I always come across a lot of questions wondering how people can figure out their appearance and their spouses appearances so I thought I'd share some different techniques on how to see this!
You need to have your sidereal information as this is going by Vedic technique. First technique:
For YOUR appearance: check planets in your 7th house in your D9 chart. If no planets occupy your 7th house in D9, look at the lord of 7th house and what sign it is placed in, in the D9 chart.
For SPOUSES appearance: check planets in 7th house in D1 chart. Again, if no planets are sitting in the 7th of your D1 chart check the lord and where it is placed in your D1 chart to see spouses appearance.
For example: Ketu, Rahu or Saturn in the 7th can give a darker complexion. If you have Ketu conjunct Saturn in the 7th house, the complexion will be very burnt dark and muddy.
Second technique:
For YOUR appearance, check your Ascendant sign, ASC lord and any planets in your 1st house in your D1 chart. Then check your planet with the highest degree, also known as Atmakaraka in Jamini (do not consider Rahu or Ketu when figuring out which planet holds highest degree). After seeing what planet in your D1 chart holds the highest degrees, check what sign that planet is placed in and if that planet is conjoined any other planets. Don't look at planets aspecting your Atmakaraka, only planets conjoined.
For SPOUSES appearance: Check the Descendant sign, lord and any planets sitting in the Descendant in your D1 chart. Then check the planet that holds the lowest degrees in your chart, this is called Darakaraka (besides Rahu and Ketu). Then check what planets (if any) are conjoined your Darakaraka, don't consider the planets aspecting it, only if any planets are conjoined.
You use this technique in your birth chart and the Navamsa only.
Planets that describe the look:
Sun - square body, ruddy complexion
Moon - round body, fair complexion
Mars - shorter, thin body, gives a redish complexion
Mercury - well-proportioned, golden complexion (it is said Mercury has the best body amongst all the planets)
Jupiter - tall, large limbed, fair complexion
Venus - beautiful eyes, beautiful body (curvy), medium brown complexion
Saturn - tall, thin, big teeth, dark complexion
Rahu - dark complexion
Ketu - dark complexion
Signs describing look:
Aries - can give red hair, tall in height
Taurus - tall in height
Gemini - stoutness, average height
Cancer - stoutness, fair complexion
Leo - tall height
Virgo - youthful appearance, stoutness, average height
Libra - average height
Scorpio - shorter than average
Sagittarius - average height
Capricorn - tall height
Aquarius - Average height, darker complexion
Pisces - Average height
You have to take in account all of these things combined to figure out the appearance.
Hope this was helpful!