Color Depth Test — 8-bit vs FRC in 3 Modes

Fewer stripes = higher depth; hard-to-tell pairs are normal; shimmering gray = temporal dither
Features

Professional Depth Analysis

A professional color depth test: dark 0-15% gradient, ±1 near-color pairs and an FRC dither mode reveal whether your panel is 6-to-8, native 8-bit, 8-to-10 or native 10-bit.

Dark Gradient Mode

A 0-15% luminance gradient — insufficient depth shows stripes here first.

Near-Color Pairs

Side-by-side patches only 1 RGB step apart test step resolution and dither interference.

FRC Dither Check

Stare at the 50% gray patch — temporal dithering appears as faint shimmer/noise.

Concepts

The Truth About Bit Depth

Native 8-bit

Native Depth

Steps per channel the panel physically supports: 8-bit = 256, 10-bit = 1024.

FRC

Dithered Depth

6→8 and 8→10 via temporal/spatial dithering — most “1.07 billion color” claims are this.

32-bit Myth

The 32-bit Myth

Windows “32-bit color” = 24-bit color + 8-bit alpha. It says nothing about panel depth.

How to

Three Steps to Identify Depth

01

Dark Gradient

Fullscreen the 0-15% gradient: coarse stripes = low depth or FRC; smooth = high depth.

02

Pair Discrimination

Examine each ±1 pair: cleanly separable = crisp steps; shimmering edges = dither at work.

03

Gray Stare

Watch the 50% gray patch for 10 seconds — shimmer or crawling noise means temporal FRC.

Compare

Four Depth Tiers

6-bit + FRC

Entry
  • · Coarse dark banding
  • · Obvious gray shimmer
  • · Budget panels
  • · Not for design

Native 8-bit

Mainstream
  • · Slight dark stripes
  • · Stable gray
  • · Pairs mostly separable
  • · Fine for daily use

8-bit + FRC

Near 10-bit
  • · Looks near 10-bit
  • · Micro-noise up close
  • · Sold as 1.07B colors
  • · Semi-pro acceptable

Native 10-bit

Pro
  • · Smooth everywhere
  • · Crisp clean pairs
  • · Broadcast-grade
  • · Check panelook.com
Tips

Pro Tips

Verify Native Depth

Look up the panel model on panelook.com — more reliable than marketing pages.

Bandwidth Matters

10-bit at high refresh needs DP1.4/HDMI2.1; insufficient bandwidth silently drops to 8-bit.

HDR Needs 10-bit

The HDR10 standard mandates 10-bit signals — keep the whole chain 10-bit for HDR work.

Dither Is Harmless

FRC is a mature technology, invisible at normal distances — choose based on need, not fear.

FAQ

FAQ

Recommended Test Environment

  • Dark room is best for the dark gradient
  • Brightness ~50% daily level
  • Disable HDR to test SDR depth
  • Confirm cable bandwidth
  • Sit 40–60cm, stare calmly
  • Avoid direct ambient light on screen
Related

Related Tools

Device Guides

Depth performance feeds into the Wizard verdict — run all checks in one flow.
Open Test Wizard