1. USING BLUE WITH RED
When using BLUE the one color that is only used once in all of the color theory schemes is RED. BLUE/RED feels a bit like best friends who speak the same language equally.
But sometimes using BLUE/RED can feel a bit unbalanced without a 3rd color. BLUE, RED and YELLOW are all needed for the TRIADIC color scheme. But because YELLOW tends to draw attention, many designers use white as the 3rd leg instead.
Without introducing a 3rd color, consider utilizing a RED-ORANGE to push the color scheme into the SIDE-COMPLEMENTARY color scheme for visual balance.
2. CONSIDER THE AURA
BLUE will cast an ORANGE-aura into the surrounding area (see my blog post How to Successfully Place Colors Side-by-Side, to understand the Law of Simultaneous Contrast.)
The graphic below shows how the RED-aura will affect any surrounding colors.
3. ORANGE IS THE EASY ANSWER
Looking at the COMPLEMENTARY, SIDE-COMPLEMENTARY and SPLIT-COMPLEMENTARY color schemes of BLUE, you will notice the only difference in these 3 color schemes is the shade of ORANGE. The COMPLEMENTARY color to BLUE is ORANGE, the SIDE-COMPLEMENTARY is RED-ORANGE and the SPLIT-COMPLEMENTARY is RED-ORANGE/ ORANGE-YELLOW.
ORANGE is the easy choice to making BLUE look great. Because of this, you will find BLUE/ORANGE a popular color scheme with both photographers and painters alike.
4. IS BLUE BORING?
BLUE is so safe and easy with its easy color schemes. But too much of a good thing can become boring and predictable. Be careful using too much BLUE so that it doesn’t become problematic or create melancholy. (38)