Case 1
- Bit depth
- 8bit
256
Open with these valuesColor Depth Calculator
16,777,216colors
Result: 16,777,216 colorsEvery extra bit doubles the palette: colors = 2^bits. 24-bit true color is 2^24 = 16,777,216 shades, one byte each for red, green and blue. 32-bit shows the same 16.7 million colors plus an 8-bit alpha channel, which carries transparency, not color.
Worked examples
Case 2
- Bit depth
- 24bit
16,777,216
Open with these valuesCase 3
- Bit depth
- 30bit
1,073,741,824
Open with these valuesHow it's calculated
colors = 2^(bits per pixel)
- StepEnter the bit depth — the bits stored per pixel.
- StepDouble the count once for every bit: 2 raised to that power.
- ResultRead the number of distinct colors the format can hold.
What this number means
Enter bits per pixel, not bits per channel
Photo tools usually quote the per-channel figure: 8 bit there means 24 bit per pixel across red, green and blue. 10-bit HDR likewise belongs in this field as 30.
Every single bit doubles the palette
The bit count sits in the exponent, so the growth is exponential rather than proportional. Going from 8 to 16 bits does not double 256 colors, it squares them to 65,536.
32-bit carries transparency, not extra color
The additional 8 bits form an alpha channel. Both 24-bit and 32-bit therefore show the same 16,777,216 shades.
The scale runs from 1 bit up to 48
A single bit distinguishes two states, which is the monochrome end of the table. At the other end sit scanners and raw formats with 48 bits and 281,474,976,710,656 shades.
Commonly misread
10-bit HDR produces brighter, more saturated colors.
It produces 1,073,741,824 shades instead of 16.7 million. The gain is visible as smoother gradients, not as stronger hues.
16-bit color shows twice as many colors as 8-bit.
It shows 65,536 against 256 — the square, not the double. Doubling the bits squares the palette.
Reference table
| Bit depth | Name | Colors |
|---|---|---|
| 1 | Monochrome | 2 |
| 8 | Indexed palette | 256 |
| 16 | High color | 65536 |
| 24 | True color | 16777216 |
| 30 | Deep color, HDR | 1073741824 |
| 48 | Scanner and raw formats | 281474976710656 |
Questions
How many colors does 24-bit color have?
16,777,216. That is 2^24, or 256 levels each of red, green and blue, and it is what “true color” means.
Is 32-bit color better than 24-bit?
Not in color. The extra 8 bits are an alpha channel for transparency, so both show the same 16.7 million shades.
What does 10-bit HDR mean?
10 bits per channel, so 30 bits per pixel and 1,073,741,824 colors. The gain shows up as smoother gradients rather than brighter hues.
Why does bit depth grow so fast?
Because it is an exponent, not a multiplier. Doubling the bits from 8 to 16 does not double the palette, it squares it.
Sources and last check
Information, not professional advice.