How to Create a Cartoon Rainbow in Photoshop
Usually when the sun is shining and it is raining at the same time, you can see a rainbow. The rainbow is a huge arch of colours in the sky. The number of rainbow colors is seven. These seven colors are: red, orange, yellow, green, blue, indigo and violet.
Create a new PSD file, size 1750x230 px. Create a new layer called Rainbow and fill it with color white.
Add a Gradient Overlay to the Rainbow layer.
We have to add the seven rainbow colors in equal parts like shown in the preview. The colors are violet(#ea3bec), indigo(#8737ff), blue(#008aff), green(#48ff00), yellow(#fff600), orange(#ff9600) and red(#ff3c00).
Right click on the Rainbow layer and choose Conver to Smart Object.
We will create a new PSD document called "Cartoon Rainbow". Create the Background Sky layer and fill it with color #22d8e8 .
Duplicate the Rainbow layer in this new PSD file.
Go to Edit > Transform > Warp and choose Arch with Bend 50.
Press Control-T to Scale the object to Horizontal scale: 23% and Vertical Scale: 35%.
Add a Stroke layer style to the Rainbow layer.
If you want to make the cartoon rainbow background look more cute you can add these cartoon cloud shapes to your image. Add the cloud shapes in a new layer using the Custom Shape Tool.
Use color white for the clouds and add this layer style: Inner Shadow color #37b8d8 and Outer Glow color #03656e.
You can add other shapes like star shapes for example or hear shapes to make it look like a cartoon.
This tutorial is a remake of an older tutorial that had this rainbow image as final result.
You can download the high quality rainbow background for free here.