| Value | Meaning |
|---|---|
| Unknown0 | unknown color primaries |
| Bt7091 | BT709 primaries, also ITU-R BT1361 / IEC 61966-2-4 / SMPTE RP177 Annex B |
| Bt470m2 | BT470M primaries, also FCC Title 47 Code of Federal Regulations 73.682 (a)(20) |
| Bt470bg3 | BT470BG primaries, also ITU-R BT601-6 625 / ITU-R BT1358 625 / ITU-R BT1700 625 PAL & SECAM |
| Smpte170m4 | SMPTE170M primaries, also ITU-R BT601-6 525 / ITU-R BT1358 525 / ITU-R BT1700 NTSC |
| Smpte240m5 | SMPTE240M primaries |
| Film6 | Generic film (colour filters using Illuminant C) |
| Bt20207 | ITU-R BT2020 primaries. Since: 1.6 |
| Adobergb8 | Adobe RGB primaries. Since: 1.8 |
| Smptest4289 | SMPTE ST 428 primaries (CIE 1931 XYZ). Since: 1.16 |
| Smpterp43110 | SMPTE RP 431 primaries (ST 431-2 (2011) / DCI P3). Since: 1.16 |
| Smpteeg43211 | SMPTE EG 432 primaries (ST 432-1 (2010) / P3 D65). Since: 1.16 |
| Ebu321312 | EBU 3213 primaries (JEDEC P22 phosphors). Since: 1.16 |
The color primaries define the how to transform linear RGB values to and from the CIE XYZ colorspace.