Essentially a simple exercise in colour recognition, registering the purity of colour and recognising the range of variation in certain primary and secondary colours.
An exercise, simple in description has proven far more difficult to complete... perhaps a reflection of my relationship with colour..... a poor one!
There is a plethora of green in the world, and enormity of shades, saturation and brightness. Additionally in the natural world the colour is affected by the opacity of pictured items and the effect of light not just hitting the surface but also transmitting through it. As with all the tests - the lesser exposed images provide a more intense variation while over exposure increases the brightness transmitted and the perceived saturation.
Red suffers less with opacity than naturally found green, presenting a more solid colour, and responding accordingly with changes in exposure metering. Again in both natural and artificial forms red occurs in a huge number of variations that can be called red as a hue.
Yellow presents a lesser range of variants than both red and green while still being able to be still defined as distinctly yellow- green in particular affects the hue, and as a bright colour - it dirty's easily.
A colour in short supply... falling into the blue....
Orange can cope with much variation and still be called orange, however in its more distinct form I find the edges of these petal tips meet the requirements of being a secondary colour.
Again a ubiquitous colour with many variants.