Which Color Management setting for SDR footage?

[1.21 gigawatts]

I've got some SDR rec.709 footage im working with, and would like to know which setting  should i chose under "color management" on Premiere Pro New Project window?

100(63% HLG, 58% PQ) ?

203(75% HLG, 58% PQ) ?

300 (81% HLG, 62% PQ)?

Some moremedia info if needed:

Format : AVC H.264

Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits

[1.21 gigawatts]

Thought this one would be an easy answer?

Its just confusing that all the colour management options are for HDR, when lot of cameras are only SDR. I assume it must be fine to just work in default 203?

[Ann Bens]

Just leave it default.

[R Neil Haugen]

That's something you don't need to worry about ... graphics white is where your HDR media turns to speculars, either at 203 or 300 typically, ergo those options. Leave it at 100.

Neil