Color
#100312
#100312rgb(16, 3, 18)hsl(292, 71%, 4%)oklch(0.135 0.043 322.9)Colors that go with #100312
Charcoal, Sea Green and Sienna 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 #100312: softer than #000 and cool enough to feel like part of the same palette.
Sea Green #2e8b57
complementaryshippedSea Green sits directly opposite #100312 on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight.
Sienna #a0522d
triadicshippedSienna completes a triad with #100312 — three hues spaced evenly round the wheel, the classic way to get energy into a palette without a clash.
Slate Blue #6a5acd
analogousshippedSlate Blue is #100312's neighbour on the wheel, so the two read as one family — use it for hover states, gradients and secondary surfaces.
Teal #008080
split-complementshippedTeal is a split-complement of #100312: nearly opposite, so it still pops against it, without the vibrating edge of a true complement.
Amber #ffbf00
shippedAmber is paired with #100312 in 16 real palettes, including Southwest Airlines's brand system and Ember, as the accent.
Blue #0000ff
shipped17 real palettes, including Pfizer's brand system and Glossier's brand system put Blue beside #100312, as the supporting colour.
Blue Violet #8a2be2
shippedBlue Violet is paired with #100312 in 10 real palettes, including Gemstone and Circuit, as the supporting colour.
Real palettes that use #100312
Tints & shades
Harmonies
Contrast
| #100312 as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 20.12:1 | pass | pass | pass | Passes AAA — no fix needed. |
Aaon black | 1.04:1 | 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 #100312 as the background.
Brands using this color
No public brand in the corpus uses this exact color yet. Extract a brand to add one.
Fonts for this mood
#100312 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 #100312 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/100312-c09fc1-a3cb62-2d1f29-ece9f1?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