Color
#100538
#100538rgb(16, 5, 56)hsl(253, 84%, 12%)oklch(0.182 0.092 283)Colors that go with #100538
Charcoal, Denim 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 #100538: softer than #000 and cool enough to feel like part of the same palette.
Denim #1560bd
analogousshippedDenim is #100538's neighbour on the wheel, so the two read as one family — use it for hover states, gradients and secondary surfaces.
Rust #b7410e
triadicshippedRust completes a triad with #100538 — three hues spaced evenly round the wheel, the classic way to get energy into a palette without a clash.
Sea Green #2e8b57
triadicshippedSea Green completes a triad with #100538 — three hues spaced evenly round the wheel, the classic way to get energy into a palette without a clash.
Sienna #a0522d
split-complementshippedSienna is a split-complement of #100538: nearly opposite, so it still pops against it, without the vibrating edge of a true complement.
Amber #ffbf00
shippedAmber is paired with #100538 in 15 real palettes, including Southwest Airlines's brand system and Blueprint, as the accent.
Blue #0000ff
shipped19 real palettes, including Penpot's brand system and League of Legends's brand system put Blue beside #100538, as the supporting colour.
Blue Violet #8a2be2
shippedBlue Violet is paired with #100538 in 10 real palettes, including Gemstone and Twitch's brand system, as the supporting colour.
Real palettes that use #100538
Tints & shades
Harmonies
Contrast
| #100538 as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 19.08:1 | pass | pass | pass | Passes AAA — no fix needed. |
Aaon black | 1.1:1 | 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 #100538 as the background.
Brands using this color
Fonts for this mood
#100538 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 #100538 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/100538-a99cc4-dfb84e-281f2d-e9ebf1?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