During the shoot · Framing & metering

Color Meter

Measure ambient colour temperature (K) and green–magenta tint live with the camera. Aiming at a grey card gives the most accurate reading; you can lock a reading and export it as a result card. Includes K↔Mired conversion, a colour-correction filter table (82A, 85B and so on) and an X-Rite 24-patch reference.

When it helps

colour temperature
measure colour temperature
colour meter
kelvin
K value
white balance
set white balance
grey card
tint
green cast
colour cast
mixed lighting
tungsten
colour correction filter
CTO
CTB
Mired
mired shift
colour chart
color meter
gray card

At a glance

Where to find it	Tools tab → Color Meter
Category	During the shoot · Framing & metering
Platforms	iOS / Android / HarmonyOS (native) (coming soon)

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“Color Meter” is one of the 37 photography tools in Optaxis. Coming to iOS, Android and HarmonyOS (native) at the same time, expected between late December 2026 and early January 2027; once live, search for “光轴” (Optaxis) in your app store to download.