Hello everyone! While I'm not totally new to hardwood floors, this is my first time redoing such an old floor with as big a gaps as this one. The wonderful internet advised me to use a trowelable filler. I thought the wood was a red oak, but the filler I'm using is filling in all of the grain and making it look whiter and strange. Is this normal for a filler? Do I have the wrong wood type and filler color?

Thanks in advance and sorry for the obnoxiously long urls

Pic of filler:

https://scontent-ort2-1.xx.fbcdn.net/v/t1.0-9/fr/cp0/e15/q65/79576769_10157614680335586_8035645942642245632_n.jpg?_nc_cat=109&efg=eyJpIjoiYiJ9&_nc_ohc=agV44RAt334AQnchPcwYOgyyzSGg4Xs9Jsvmq2FL_4e62q7NS1QGW7Omg&_nc_ht=scontent-ort2-1.xx&oh=ddc90f038659e462a769437a28acb664&oe=5E858E64

Wood species:

https://scontent-ort2-1.xx.fbcdn.net/v/t1.0-9/fr/cp0/e15/q65/78966268_10157614680530586_6575213524195213312_n.jpg?_nc_cat=104&efg=eyJpIjoiYiJ9&_nc_ohc=5V2zJZDiaNgAQncMICF_55GaYBa_WCPQEf5lE-d-Dmm84N8-dKewSUAhw&_nc_ht=scontent-ort2-1.xx&oh=97e7f9c292d7ca7799e741831f29e2b7&oe=5E7EC083

https://scontent-ort2-1.xx.fbcdn.net/v/t1.0-9/fr/cp0/e15/q65/79497575_10157614680420586_5469011277969883136_n.jpg?_nc_cat=105&efg=eyJpIjoiYiJ9&_nc_ohc=0KfMZJ8633QAQla8IwrCItsSoKE4976TuwQ0vOgaqm315sUPkpUfnoXWQ&_nc_ht=scontent-ort2-1.xx&oh=26170387071784782c8daa5f2837a8e7&oe=5E7995EB

The filler will need to be sanded off to get it out of the grain. This is normal looking when the filler has dried.
Sometimes an old floor has a bleached look, too, from intense light. As the wood is sanded you will see more pink color, if it is red oak.
The first coat of finish will bring out the color.

Thanks Pete! I did sand it down, but I'm guessing not enough. Does it look like red oak to you?

It looks like it m ay be red oak. From the end of a freshly cut red oak board you can see tiny holes in the spring wood which you can blow through to make bubbles in a glass of water. The medullary rays are not as pronounced as white oak, so it is easy to see the difference in quarter sawn boards. It is hard to tell the difference when the boards have been bleached in bright light. Red oak usually has an orange look and white oak is more yellowish brown.