RGB yog additive thiab ua los ntawm lub teeb, CMYK yog subtractive thiab ua los ntawm roj inks. Kev hloov ntawm lawv yog kauj ruam txhua tus screen tsim ua ntej nws tuaj yeem luam tawm.
Yuav ua li cas RGB rau CMYK hloov ua haujlwm
- Nyeem R, G thiab B ua sRGB tus nqi ntawm 0 txog 255.
- Nrhiav lub xim hauv Coated FOGRA39 tus qauv, tus ICC tus qauv txheem rau daim ntawv npog hauv Europe.
- Siv txoj kev colorimetric sib piv nrog kev kho qhov dub tshaj plaws, kom daim ntawv dawb tseem dawb thiab qhov dub hloov mus rau tshuaj xim luam tsaus tshaj plaws uas lub tshuab luam tuaj yeem luam tau.
- Hloov tag nrho plaub tus nqi mus rau percentages nruab nrab 0 thiab 100.
Qhia ua piv txwv
Qhov no siv tus qauv Coated FOGRA39 txheem. Cov chaw luam ntawv siv lawv tus kheej ICC cov qauv thiab kev txwv tshuaj xim, yog li lwm tus qauv CMYK (piv txwv li los ntawm chaw luam ntawv koj) muab lwm tus lej. Suav qhov tshwm sim ua ib qho kev siv tau zoo, tsis yog kev faib npaj rau lub tshuab luam tam sim.
RGB thiab CMYK piav
Dab tsi yog RGB?
RGB piav txog xim ua peb lub channel ntawm teeb — liab, ntsuab thiab xiav — txhua tus los ntawm 0 txog 255. Nws cia raws li cov zaub ua haujlwm tiag: tag nrho peb ntawm 255 yog dawb, tag nrho ntawm 0 yog dub. RGB yog qhov kev xaiv thaum twg koj xav xam nrog xim, thiab rgba() ntxiv kev pom qhov muag (transparency) ntxiv.
- Syntax:
- rgb(R, G, B)
- Range:
- 0–255 per channel
- Zoo tshaj rau:
- code, canvas, transparency with rgba()
Dab tsi yog CMYK?
CMYK yog qauv plaub-ink siv hauv kev luam: cyan, magenta, yellow thiab key (black), txhua tus ua feem pua los ntawm 0 txog 100. Ink thim teeb es tsis txhob tso tawm nws, yog li CMYK npog tsawg xim dua zaub — yog vim li cas cov xim ci ncoo ntawm zaub qee zaum zoo li tsis ci thaum luam tawm.
- Syntax:
- cmyk(C%, M%, Y%, K%)
- Range:
- 0–100% per ink
- Zoo tshaj rau:
- print, packaging, press-ready artwork
RGB rau CMYK daim ntawv reference
Cov xim CSS feem ntau, hloov los ntawm RGB rau CMYK.
| Xim | RGB | CMYK |
|---|---|---|
| black | rgb(0, 0, 0) | cmyk(89%, 78%, 62%, 97%) |
| white | rgb(255, 255, 255) | cmyk(0%, 0%, 0%, 0%) |
| red | rgb(255, 0, 0) | cmyk(0%, 95%, 92%, 0%) |
| lime | rgb(0, 255, 0) | cmyk(64%, 0%, 100%, 0%) |
| blue | rgb(0, 0, 255) | cmyk(93%, 75%, 0%, 0%) |
| yellow | rgb(255, 255, 0) | cmyk(9%, 0%, 96%, 0%) |
| orange | rgb(255, 165, 0) | cmyk(0%, 43%, 94%, 0%) |
| teal | rgb(0, 128, 128) | cmyk(83%, 27%, 48%, 12%) |
| purple | rgb(128, 0, 128) | cmyk(63%, 100%, 4%, 1%) |
| gray | rgb(128, 128, 128) | cmyk(48%, 39%, 39%, 21%) |