diff --git a/src/cache.ts b/src/cache.ts
index 6200291..bd6fdc9 100644
--- a/src/cache.ts
+++ b/src/cache.ts
@@ -2,6 +2,7 @@ import * as ts from "typescript";
 import * as graph from "graphlib";
 import * as hash from "object-hash";
 import * as _ from "lodash";
+import * as colors from "colors/safe";
 import { RollingCache } from "./rollingcache";
 
 export interface ICode
@@ -158,7 +159,7 @@ export class Cache
 			let dirty = l === undefined ? true : l.dirty;
 
 			if (dirty)
-				console.log(`dirty: ${id} -> ${node}`.gray);
+				console.log(colors.gray(`dirty: ${id} -> ${node}`));
 
 			return dirty;
 		});
@@ -176,13 +177,13 @@ export class Cache
 		{
 			let entry: IDiagnostics =
 			{
-				flatMessage: ts.flattenDiagnosticMessageText(diagnostic.messageText, "\n").yellow,
+				flatMessage: ts.flattenDiagnosticMessageText(diagnostic.messageText, "\n"),
 			};
 
 			if (diagnostic.file)
 			{
 				let { line, character } = diagnostic.file.getLineAndCharacterOfPosition(diagnostic.start);
-				entry.fileLine = `${diagnostic.file.fileName} (${line + 1},${character + 1})`.white;
+				entry.fileLine = `${diagnostic.file.fileName} (${line + 1},${character + 1})`;
 			}
 
 			return entry;
diff --git a/src/index.ts b/src/index.ts
index defa952..363e62c 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -5,7 +5,7 @@ import { createFilter } from "rollup-pluginutils";
 import * as fs from "fs-extra";
 import * as path from "path";
 import * as _ from "lodash";
-import * as colors from "colors";
+import * as colors from "colors/safe";
 
 function getOptionsOverrides(): ts.CompilerOptions
 {
@@ -87,9 +87,9 @@ function printDiagnostics(diagnostics: IDiagnostics[])
 	_.each(diagnostics, (diagnostic) =>
 	{
 		if (diagnostic.fileLine)
-			console.log(`${diagnostic.fileLine}: ${diagnostic.flatMessage}`);
+			console.log(`${diagnostic.fileLine}: ${colors.yellow(diagnostic.flatMessage)}`);
 		else
-			console.log(diagnostic.flatMessage);
+			console.log(colors.yellow(diagnostic.flatMessage));
 	});
 };
 
@@ -160,7 +160,7 @@ export default function typescript (options: IOptions)
 				const output = services.getEmitOutput(id);
 
 				if (output.emitSkipped)
-					this.error({ message: `failed to transpile ${id}`});
+					this.error({ message: colors.red(`failed to transpile ${id}`)});
 
 				const transpiled = _.find(output.outputFiles, (entry: ts.OutputFile) => _.endsWith(entry.name, ".js") );
 				const map = _.find(output.outputFiles, (entry: ts.OutputFile) => _.endsWith(entry.name, ".map") );
@@ -184,7 +184,7 @@ export default function typescript (options: IOptions)
 
 				if (!snapshot)
 				{
-					console.log(`failed lo load snapshot for ${id}`);
+					console.log(colors.red(`failed lo load snapshot for ${id}`));
 					return;
 				}
 
diff --git a/src/rollingcache.ts b/src/rollingcache.ts
index 638ee8d..aab4340 100644
--- a/src/rollingcache.ts
+++ b/src/rollingcache.ts
@@ -1,11 +1,19 @@
 import * as fs from "fs-extra";
 import * as _ from "lodash";
 
+/**
+ * Saves data in new cache folder or reads it from old one.
+ * Avoids perpetually growing cache and situations when things need to consider changed and then reverted data to be changed.
+ */
 export class RollingCache <DataType>
 {
 	private oldCacheRoot: string;
 	private newCacheRoot: string;
 
+	/**
+	 * @param cacheRoot: root folder for the cache
+	 * @param checkNewCache: whether to also look in new cache when reading from cache
+	 */
 	constructor(private cacheRoot: string, private checkNewCache: boolean)
 	{
 		this.oldCacheRoot = `${this.cacheRoot}/cache`;
@@ -14,6 +22,9 @@ export class RollingCache <DataType>
 		fs.emptyDirSync(this.newCacheRoot);
 	}
 
+	/**
+	 * @returns true if name exist in old cache (or either old of new cache if checkNewCache is true)
+	 */
 	public exists(name: string): boolean
 	{
 		if (this.checkNewCache && fs.existsSync(`${this.newCacheRoot}/${name}`))
@@ -22,14 +33,20 @@ export class RollingCache <DataType>
 		return fs.existsSync(`${this.oldCacheRoot}/${name}`);
 	}
 
+	/**
+	 * @returns true if old cache contains all names and nothing more
+	 */
 	public match(names: string[]): boolean
 	{
 		if (!fs.existsSync(this.oldCacheRoot))
-			return false;
+			return names.length === 0; // empty folder matches
 
 		return _.isEqual(fs.readdirSync(this.oldCacheRoot).sort(), names.sort());
 	}
 
+	/**
+	 * @returns data for name, must exist in old cache (or either old of new cache if checkNewCache is true)
+	 */
 	public read(name: string): DataType
 	{
 		if (this.checkNewCache && fs.existsSync(`${this.newCacheRoot}/${name}`))
@@ -43,19 +60,28 @@ export class RollingCache <DataType>
 		if (data === undefined)
 			return;
 
-		fs.writeJson(`${this.newCacheRoot}/${name}`, data, { encoding: "utf8" }, () => {});
+		if (this.checkNewCache)
+			fs.writeJsonSync(`${this.newCacheRoot}/${name}`, data);
+		else // won't be reading it this run
+			fs.writeJson(`${this.newCacheRoot}/${name}`, data, { encoding: "utf8" }, () => { ; });
 	}
 
 	public touch(name: string)
 	{
-		fs.ensureFile(`${this.newCacheRoot}/${name}`, () => {});
+		if (this.checkNewCache)
+			fs.ensureFileSync(`${this.newCacheRoot}/${name}`);
+		else // won't be reading it this run
+			fs.ensureFile(`${this.newCacheRoot}/${name}`, () => { ; });
 	}
 
+	/**
+	 * clears old cache and moves new in its place
+	 */
 	public roll()
 	{
 		fs.remove(this.oldCacheRoot, () =>
 		{
-			fs.move(this.newCacheRoot, this.oldCacheRoot, () => {} );
+			fs.move(this.newCacheRoot, this.oldCacheRoot, () => { ; });
 		});
 	}
 }