
- Blue - Wikipedia- Darker shades of blue include ultramarine, cobalt blue, navy blue, and Prussian blue; while lighter tints include sky blue, azure, and Egyptian blue (for a more complete list see the List of colours). 
- What to know about methylene blue - Harvard Health- Apr 24, 2025 · Once used to treat malaria, methylene blue is gaining attention for a range of health-related uses. Learn where it started, how it works, and what the evidence says about its … 
- BLUE Definition & Meaning - Merriam-Webster- The meaning of BLUE is of the color whose hue is that of the clear sky : of the color blue. How to use blue in a sentence. 
- Blue | Description, Etymology, & Facts | Britannica- Sep 3, 2025 · Blue is a basic colour term added to languages after black, white, red, yellow, and green. The term blue derives from Proto-Germanic blæwaz and Old French blo or bleu. 
- BLUE | English meaning - Cambridge Dictionary- BLUE definition: 1. of the colour of the sky without clouds on a bright day, or a darker or lighter type of this…. Learn more. 
- The Meaning and Psychology of Blue in Life & Design- Apr 23, 2025 · Blue, a color that commands a unique position in the color spectrum, has permeated various aspects of our lives, imbuing them with profound meanings and emotions. … 
- The Color Blue: Meaning, Color Psychology, Effects- Feb 20, 2024 · The color blue is associated with feelings of calm and relaxation. Learn about blue's other meanings and its role in color psychology, as well as our feelings and behaviors. 
- BLUE Definition & Meaning | Dictionary.com- Blue definition: the pure color of a clear sky; the primary color between green and violet in the visible spectrum, an effect of light with a wavelength between 450 and 500 nanometers.. 
- All About the Color Blue | Meaning, Color Codes and Facts- Jul 11, 2023 · In this blog post, we dive into the beautiful depths of the color blue, exploring its history, symbolism, similar shades, and complex color codes. Blue, as timeless as the sky and … 
- Shades of blue - Wikipedia- Varieties of the color blue may differ in hue, chroma (also called saturation, intensity, or colorfulness), or lightness (or value, tone, or brightness), or in two or three of these qualities.