Your name is FLOREN SUTHAS and you are a RAINBOW DRINKER. You’ve spent the last several hundred sweeps as an UNDEAD, most of that time being underground in the BROODING TUNNELS.

You left on your own in pursuit of KNOWLEDGE and FREEDOM and to escape the dark tunnels which you felt were SUFFOCATING. You normally keep to yourself and collect BOOKS. You have a variety of INTERESTS besides READING, which includes practicing the way of the SWORD, MARTIAL ARTS, and the study of RELIGION. 

Being the way you are you are practically a walking LIBRARY, as you frequently TRAVEL away from the abandoned hive you now live in. While you prefer NON-FICTION you do not mind reading intriguing FICTION, though you are often harshly critical of it.

Your ideas on the hemospectrum are fairly NEUTRAL. You care little for it, and kill trolls only to drink their BLOOD. However, MUTANTS you cannot stand, as it means your fellow JADEBLOODS are not doing their duty and culling those who do not belong on the surface.


i did the hemospectrum lifespan math. turns out, the hemospectrum is ridiculous.

as you can see from my maths sheet (with some explanations hastily added here and there,) the references I used were from canonical sources (hussie and the comic itself) stating that:

  1. the burgundy bloods live about 30-50 human years
  2. lifespans begin to go over a century with the greens
  3. ceruleans can outlive “dozens” of midbloods
  4. the fushia bloods can live a Long Fucking Time, which i quantified for math purposes

my “evidence only” chart uses only those first three canonical facts, with some guesstimates for fuchsia.

i plotted those on a chart, realized it was ridiculously exponential, then plotted the ln of the values on a chart, which you see. i then tried out some fits on the max values, and found a second degree polynomial was almost perfect.

this made a formula for maximum really simple - just use the fit formula and raise e to it.

i needed to come up with something a little arbitrary for min though, since i only had two points. so i decided that i wanted the difference in the ln of maximum and minimum age to increase either linearly or polynomially - meaning that the difference between actual maximum and minimum age would increase at a very fast exponential rate. this makes sense, because there are lots of things that can kill trolls early in their lives, but being higher on the hemospectrum does give them quite a bit of toughness. so their minimum age should increase significantly, but not nearly as fast as the maximum age.

i ended up using a cubic increase - i got that magic d#3 number by simply dividing the difference in the fuchsia and burgundy age gaps by the cube of 12, then multiplying that magic number by the cube of the index (with maximum of 12) in the actual difference formula. add that to the base difference and subtract it from the ln of the maximum age and raise e to the whole thing, and bam, minimum age. math!

as you can see, the math gave me the desired realistic result.

it turns out that in order to display the hemospectrum differences, you need four separate overlapping column charts. if you try to plot all 12, you can see violet and fuchsia and nothing else. (the obvious solution would be to display it as an ln, but then you couldn’t appreciate the magnitude of the increase! it just ends up looking nice and smooth:)

the middle chart is how many lives of lowbloods each highblood can expect to live. i.e. a fuchsia blood can expect to live the lives of 307 thousand burgundy bloods, and 11 violet bloods. if you follow the diagonals, you can see the exponential increase by the fact that the diagonals are increasing! (e.g. olive lives about 2 lime lives, while violet lives about 8 purple lives.)

So human years conversion…

  • Redbloods: 50-65 years
  • Brownbloods: 98 years
  • Yellowbloods: 146 years
  • Limebloods: 219 years
  • Greenbloods: 329 years
  • Jadebloods: 494 years
  • Tealbloods: 741 years
  • Ceruleanbloods: 1112 years
  • Bluebloods: 1662 years
  • Indigobloods: 2499 years
  • Violetbloods: 3749 years
  • Tyrianbloods: 5623 years
  • Mutantbloods: unknown

Let the sadstuck commence

Every single blood color, text color, and icon color that is canon within Homestuck. The text color sometimes differed from the blood color, as did the symbol (icon, when you go to the wikia.) I also took into account the canon fantroll blood colors, the lusi blood colors (back in Act 5, when Eridan and Vriska killed lusi for Feferi). Lastly, I used the blood colors from the two unknown grubs that were in Openbound Part 2. 

Feel free to use!


Alright kids, see this lil thing right here? OF COURSE YOU HAVE you’ve probably seen the thing like a billion times by now gosh its fucking everywhere

I wanna direct you to a leeeeeetle tool I haven’t seen anyone talk about on the side, though.

Do you see it yet?

do yOU SEE IT YET? ??



This right here is the hue level, and let me tell you it is the most useful tool in hemospectrum-blood-caste-classification HISTORY. This lil thing is set to 0 right now because its on red, but there is a number for EVERY FUCKING COLOR LEVEL you can imagine. It doesn’t take in to account the saturation or luminosity of it, nope, just the color itself, which is exactly what we need in classifying caste levels of the hemospectrum. It goes from 0 to 359, the higher the number, the higher the blood color.

In the above picture, I have mapped out the cannon troll’s hue level, as well as the halfway mark between the neighboring caste levels. (I also put my own notes/headcannons on there but shhhhh) Grab your calculators because this is the part where you do actual math and crap. See this is what I’m doing with my education I’m spending my Friday nights alone in a dark room figuring out gay alien social and biological weirdness where did my life go wrong


So, assuming that the cannon trolls are smack-dab in the middle of their caste, here’s a quickref for the hue levels for each caste. (Some of the numbers are tweaked a bit, I.E the jadebloods and limebloods, because they’re particularly rare in troll society.) You can probably change around the borderline by three points and no one will notice, though.

