diff --git a/Userland/Libraries/LibPDF/ColorSpace.cpp b/Userland/Libraries/LibPDF/ColorSpace.cpp
index 943f9b96fb..47ffbf181c 100644
--- a/Userland/Libraries/LibPDF/ColorSpace.cpp
+++ b/Userland/Libraries/LibPDF/ColorSpace.cpp
@@ -73,6 +73,11 @@ Color DeviceGrayColorSpace::color(Vector<Value> const& arguments) const
     return Color(gray, gray, gray);
 }
 
+Vector<float> DeviceGrayColorSpace::default_decode() const
+{
+    return { 0.0f, 1.0f };
+}
+
 NonnullRefPtr<DeviceRGBColorSpace> DeviceRGBColorSpace::the()
 {
     static auto instance = adopt_ref(*new DeviceRGBColorSpace());
@@ -88,6 +93,11 @@ Color DeviceRGBColorSpace::color(Vector<Value> const& arguments) const
     return Color(r, g, b);
 }
 
+Vector<float> DeviceRGBColorSpace::default_decode() const
+{
+    return { 0.0f, 1.0f, 0.0f, 1.0f, 0.0f, 1.0f };
+}
+
 NonnullRefPtr<DeviceCMYKColorSpace> DeviceCMYKColorSpace::the()
 {
     static auto instance = adopt_ref(*new DeviceCMYKColorSpace());
@@ -104,6 +114,11 @@ Color DeviceCMYKColorSpace::color(Vector<Value> const& arguments) const
     return Color::from_cmyk(c, m, y, k);
 }
 
+Vector<float> DeviceCMYKColorSpace::default_decode() const
+{
+    return { 0.0f, 1.0f, 0.0f, 1.0f, 0.0f, 1.0f, 0.0f, 1.0f };
+}
+
 PDFErrorOr<NonnullRefPtr<CalRGBColorSpace>> CalRGBColorSpace::create(Document* document, Vector<Value>&& parameters)
 {
     if (parameters.size() != 1)
@@ -274,6 +289,11 @@ Color CalRGBColorSpace::color(Vector<Value> const& arguments) const
     return Color(red, green, blue);
 }
 
+Vector<float> CalRGBColorSpace::default_decode() const
+{
+    return { 0.0f, 1.0f, 0.0f, 1.0f, 0.0f, 1.0f };
+}
+
 PDFErrorOr<NonnullRefPtr<ColorSpace>> ICCBasedColorSpace::create(Document* document, Vector<Value>&& parameters)
 {
     if (parameters.is_empty())
@@ -313,4 +333,9 @@ Color ICCBasedColorSpace::color(Vector<Value> const&) const
     VERIFY_NOT_REACHED();
 }
 
+Vector<float> ICCBasedColorSpace::default_decode() const
+{
+    VERIFY_NOT_REACHED();
+}
+
 }
diff --git a/Userland/Libraries/LibPDF/ColorSpace.h b/Userland/Libraries/LibPDF/ColorSpace.h
index ab1e8c4da5..08bc660e7d 100644
--- a/Userland/Libraries/LibPDF/ColorSpace.h
+++ b/Userland/Libraries/LibPDF/ColorSpace.h
@@ -6,6 +6,7 @@
 
 #pragma once
 
+#include "AK/Forward.h"
 #include <AK/FlyString.h>
 #include <LibGfx/Color.h>
 #include <LibPDF/Value.h>
@@ -54,6 +55,8 @@ public:
     virtual ~ColorSpace() = default;
 
     virtual Color color(Vector<Value> const& arguments) const = 0;
+    virtual int number_of_components() const = 0;
+    virtual Vector<float> default_decode() const = 0;
     virtual ColorSpaceFamily const& family() const = 0;
 };
 
@@ -64,6 +67,8 @@ public:
     ~DeviceGrayColorSpace() override = default;
 
     Color color(Vector<Value> const& arguments) const override;
+    int number_of_components() const override { return 1; }
+    Vector<float> default_decode() const override;
     ColorSpaceFamily const& family() const override { return ColorSpaceFamily::DeviceGray; }
 
 private:
@@ -77,6 +82,8 @@ public:
     ~DeviceRGBColorSpace() override = default;
 
     Color color(Vector<Value> const& arguments) const override;
+    int number_of_components() const override { return 3; }
+    Vector<float> default_decode() const override;
     ColorSpaceFamily const& family() const override { return ColorSpaceFamily::DeviceRGB; }
 
 private:
@@ -90,6 +97,8 @@ public:
     ~DeviceCMYKColorSpace() override = default;
 
     Color color(Vector<Value> const& arguments) const override;
+    int number_of_components() const override { return 4; }
+    Vector<float> default_decode() const override;
     ColorSpaceFamily const& family() const override { return ColorSpaceFamily::DeviceCMYK; }
 
 private:
@@ -103,6 +112,8 @@ public:
     ~CalRGBColorSpace() override = default;
 
     Color color(Vector<Value> const& arguments) const override;
+    int number_of_components() const override { return 3; }
+    Vector<float> default_decode() const override;
     ColorSpaceFamily const& family() const override { return ColorSpaceFamily::CalRGB; }
 
 private:
@@ -121,6 +132,8 @@ public:
     ~ICCBasedColorSpace() override = default;
 
     Color color(Vector<Value> const& arguments) const override;
+    int number_of_components() const override { VERIFY_NOT_REACHED(); }
+    Vector<float> default_decode() const override;
     ColorSpaceFamily const& family() const override { return ColorSpaceFamily::ICCBased; }
 
 private: