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Color
#03253f
#03253f
hex
#03253frgb
rgb(3, 37, 63)hsl
hsl(206, 91%, 13%)oklch
oklch(0.256 0.062 246.3)Closest name: Dark Eclipse (#112244)Relative luminance 0.017
Colors that go with #03253f
Charcoal, Crimson and Royal 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 #03253f: softer than #000 and cool enough to feel like part of the same palette.
Crimson #dc143c
triadicshippedCrimson completes a triad with #03253f — three hues spaced evenly round the wheel, the classic way to get energy into a palette without a clash.
Royal Blue #4169e1
analogousshippedRoyal Blue is #03253f's neighbour on the wheel, so the two read as one family — use it for hover states, gradients and secondary surfaces.
Rust #b7410e
split-complementshippedRust is a split-complement of #03253f: nearly opposite, so it still pops against it, without the vibrating edge of a true complement.
Sienna #a0522d
complementaryshippedSienna sits directly opposite #03253f on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight.
Teal #008080
analogousshippedTeal is #03253f'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 #03253f in 18 real palettes, including Southwest Airlines's brand system and Beach Hut, as the accent.
Blue #0000ff
shipped24 real palettes, including Monzo's brand system and Sketch's brand system put Blue beside #03253f, as the accent.
Real palettes that use #03253f
Tints & shades
Harmonies
Contrast
| #03253f as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 15.67:1 | pass | pass | pass | Passes AAA — no fix needed. |
Aaon black | 1.34:1 | 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 #03253f as the background.
Brands using this color
Palettes built around it
Fonts for this mood
#03253f reads as cool, vivid, dark. The font library is tagged with the same vocabulary:
mcpConnect your agent — build around #03253f
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 #03253f and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
tool url
/palettes/new/03253f-9caec4-df4e56-1f212d-e9f1f1?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