CSS color
blue
#0000ffrgb(0, 0, 255)hsl(240, 100%, 50%)oklch(0.452 0.313 264.1)Blue on this page is the real value, not a screenshot: exact hex, RGB, HSL and OKLCH, ten tints and ten shades, classic harmonies, and WCAG contrast with fixes — plus the 3 public brands that use it and the palettes it appears in.
Colors that go with blue
Charcoal, Crimson and Cobalt Blue lead the list. Each partner is a real named colour with the reason it works — a wheel relationship, a neutral that carries it, or a pairing lifted from a palette or brand system that actually shipped — and every pair opens in the palette tool.
Charcoal #36454f
neutralshippedCharcoal is the text near-black for blue: softer than #000 and cool enough to feel like part of the same palette.
Crimson #dc143c
triadicshippedCrimson completes a triad with blue — three hues spaced evenly round the wheel, the classic way to get energy into a palette without a clash.
Cobalt Blue #0047ab
shippedDesigners have shipped Cobalt Blue with blue: 9 real palettes, including CVS's brand system and Procter & Gamble's brand system, as the accent.
Denim #1560bd
shippedDesigners have shipped Denim with blue: 5 real palettes, including Activision's brand system and Pixar's brand system, as the supporting colour.
Dodger Blue #1e90ff
shippedDesigners have shipped Dodger Blue with blue: 6 real palettes, including Unity's brand system and Cargo's brand system, as the lead colour.
Midnight Blue #191970
shipped6 real palettes, including Monzo's brand system and Sketch's brand system put Midnight Blue beside blue, as the lead colour.
Orange Red #ff4500
shippedOrange Red is paired with blue in 7 real palettes, including Glossier's brand system and Doordash's brand system, as the supporting colour.
Red #ff0000
shippedRed is paired with blue in 4 real palettes, including Gap's brand system and native Cybersecurity's brand system, as the supporting colour.
Real palettes that use blue
Tints & shades
Harmonies
Contrast
| blue as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 8.59:1 | pass | pass | pass | Passes AAA — no fix needed. |
Aaon black | 2.44:1 | fail | fail | fail |
Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with blue as the background.
Brands using this color
Fonts for this mood
blue reads as cool, vivid, technical. The font library is tagged with the same vocabulary:
Point any MCP client at the shared colors endpoint and your agent gets the same engine as this page — direct_palette, edit_direction, check_palette, check_contrast — read-only, no key. Every direction it proposes comes with a /colors/d/… link: open it, lock what you like, paste the link back, and the agent edits rather than re-rolls.
https://mcp.brandsweets.com/colors/mcpclaude mcp add --transport http brandsweets-colors https://mcp.brandsweets.com/colors/mcp
›analyze #0000ff and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/0000ff-a19cc4-df994e-251f2d-e9edf1?lock=0&style=vibrantWant the agent to remember your picks and write them into a living brand? Create a free BrandSweets workspace.
Machine-readable: color.md