diff --git a/libs/bluetooth/bluetooth.ts b/libs/bluetooth/bluetooth.ts
index 343f24ba..5c5ccd82 100644
--- a/libs/bluetooth/bluetooth.ts
+++ b/libs/bluetooth/bluetooth.ts
@@ -1,7 +1,7 @@
 /**
  * Support for additional Bluetooth services.
  */
-//% color=#0082FB weight=96 icon="\uf294"
+//% color=#007EF4 weight=96 icon="\uf294"
 namespace bluetooth {
     /**
     *  Writes to the Bluetooth UART service buffer. From there the data is transmitted over Bluetooth to a connected device.
diff --git a/libs/core/basic.cpp b/libs/core/basic.cpp
index e4eaf8f4..ef7f7783 100644
--- a/libs/core/basic.cpp
+++ b/libs/core/basic.cpp
@@ -4,7 +4,7 @@
 /**
  * Provides access to basic micro:bit functionality.
  */
-//% color=#0078D7 weight=116 icon="\uf00a"
+//% color=#1E90FF weight=116 icon="\uf00a"
 namespace basic {
 
     /**
diff --git a/libs/core/game.ts b/libs/core/game.ts
index d07b3d2a..e39b50a0 100644
--- a/libs/core/game.ts
+++ b/libs/core/game.ts
@@ -21,7 +21,7 @@ enum LedSpriteProperty {
 /**
  * A single-LED sprite game engine
  */
-//% color=#008272 weight=32 icon="\uf11b"
+//% color=#007A4B weight=32 icon="\uf11b"
 //% advanced=true
 namespace game {
     let _score: number = 0;
diff --git a/libs/core/images.cpp b/libs/core/images.cpp
index 309fcd9b..60d83c65 100644
--- a/libs/core/images.cpp
+++ b/libs/core/images.cpp
@@ -25,7 +25,7 @@ void RefMImage::makeWritable() {
 /**
  * Creation, manipulation and display of LED images.
  */
-//% color=#5C2D91 weight=31 icon="\uf03e"
+//% color=#7600A8 weight=31 icon="\uf03e"
 //% advanced=true
 namespace images {
 /**
diff --git a/libs/core/input.cpp b/libs/core/input.cpp
index 7cb54c4c..7b7dc524 100644
--- a/libs/core/input.cpp
+++ b/libs/core/input.cpp
@@ -158,7 +158,7 @@ enum class MesDpadButtonInfo {
     _4Up = MES_DPAD_BUTTON_4_UP,
 };
 
-//% color=#B4009E weight=111 icon="\uf192"
+//% color=#D400D4 weight=111 icon="\uf192"
 namespace input {
     /**
      * Do something when a button (A, B or both A+B) is pushed down and released again.
diff --git a/libs/core/led.cpp b/libs/core/led.cpp
index 0ae36e0b..5a5b9621 100644
--- a/libs/core/led.cpp
+++ b/libs/core/led.cpp
@@ -8,7 +8,7 @@ enum class DisplayMode_ {
     // TODO DISPLAY_MODE_BLACK_AND_WHITE_LIGHT_SENSE
 };
 
-//% color=#5C2D91 weight=101 icon="\uf205"
+//% color=#7600A8 weight=101 icon="\uf205"
 namespace led {
 
     /**
diff --git a/libs/core/music.ts b/libs/core/music.ts
index 56824087..38eec26d 100644
--- a/libs/core/music.ts
+++ b/libs/core/music.ts
@@ -163,7 +163,7 @@ enum MusicEvent {
 /**
  * Generation of music tones.
  */
-//% color=#D83B01 weight=106 icon="\uf025"
+//% color=#E63022 weight=106 icon="\uf025"
 namespace music {
     let beatsPerMinute: number = 120;
     let freqTable: number[] = [];
diff --git a/libs/core/pins.ts b/libs/core/pins.ts
index aee682d4..8182af1d 100644
--- a/libs/core/pins.ts
+++ b/libs/core/pins.ts
@@ -1,7 +1,7 @@
 /**
  * Control currents in Pins for analog/digital signals, servos, i2c, ...
  */
-//% color=#A80000 weight=30 icon="\uf140"
+//% color=#B22222 weight=30 icon="\uf140"
 //% advanced=true
 namespace pins {
     /**
diff --git a/libs/core/shims.d.ts b/libs/core/shims.d.ts
index cdba8f02..59ae620b 100644
--- a/libs/core/shims.d.ts
+++ b/libs/core/shims.d.ts
@@ -4,7 +4,7 @@
     /**
      * Creation, manipulation and display of LED images.
      */
-    //% color=#5C2D91 weight=31 icon="\uf03e"
+    //% color=#7600A8 weight=31 icon="\uf03e"
     //% advanced=true
 declare namespace images {
 
@@ -127,7 +127,7 @@ declare interface Image {
     /**
      * Provides access to basic micro:bit functionality.
      */
-    //% color=#0078D7 weight=116 icon="\uf00a"
+    //% color=#1E90FF weight=116 icon="\uf00a"
 declare namespace basic {
 
     /**
@@ -203,7 +203,7 @@ declare namespace basic {
 
 
 
-    //% color=#B4009E weight=111 icon="\uf192"
+    //% color=#D400D4 weight=111 icon="\uf192"
 declare namespace input {
 
     /**
@@ -435,7 +435,7 @@ declare namespace control {
 
 
 
-    //% color=#5C2D91 weight=101 icon="\uf205"
+    //% color=#7600A8 weight=101 icon="\uf205"
 declare namespace led {
 
     /**
diff --git a/libs/radio/radio.ts b/libs/radio/radio.ts
index a0f5e607..43ddb6d1 100644
--- a/libs/radio/radio.ts
+++ b/libs/radio/radio.ts
@@ -1,7 +1,7 @@
 /**
  * Communicate data using radio packets
  */
-//% color=#E3008C weight=96 icon="\uf012"
+//% color=#F62459 weight=96 icon="\uf012"
 namespace radio {
     export class Packet {
         /**
diff --git a/pxtarget.json b/pxtarget.json
index e0f8f034..79452bb0 100644
--- a/pxtarget.json
+++ b/pxtarget.json
@@ -101,7 +101,7 @@
         "textBlocks": true,
         "listsBlocks": true,
         "functionBlocks": true,
-        "onStartColor": "#0078D7",
+        "onStartColor": "#1E90FF",
         "onStartNamespace": "basic",
         "onStartWeight": 54
     },
@@ -377,6 +377,16 @@
                 "snap": false
             }
         },
+        "blockColors": {
+            "logic": "#00A4A6",
+            "loops": "#00AA00",
+            "math": "#9400D3",
+            "variables": "#DC143C",
+            "text": "#B8860B",
+            "advanced": "#00272B",
+            "functions": "#3455DB",
+            "arrays": "#E65722"
+        },
         "highContrast": true,
         "greenScreen": false,
         "selectLanguage": true,