Activity: red 28%, orange 18%, yellow 15%, …
Heller (1989)

Agressivity: red 50%, black 10%, yellow 10%, …
Heller (1989)

Airy: white 37%, yellow 18%, pink 17%, ….
Heller (1989)

Arousal, excitement: red 33%, orange 20%, yellow 13%, …
Heller (1989)

Braggery: gold 31%, orange 18%, yellow 10%, …
Heller (1989)

Childhood: pink 34%, green 13%, yellow 9%, …
Heller (1989)

Cosiness: orange 22%, yellow 17%, red 13%, …
Heller (1989)

Delicate: pink 46%, white 20%, yellow 12%…
Heller (1989)

Energy: red 38%, orange 18%, yellow 16%, gold 7%, …
Heller (1989)

Extrovert: yellow 24%, gold 24%, orange 19%, red 14%, …
Heller (1989)

Yellow and green are the colours most associated with sour taste.
Green and – in a lesser degree – brown are the colours most associated with bitter taste.
Pink – and in lesser degree – red/orange are the colours most associated with sweet taste.
Blue and white/grey are the colours most associated with salty taste.
Bernard Lahousse (2015).

The distinction between cold and warm colours is very old, rooted in the language about colours (Berlin & Kay, 1969) and is perceptually important. Psychological research at the University of Padua into the cold / warm qualities of colours shows that the subjective colour temperature experience changes abruptly when the limit of the hue values ​​above 120° in the CIELAB colour system has been exceeded. The same sudden change occurs around 330° (da Pos & Valenti, 2007). A clear correlation has been established between cold / warm and hue values ​​(Jin, Eun & You, 2003). This agreement also appears to work cross-culturally (Sato, Xin & Hansuebsai, 2003). The cold / warm contrast is related to the perceived light in a landscape. The “warm” colours are associated with daylight or sunset, and the “cold” colours associated with a gray or dark day. Warm colours are the shades of red-violet to yellow, cool colours are the shades that run from blue-green through blue-violet.

Above average red scores have been found in men who have committed aggressive sexual offences (Siedow, 1958), while high yellow scores have been found in high performers and goal directed subjects. Thus preference for red seems to be associated with uncontrolled acting out behavior, while preference for yellow goes along with out-going but well-controlled modes of expression.
(Schaie, K. W., 1966)

It has been noted that the colours on the red end of the spectrum (red, yellow) have high arousal value while those at the blue end (blue, green) have low arousal value.
(Schaie, K. W., 1966)

Extrovert people seem to have a preference for red, orange and yellow.
Heller E. (1989)

The psychologist Lüscher (1969) uses the parameter active/passive in his well-known colour test. The active colours are then yellow and red, the passive blue and green. Passivity means rest and the general decline of metabolic processes and glandular function. Activity accelerates the metabolic process and gland function increases. Primitive peoples showed a number of basic behaviours. The active primitive man was a hunter, his activity was focused on conquest and obtaining. A passive behaviour was self-preservation, defence, withdrawal.
(Lüscher & Scott, 1969).

Colour naming, unique hues, and hue cancellation predicted from singularities in reflection properties. Mean research results: Unique yellow: 577nm; Unique red: 715nm; Unique Blue: 474nm; Unique green: 529nm. (Philipona & O’Regan, 2006)

Culturally, small variations in the choice of warm and cold colours have been identified. In the Thai survey (Sato, Xin & Hansuebsai, 2003), the cold shades are slightly cooler than the Japanese ones. The Thai warmest colour is a warm orange (red-orange) and the coldest colour a bluish green. The border colours between warm and cold, eg. the transitional nuances between yellow and green gave rise to unclear results.