js

@@ -14,8 +14,15 @@ const Platform = require('../Utilities/Platform');
 
 const normalizeColor = require('./normalizeColor');
 
+// TODO: This is an empty object for now, just to enforce that everything using this
+// downstream is correct. This will be replaced with an import to other files
+// with a platform specific implementation. See the PR for more information
+// https://github.com/facebook/react-native/pull/27908
+opaque type NativeColorType = {};
+export type ProcessedColorValue = ?number | NativeColorType;
+
 /* eslint no-bitwise: 0 */
-function processColor(color?: ?(string | number)): ?number {
+function processColor(color?: ?(string | number)): ProcessedColorValue {
   if (color === undefined || color === null) {
     return color;
   }

Libraries/StyleSheet/processColorArray.js

@@ -11,8 +11,11 @@
 'use strict';
 
 const processColor = require('./processColor');
+import type {ProcessedColorValue} from './processColor';
 
-function processColorArray(colors: ?Array<string>): ?Array<?number> {
+function processColorArray(
+  colors: ?Array<string>,
+): ?Array<ProcessedColorValue> {
   return colors == null ? null : colors.map(processColor);
 }