OK NOW WE’RE GONNA TALK ABOUT SATURATION/LUMINOSITY. Yes I’m aware it’s already on my giant picture full of notes up there but fuck you I wanna talk about this for a bit

This is where those other two tools available in the color window come in to play. Don’t remember them? HERE LET ME GET IT FOR YOU

These are the saturation and luminosity tools. (S is for the saturation, B is for the luminosity.) Saturation is basically how color-ey your color is, while luminosity decides if its black or vivid as fuck. A shade with 0 saturation and 100 luminosity would be white, and as long as you keep the saturation at 0 you can move the luminosity up and down and get varying shades of grey and black. (You can also get black with the saturation all the way up.) However, a shade with 100 saturation and 100 luminosity would be the most concentrated shade of WHATEVER you can get. In the above chart, I’ve mapped out the ‘safe zone’ of which you may have your blood color be without it being considered a mutant. (Keep in mind these are only my personal rules and you can do whatever the hell you want. Hell even these calculations are stretching it a TON like wow.)

OK THATS ALL I HAVE TO SAY. Now go off and have fun doing fantroll stuff or whatever it is you kids do with weirdass alien color biology calculations. *~*.’*~ \(◕u◕\✿)

Okay, Sudden Realization

Okay, so I have this headcanon that The Vantas family should actually be higher on the hemospectrum then the Piexes family. That being the case, I was snooping through some of the Ancestor stuff to write a story for my Disciple book, and I stumbled across this.

This guy is called His Honorable Tyranny. In his description, It says he has three sets of horns, the front ones resembling CRAB CLAWS.

The second set resembles SICKLES

And then the third is just another set of horns.

This whole guy’s theme is CANDY RED COLORED.



So, using that information, with His Honorable Tyranny residing over trials as a judge, and with Redglare having been a secret Sufferer Worshipper, why would he resemble Sufferer and the Vantas’ more than HIC? Because Sufferer should have been the highest blood. He resembled him most closely.

I also believe this is why a lot of what HIC owns is red. Maybe it was never really hers to begin with. Maybe somewhere down the line, the fact that candy red blood was higher on the hemospectrum got buried and she used it to her advantage?

I’m just saying, His Honorable Tyranny kinda supports my headcanon.

Okay! So you know that thing I mentioned? Last night? I actually did it

This seems like it should have taken longer than it did but whatever

This is a chart that includes the combinations of all the SGRUB troll symbols and blood colours. I used this colour blender and designed all the symbols myself - believe it or not, I drew all the symbols themselves quite some time ago, before I had even heard of Erisol or Fefeta, but of course those seem like some pretty obvious combinations.

Cancer is on there twice - all the symbols are the same, but the colours are different because I included both mutant candy red as well as the extinct lime caste, which is useful only for the colours.

So basically, use these for whatever! The symbols + colours can be used for shipping, the symbols can be used for bloodswaps, the colours can be just used for generic fantroll purposes. In fact, some of these signs are different enough just to be used on their own, without any relation to the original trolls.

A lot of these blood colours would probably be considered off-spectrum and therefore mutations, but on the other hand a lot of them will be perfectly fine! I reccomend using this colour converter to find the hues of any blood colours on this chart, and then using the guide at the bottom half of this page to determine what caste each colour would fall into!

Would be cool if anyone could link me if they use anything of this chart so I can determine how entirely useless this endeavour was overall.

So me and oneirogenic worked on a Hemospectrum chart for our own reference and I figured I’d make it presentable and share it. So okay, here’s the details: 

This is, from my perspective, the best way to have slight variation in troll blood colors, with still keeping to canon. Hussie says there are 12 blood colors, including Lime. Then you have Karkat as a 13th, mutant blood color. There are technically 12 colors + potential mutant variations listed here. There are just different shades.

MOST of the Troll’s marked colors were taken from comic panels. However, some were shifted slightly warmer or cooler so the spectrum would actually function more like, well, a spectrum. Not to mention the fact that the blood colors of the trolls do change between different panels (which is expected). So think of them as close-as-possible estimates.

Sollux’s blood color, for example, is technically cooler than is shown here, and Nepeta’s is technically very slightly warmer, however, in order to fit in Lime Bloods, I had to shift theirs very slightly in different directions.

Since the canon blood colors we have to work off of fell into a specific range, that’s where we marked off the spectrum for color picking. All of the trolls easily fell into the lightest lights, the mid range, or the darkest darks. Because the hue of each Troll’s blood color fell neatly in this selected range, but many had different shades, I decided to set this up with the three steps for three possible shades of each hue.

So that’s why I have three shades of each color. I like to think that trolls would only have the 12 basic colors, but depending on the troll itself, your colors vary slightly between light or dark.

The mutant blood colors are taken from each color in the spectrum, and shifted to the highest saturation, like Karkat’s. No clue if these colors could exist in canon, but I stuck them in anyway to balance the chart. You probably don’t wanna give your Fantroll mutant blood, though.

Dots obviously mark where each Troll fits into this chart. And that’s about it! Other than that, I had a lot of fun making this because I love colors. And now I’m gonna use this to make all of the fantrolls. All of them.