It's important to understand the psychological effects colours might have on an average person. The sight of a large patch of furry brown from the corner of your eye could be enough to trigger emotions and adaptive responses appropriate to an encounter with a large grizzly bear. A lake of water that is a dirty blue may trigger an emotion of disgust, and you could avoid a drink of the same colour thinking it is potentially harmful.

Did you know there are connections that are forged by culture-specific associations of colours to people, objects, places or events that are emotionally-charged? The red and yellow cape of a bullfighter could trigger special emotions in the Spanish culture. The blacks and oranges of Halloween or reds and greens of Christmas could trigger culture-specific emotions. The colours of plants, landscapes or animals that are specific to a region may develop culture-specific emotions. The delicate pinks of the Japanese cherry tree may have special emotional connections for the Japanese, the bright blues of the blue poison dart frog for those in the Sipaliwini Savanna of Southern Suriname or the pale reds of the Arizona desert may have for the indigenous Indians.

Grandidierite is magnesium aluminum borosilicate. It is an extremely rare gem that was first discovered in 1902 in southern Madagascar by Alfred Lacroix, a French mineralogist. However, the gem was named in honour of French explorer Alfred Grandidier (1836–1912) who studied the natural history of Madagascar. The gem comes in the form of a strong bluish green to greenish blue translucent to transparent crystals and the blue component increases owing to the iron content. This possesses the property of trichroism, which is the ability to exhibit three different colours depending on viewing angle.

Jadeite is a pyroxene mineral. It is one of the two types of pure jade. The other is known as nephrite jade. What makes Jadeite special is that it is the rarer of the two jades, and as a result, it is considered to be more precious and expensive. The most valuable form of jadeite is a striking and even emerald green that is known as "imperial jadeite." For jadeite, the intensity of the green colour, combined with a high degree of translucency are the key factors in understanding its value. Gems which are extremely dark in colour or not so translucent are comparatively less valued. Ideally, colour should be totally even to the naked eye, without any spotting or veins.

Turaco
Meet the Turaco. It is a unique bird, which belongs to the Musophagidae family. It is found mostly in the sub-Saharan Africa. Its colouring attracts a lot of attention, but it is more due to the peculiar shading in the plumage that makes it all the more attractive. It is mostly shooed away because of its piercing and shrill calls, and is described as 'go-away-birds'. Its crest and long tail is quite prominent. Isn't the bird beautiful?

Take a look at the Cuckoo wasp. It is also known as the Emerald wasp. It is highly sculptured, with stunning metallic colours created by structural coloration. It has been discovered that the colour is actually produced by light refracting through open spaces between six layers of cuticle in its exoskeletons. It glows a brilliant iridescent blue-green, as if illuminated from within. It is found in the desert regions around the world, as it is associated with Solitary bee and wasp species. Interestingly, scientists have not figured out whether the bright colours of the cuckoo wasp serve any function.