Color
#03152b
#03152brgb(3, 21, 43)hsl(213, 87%, 9%)oklch(0.194 0.051 253.4)Colors that go with #03152b
Charcoal, Crimson and Rust 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 #03152b: softer than #000 and cool enough to feel like part of the same palette.
Crimson #dc143c
triadicshippedCrimson completes a triad with #03152b — three hues spaced evenly round the wheel, the classic way to get energy into a palette without a clash.
Rust #b7410e
split-complementshippedRust is a split-complement of #03152b: nearly opposite, so it still pops against it, without the vibrating edge of a true complement.
Sienna #a0522d
complementaryshippedSienna sits directly opposite #03152b on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight.
Slate Blue #6a5acd
analogousshippedSlate Blue is #03152b's neighbour on the wheel, so the two read as one family — use it for hover states, gradients and secondary surfaces.
Teal #008080
analogousshippedTeal is #03152b'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 #03152b in 18 real palettes, including Blueprint and Southwest Airlines's brand system, as the accent.
Blue #0000ff
shipped21 real palettes, including League of Legends's brand system and Monzo's brand system put Blue beside #03152b, as the supporting colour.
Real palettes that use #03152b
Tints & shades
Harmonies
Contrast
| #03152b as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 18.32:1 | pass | pass | pass | Passes AAA — no fix needed. |
Aaon black | 1.15:1 | 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 #03152b as the background.
Brands using this color
Fonts for this mood
#03152b 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 #03152b and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/03152b-9ca9c4-df584e-1f202d-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