Color
#150c8d
#150c8drgb(21, 12, 141)hsl(244, 84%, 30%)oklch(0.307 0.19 269.5)Colors that go with #150c8d
Steel Blue, Charcoal 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.
Steel Blue #4682b4
analogousshippedSteel Blue is #150c8d'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 #150c8d: softer than #000 and cool enough to feel like part of the same palette.
Cobalt Blue #0047ab
shippedCobalt Blue is paired with #150c8d in 4 real palettes, including Purina Pro Plan's brand system and Tide's brand system, as the accent — a combination designers have actually shipped, not a computed rotation.
Crimson #dc143c
triadicshippedCrimson completes a triad with #150c8d — three hues spaced evenly round the wheel, the classic way to get energy into a palette without a clash.
Olive Green #808000
complementaryOlive Green sits directly opposite #150c8d on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight.
Blue #0000ff
shippedBlue is paired with #150c8d in 3 real palettes, including Pepsi's brand system and Procter & Gamble's brand system, as the supporting colour — a combination designers have actually shipped, not a computed rotation.
Denim #1560bd
shippedDenim is paired with #150c8d in 3 real palettes, including Google's brand system and Bank of America's brand system, as the accent — a combination designers have actually shipped, not a computed rotation.
Light Sea Green #20b2aa
shippedLight Sea Green is paired with #150c8d in 3 real palettes, including Ford's brand system and Confluent's brand system, as the supporting colour — a combination designers have actually shipped, not a computed rotation.
Real palettes that use #150c8d
Tints & shades
Harmonies
Contrast
| #150c8d as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 14.29:1 | pass | pass | pass | Passes AAA — no fix needed. |
Aaon black | 1.47:1 | 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 #150c8d as the background.
Brands using this color
Fonts for this mood
#150c8d 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 #150c8d and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/150c8d-a39cc4-dfa24e-261f2d-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