Dusk
Open in tool →Slate blue with a copper accent — calm, professional, slightly editorial; suits consultancies and journals.
Color
#415a8b
#415a8b
hex
#415a8brgb
rgb(65, 90, 139)hsl
hsl(220, 36%, 40%)oklch
oklch(0.47 0.086 262.9)Closest name: Dusk (#4e5481)Relative luminance 0.103
Colors that go with #415a8b
Charcoal, Sea Green 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 #415a8b: softer than #000 and cool enough to feel like part of the same palette.
Sea Green #2e8b57
triadicshippedSea Green completes a triad with #415a8b — 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 #415a8b's neighbour on the wheel, so the two read as one family — use it for hover states, gradients and secondary surfaces.
Sienna #a0522d
complementaryshippedSienna sits directly opposite #415a8b on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight.
Amber #ffbf00
shippedAmber is paired with #415a8b in 5 real palettes, including McDonald's's brand system and Warner Bros.'s brand system, as the lead colour.
Blue #0000ff
shipped6 real palettes, including Tesco's brand system and Activision's brand system put Blue beside #415a8b, as the supporting colour.
Crimson #dc143c
shippedCrimson is paired with #415a8b in 16 real palettes, including Costco's brand system and Walgreens's brand system, as the lead colour.
Deep Sky Blue #00bfff
shippedDesigners have shipped Deep Sky Blue with #415a8b: 4 real palettes, including Venmo's brand system and Deep Water, as the supporting colour.
Real palettes that use #415a8b
Tints & shades
Harmonies
Contrast
| #415a8b as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 6.86:1 | pass | pass | fail |
|
Aaon black | 3.06:1 | fail | pass | fail |
Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #415a8b as the background.
Brands using this color
No public brand in the corpus uses this exact color yet. Extract a brand to add one.
Palettes built around it
Fonts for this mood
#415a8b reads as cool, modern. The font library is tagged with the same vocabulary:
mcpConnect your agent — build around #415a8b
live endpointPoint 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.
endpoint
https://mcp.brandsweets.com/colors/mcpclaude mcp add --transport http brandsweets-colors https://mcp.brandsweets.com/colors/mcp
try this prompt
›analyze #415a8b and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
tool url
/palettes/new/415a8b-9ca5c4-df694e-211f2d-e9f0f1?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