Color
#040a49
#040a49rgb(4, 10, 73)hsl(235, 90%, 15%)oklch(0.204 0.113 267)Colors that go with #040a49
Blue Violet, Charcoal and Sea Green 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.
Blue Violet #8a2be2
analogousshippedBlue Violet is #040a49's neighbour on the wheel, so the two read as one family — use it for hover states, gradients and secondary surfaces.
Charcoal #36454f
neutralshippedCharcoal is the text near-black for #040a49: softer than #000 and cool enough to feel like part of the same palette.
Sea Green #2e8b57
triadicshippedSea Green completes a triad with #040a49 — 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 #040a49's neighbour on the wheel, so the two read as one family — use it for hover states, gradients and secondary surfaces.
Amber #ffbf00
shippedAmber is paired with #040a49 in 13 real palettes, including Southwest Airlines's brand system and Blueprint, as the accent.
Blue #0000ff
shipped14 real palettes, including Penpot's brand system and League of Legends's brand system put Blue beside #040a49, as the supporting colour.
Cadet Blue #5f9ea0
shippedDesigners have shipped Cadet Blue with #040a49: 8 real palettes, including SoFi's brand system and Arctic, as the supporting colour.
Cobalt Blue #0047ab
shippedDesigners have shipped Cobalt Blue with #040a49: 17 real palettes, including Air France's brand system and Glacier, as the supporting colour.
Real palettes that use #040a49
Tints & shades
Harmonies
Contrast
| #040a49 as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 18.34:1 | pass | pass | pass | Passes AAA — no fix needed. |
Aaon black | 1.14:1 | 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 #040a49 as the background.
Brands using this color
Fonts for this mood
#040a49 reads as cool, vivid, dark. 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 #040a49 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/040a49-9e9cc4-df8d4e-241f2d-e9eef1?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