Color
#28105b
#28105brgb(40, 16, 91)hsl(259, 70%, 21%)oklch(0.265 0.123 289.8)Colors that go with #28105b
Charcoal, Royal Blue and Teal 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 #28105b: softer than #000 and cool enough to feel like part of the same palette.
Royal Blue #4169e1
analogousshippedRoyal Blue is #28105b's neighbour on the wheel, so the two read as one family — use it for hover states, gradients and secondary surfaces.
Teal #008080
triadicshippedTeal completes a triad with #28105b — three hues spaced evenly round the wheel, the classic way to get energy into a palette without a clash.
Blue #0000ff
shipped5 real palettes, including Sketch's brand system and Penpot's brand system put Blue beside #28105b, as the accent.
Cadet Blue #5f9ea0
shippedDesigners have shipped Cadet Blue with #28105b: 6 real palettes, including SoFi's brand system and Open House, as the supporting colour.
Cobalt Blue #0047ab
shippedDesigners have shipped Cobalt Blue with #28105b: 8 real palettes, including Blue Mono and Glacier, as the lead colour.
Cornflower Blue #6495ed
shippedDesigners have shipped Cornflower Blue with #28105b: 4 real palettes, including Blue Mono and Arctic, as the supporting colour.
Crimson #dc143c
shippedCrimson is paired with #28105b in 8 real palettes, including Nintendo's brand system and Casper Sleep's brand system, as the supporting colour.
Real palettes that use #28105b
Tints & shades
Harmonies
Contrast
| #28105b as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 15.96:1 | pass | pass | pass | Passes AAA — no fix needed. |
Aaon black | 1.32:1 | 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 #28105b 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
#28105b 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 #28105b and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/28105b-ad9cc4-dfc74e-2a1f2d-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