input: [Colour] Yellow [Muddy/Dark] Muddy yellow may represent the owner is shy or withdrawn. It can also reflect too much thinking, being over-critical, or feeling deprived. Sicknessess associated with dark yellow are usually chest or stomach ailments. [Clear/Bright] 
output: This colour shows mental activity, and optimism; it can also mean new learning opportunities. A golden yellow means that the person takes care of him/herself. Yellow can also reflect wisdom, intellect, enthusiasm, and early spiritual development.