Named color
Blue Hour
#0034abrgb(0, 52, 171)hsl(222, 100%, 34%)oklch(0.391 0.195 262.9)Blue Hour 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 1 public brand that uses it and the palettes it appears in.
Colors that go with Blue Hour
Charcoal, Crimson and Steel 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 Hour: softer than #000 and cool enough to feel like part of the same palette.
Crimson #dc143c
triadicshippedCrimson completes a triad with Blue Hour — three hues spaced evenly round the wheel, the classic way to get energy into a palette without a clash.
Steel Blue #4682b4
analogousshippedSteel Blue is Blue Hour's neighbour on the wheel, so the two read as one family — use it for hover states, gradients and secondary surfaces.
Blue #0000ff
shipped5 real palettes, including Procter & Gamble's brand system and Pfizer's brand system put Blue beside Blue Hour, as the supporting colour.
Cornflower Blue #6495ed
shippedDesigners have shipped Cornflower Blue with Blue Hour: 6 real palettes, including Blue Mono and Gopro's brand system, as the supporting colour.
Denim #1560bd
shippedDesigners have shipped Denim with Blue Hour: 11 real palettes, including Warbyparker's brand system and Unilever's brand system, as the accent.
Dodger Blue #1e90ff
shippedDesigners have shipped Dodger Blue with Blue Hour: 5 real palettes, including Absolut's brand system and Coursera's brand system, as the supporting colour.
Firebrick #b22222
shippedDesigners have shipped Firebrick with Blue Hour: 4 real palettes, including 3M's brand system and MLB's brand system, as the supporting colour.
Real palettes that use Blue Hour
Tints & shades
Harmonies
Contrast
| Blue Hour as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 10.1:1 | pass | pass | pass | Passes AAA — no fix needed. |
Aaon black | 2.08:1 | 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 Hour as the background.
Brands using this color
Fonts for this mood
Blue Hour 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 #0034ab and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/0034ab-9ca3c4-df6e4e-211f2d-e9eff1?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