@startuml
'https://plantuml.com/class-diagram

namespace NaturallyColorModels {
    class CyanMagentaYellowKey
    class HueSaturationValue
    class RedGreenBlue
}

namespace ColorModels {
    abstract AbstractColorModel
    class CyanMagentaYellowKey
    class HueSaturationValue
    class RedGreenBlue
    CyanMagentaYellowKey --|> AbstractColorModel
    HueSaturationValue --|> AbstractColorModel
    RedGreenBlue --|> AbstractColorModel
}
NaturallyColorModels.CyanMagentaYellowKey o-- ColorModels.CyanMagentaYellowKey
NaturallyColorModels.HueSaturationValue o-- ColorModels.HueSaturationValue
NaturallyColorModels.RedGreenBlue o-- ColorModels.RedGreenBlue


namespace Transformer {
    interface ColorModelTransformInterface {
        + toRedGreenBlue(): RedGreenBlue;
        + toCyanMagentaYellowKey(): CyanMagentaYellowKey;
        + toHueSaturationValue(): HueSaturationValue;
    }
    class CyanMagentaYellowKeyTransformer
    class HueSaturationValueTransformer
    class RedGreenBlueTransformer
    ColorModelTransformInterface <|-- CyanMagentaYellowKeyTransformer
    ColorModelTransformInterface <|-- HueSaturationValueTransformer
    ColorModelTransformInterface <|-- RedGreenBlueTransformer
    namespace Utilities {
        abstract AbstractHueSaturationValueToUtility
        class CyanMagentaYellowKeyToHueSaturationValue
        class HueSaturationValueToCyanMagentaYellowKey
        class HueSaturationValueToRedGreenBlue
        class RedGreenBlueToHueSaturationValue
        Transformer.Utilities.CyanMagentaYellowKeyToHueSaturationValue --|> Transformer.Utilities.AbstractHueSaturationValueToUtility
        Transformer.Utilities.HueSaturationValueToCyanMagentaYellowKey --|> Transformer.Utilities.AbstractHueSaturationValueToUtility
        Transformer.Utilities.HueSaturationValueToRedGreenBlue --|> Transformer.Utilities.AbstractHueSaturationValueToUtility
        Transformer.Utilities.RedGreenBlueToHueSaturationValue --|> Transformer.Utilities.AbstractHueSaturationValueToUtility
    }
    CyanMagentaYellowKeyTransformer o-- Transformer.Utilities.CyanMagentaYellowKeyToHueSaturationValue
    CyanMagentaYellowKeyTransformer o-- Transformer.Utilities.HueSaturationValueToRedGreenBlue

    HueSaturationValueTransformer o-- Transformer.Utilities.HueSaturationValueToRedGreenBlue
    HueSaturationValueTransformer o-- Transformer.Utilities.HueSaturationValueToCyanMagentaYellowKey

    RedGreenBlueTransformer o-- Transformer.Utilities.RedGreenBlueToHueSaturationValue
    RedGreenBlueTransformer o-- Transformer.Utilities.HueSaturationValueToCyanMagentaYellowKey
}
ColorModels.AbstractColorModel --o Transformer.ColorModelTransformInterface

@enduml