Merfolk With RED Tails Are:
At their best-optimistic, confident, passionate, ambitious, hard-working
At their worst-impulsive, impatient, aggressive, angry, controlling, a know-it-all, over-confident

Merfolk with ORANGE Tails Are:
At their best-warm, optimistic, friendly, good-natured, generally agreeable, assertive, determined, tolerant, accepting, athletic, fun-loving, good cooks

At their worst-loud, obnoxious, disloyal, find it difficult to commit, restless, impatient, lousy at housekeeping, forceful, domineering, indecisive, inconsistent, unpredictable, unkind practical jokers, egotistical, self-centered, uncaring

Merfolk With YELLOW Tails Are:
At their best-happy, cheerful, fun to be with, creative, imaginative, independent, spontaneous, have a modern outlook, good at networking and getting information out of others, intelligent, well-educated, well-dressed
At their worst-over-analytical, very critical of themselves and others, impulsive, can become bitter and sharp-tongued if crossed, spend money rapidly and unwisely, stubborn, deceitful, arrogant, pretentious, snobbish

Merfolk With GREEN Tails Are:
At their best-practical, down-to-earth, kind, generous, compassionate, good to have around during a crisis, caring, nurturing, intelligent, quick to learn, gracious, well-mannered, have high moral standards, loyal friends, faithful partners, gentle, modest
At their worst-gossipy, complacent, self-righteous, self-effacing, prone to envy and jealousy

Merfolk With BLUE Tails Are:
At their best-reliable, trustworthy, genuine, sincere, responsible, generally fairly even-tempered, loyal, faithful, approachable, friendly
At their worst-rigid, indifferent, can be quite manipulative but in a very subtle way, emotional, overly cautious, a worrywart, prone to self-pity

Merfolk With INDIGO Tails Are:
At their best-honest, compassionate, understanding, organized, conscientious, reliable, have a strong sense of justice, intuitive, perceptive, fair
At their worst-moody, overly dramatic, addictive, workaholic, may not trust easily, may be a show-off, narrow-minded, intolerant, prejudiced, fanatical, obsessive

Merfolk With PURPLE Tails Are:
At their best-sensitive, compassionate, understanding, supportive, gentle, peaceful, dignified, charismatic, alluring, creative, imaginative, intuitive, generous givers, visionary, love to travel, usually see the best in everybody

At their worst-overly sensitive, overly idealistic, impractical, eccentric, secretive, moody, dislikes responsibility and has difficulty dealing with real day-to-day problems, often late for everything, arrogant, conceited, selfish, self-indulgent, dislikes being imposed upon by others’ beliefs and regulations

Merfolk With PINK Tails Are:
At their best-loving, kind, generous, sensitive, friendly, approachable, warm, have a maternal instinct, protective, feminine, romantic, sensual, sensitive, optimistic, positive, see the good in everyone, refined, non-violent, youthful
At their worst-flippant, immature, naive, frail, vulnerable

Merfolk With TURQUOISE Tails Are:
At their best-friendly, approachable, easy to communicate with, compassionate, empathetic, caring, honest, intuitive, spiritual, creative, sensitive, self-sufficient, has good self-esteem, a clear thinker and good decision maker, organized, confident, good at multi-tasking
At their worst-self-centered, boastful, narcissistic, egotistical, conceited, impractical, idealistic, unreliable, deceptive

Merfolk With MAGENTA Tails Are:
At their best-imaginative, creative, artistic, non-conformist, cheerful, optimistic, compassionate, kind, considerate, supportive, spiritual, resourceful, have a good sense of humor
At their worst-impulsive, either over-emotional or under-emotional, eccentric, obsessive, possessive, needy, selfish, compulsive

Merfolk With BROWN Tails Are:
At their best-honest, down-to-earth, wholesome, reliable, quietly confident, friendly, approachable, genuine, sincere, have a keen sense of duty and responsibility, loyal, trustworthy, supportive, dependable, sensitive, sensual, warm, hard-working, industrious, reliable, encouraging, frugal
At their worst-suppresses their emotions at times, overly sensitive

Merfolk With BLACK Tails Are:
At their best-independent, determined, dignified, sophisticated, intriguing
At their worst-may be too serious for their own good, may appear intimidating to even their closest friends, demanding, authoritarian, non-emotional, overly guarded, holds things inside and are not good at sharing themselves with others, rebellious, negative, repressed

Merfolk With WHITE Tails Are:
At their best-neat and immaculate in appearance, positive, optimistic, well-balanced, sensible, discreet, wise, practical and careful with money, have a great deal of self-control, confident, poised, self-assured, self-sufficient
At their worst-fanatical, overly choosy and fastidious, can be very critical of themselves and others, lonely, prudish, close-minded, inflexible

Merfolk With GRAY Tails Are:
At their best-practical, calm, cool, composed, reliable, hard-working, independent
At their worst-indifferent, non-emotional, indecisive, lacking in confidence, pessimistic, unimaginative, uncreative, narrow-minded

Merfolk With SILVER Tails Are:
At their best-intuitive, insightful, imaginative, creative, a good writer, open to trying new things, resourceful, flexible, open-minded, wise, responsible, sophisticated, dignified, classy, gracious, gentle, non-aggressive, has strong values and morals, romantic, loving, quite modern and futuristic in outlook
At their worst-overly introspective, moody as they are effected by the lunar cycle and the ebb and flow of the tides, conceited, snobbish, self-deluded

Merfolk With GOLD Tails Are:
At their best-charismatic, loving, compassionate, warm, positive, kind, tend to be very successful, optimistic, sophisticated, wise, practical, honest, have good leadership qualities, reliable, genuine, trustworthy, cheerful, outgoing, friendly, tend to be a good listener and attract many friends, passionate, enthusiastic, ambitious
At their worst-stressed, anxious, overwhelmed, may have unrealistic expectations, may find it difficult to trust others, overconfident, conceited

Source-Empower Yourself With Color Psychology

I think the purple describes me pretty much perfectly, both the good and the bad, but my bestie thinks it's one of those personality tests that's vague enough to work for just about everyone