Sepia Toning in photoshop

Just follow these steps.
1. Start with a black-and-white image.

2. Convert the image to color using Image > Mode > RGB Color.
3. Choose Image > Adjustments > Hue/Saturation, or press Ctrl/Command +U to produce the Hue/Saturation dialog box.
4. Click the Colorize button, and then move the Hue slider to the 20 position for a sepia tone, or any other position on the scale for a blue, green, or yellow tone, as you prefer.
5. Move the Saturation slider to enrich or mute the tone. Click on OK to apply the toning effect.

6. Use Photoshop’s Brightness/Contrast controls to give the image a somewhat
washed-out, old-timey look if you like.


You can also get a toned effect using Photoshop’s Duotone feature.
1. While in Grayscale mode, choose Image > Mode > Duotone.
2. When the Duotone Options dialog box pops up, choose Duotone from the
Type drop-down list.
3. Click the colored box next to Ink 2 to select a custom color for the second
shade.
4. Click the spectrum in the center of the Custom Colors dialog box to choose
a particular color range, then click on the exact color swatch you want from
the patches on the left side of the dialog box.
5. Click on OK twice to apply the duotone.