Using blue well
Pair navy with warm amber for premium contrast, or sky blue with white for an airy, clinical cleanliness. Blue's complementary is orange — the classic call-to-action pairing on blue-heavy interfaces.
Need variations of a specific shade? Copy its hex into the palette generator for harmonies, or the contrast checker to verify text passes WCAG on top of it.
Frequently asked questions
What are the most popular shades of blue?
The classics are Navy, Midnight Blue, Prussian Blue, Sapphire, Royal Blue, Cobalt — the named swatches at the top of this page. Click any of them to copy the hex code.
What do the numbered shades (100–1000) mean?
They're a generated lightness scale of one representative hue, in the naming style design systems like Tailwind and Material use — low numbers dark, high numbers light. Use them as a ready-made UI ramp.
How do I get RGB or HSL instead of hex?
Copy the hex here, then paste it into our HEX to RGB converter — it returns RGB and HSL together, and the color picker gives sliders for fine-tuning.