Blue
#0000FF
Color Values
What Colors Make Blue?
No mixing formulas available for this color.
Color Meaning
Blue is the color of trust, calm, and stability. It represents intelligence, responsibility, and tranquility.
Learn more on WikipediaFrequently Asked Questions About Blue
What two colors make blue?
Blue is a primary color in the RYB color model and cannot be created by mixing other colors. You must use pure blue paint. In light (RGB), blue is a primary color.
How do you make dark blue?
Dark blue (navy or midnight blue) is made by mixing blue with a small amount of black. Add black gradually for the desired depth.
How do you make light blue?
Light blue (sky blue or baby blue) is made by mixing blue with white. Add white gradually for the desired lightness.
What colors make blue-green?
Blue-green (teal or turquoise) is made by mixing blue with green in equal parts. Adjust the ratio for different shades.
The History of Blue
Blue is perhaps the most fascinating color in history because it was, paradoxically, one of the last named in many ancient languages despite being abundantly visible in sky and sea. Ancient Greek had no word for blue — Homer described the sea as 'wine-dark,' not blue. Ancient Latin similarly lacked a true blue word. The reason: blue dyes and pigments were extraordinarily difficult to make. True blue was first achieved synthetically by the ancient Egyptians around 2500 BCE (Egyptian blue, copper calcium silicate) — the world's first synthetic pigment. In medieval Europe, ultramarine blue (derived from lapis lazuli imported from Afghanistan) was more expensive than gold by weight, reserved for painting the Virgin Mary's robes. The discovery of Prussian blue in 1704 and synthetic ultramarine in 1826 finally made blue accessible to all painters. Jeans denim — indigo blue cotton — became the world's most worn fabric.
Cultural Significance
Blue's cultural significance is extraordinary in its breadth and depth. In Western culture, blue is the color most associated with trust, authority, and stability — the police, military, and corporate world default to blue uniforms and identities. The United Nations flag uses blue for peace. In Christianity, blue is associated with the Virgin Mary — a tradition so powerful that blue became the quintessential 'good' color in Western culture. In Judaism, blue (tekhelet, a specific biblical blue from murex snails) appears in the tallit prayer shawl. In Hinduism, the supreme gods Vishnu and Krishna are depicted with blue skin — representing their all-pervasive, infinite nature. In Islam, the Blue Mosque's (Istanbul) 21,000 blue Iznik tiles created one of the world's most sublime color experiences. In Chinese culture, blue (combined with white in porcelain) represents the pinnacle of ceramic art.
Color Psychology
Blue is the world's most universally preferred color — surveys across dozens of countries consistently show blue is selected as a personal favorite by the largest plurality of respondents regardless of age, gender, or culture. Research explains this preference biologically: humans evolved in environments where blue sky and water signaled safety and abundance, while blue threats (storms, illness) were far rarer. Blue reduces blood pressure and heart rate, promotes calm and rational thinking, and enhances trust. Studies confirm blue environments improve work performance in tasks requiring analytical thinking. In consumer psychology, blue is the dominant color in banking, insurance, healthcare, and technology branding precisely because it triggers trust and reliability responses. Blue suppresses appetite (there are almost no blue foods in nature) — blue environments reduce eating by up to 33% in experiments.
Design Tips for Blue
Blue is the most versatile and universally reliable color in the designer's toolkit. From the pale sky (#38BDF8) to the deep ocean (#1E3A5F), every shade of blue communicates something valuable. For professional branding, #1D4ED8 or #1E40AF are the definitive trust-building blues. For creative and innovative brands, electric blue (#2563EB with a slight purple) projects forward-thinking energy. Blue works with virtually every other color: blue and orange (complementary), blue and yellow (classic), blue and green (analogous and fresh), blue and red (patriotic), blue and gray (corporate-professional). For web design, the entire Tailwind blue palette is accessible — blue-700 (#1D4ED8) and above all meet WCAG AA on white. In interior design, blue is the most reliable choice for creating calm, productive spaces. In data visualization, blue is the default 'primary series' color and works harmoniously with almost any secondary color. The most important design decision for blue is temperature: warm blue (slightly violet) feels creative; cool blue (slightly cyan) feels technical and clean.