Color
#001538
#001538rgb(0, 21, 56)hsl(218, 100%, 11%)oklch(0.204 0.075 257.7)Colors that go with #001538
Blue Violet, Charcoal and Crimson 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 #001538'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 #001538: softer than #000 and cool enough to feel like part of the same palette.
Crimson #dc143c
triadicshippedCrimson completes a triad with #001538 — three hues spaced evenly round the wheel, the classic way to get energy into a palette without a clash.
Sienna #a0522d
complementaryshippedSienna sits directly opposite #001538 on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight.
Steel Blue #4682b4
analogousshippedSteel Blue is #001538'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 #001538 in 18 real palettes, including Blueprint and Southwest Airlines's brand system, as the accent.
Blue #0000ff
shipped19 real palettes, including Penpot's brand system and League of Legends's brand system put Blue beside #001538, as the supporting colour.
Brown #a52a2a
shipped5 real palettes, including State Farm's brand system and Velvet put Brown beside #001538, as the supporting colour.
Real palettes that use #001538
Tints & shades
Harmonies
Contrast
| #001538 as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 18.04:1 | pass | pass | pass | Passes AAA — no fix needed. |
Aaon black | 1.16:1 | 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 #001538 as the background.
Brands using this color
Fonts for this mood
#001538 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 #001538 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/001538-9ca6c4-df644e-201f2d-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