Color
#f51d05
#f51d05rgb(245, 29, 5)hsl(6, 96%, 49%)oklch(0.617 0.243 30.3)Colors that go with #f51d05
Charcoal, Sea Green and Steel 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 body-text near-black for #f51d05: its slight blue cast keeps type crisp beside a warm colour where pure #000 looks heavy.
Sea Green #2e8b57
triadicshippedSea Green completes a triad with #f51d05 — three hues spaced evenly round the wheel, the classic way to get energy into a palette without a clash.
Steel Blue #4682b4
split-complementshippedSteel Blue is a split-complement of #f51d05: nearly opposite, so it still pops against it, without the vibrating edge of a true complement.
Amber #ffbf00
shippedAmber is paired with #f51d05 in 7 real palettes, including Wired's brand system and Google's brand system, as the accent.
Blue #0000ff
shipped8 real palettes, including native Cybersecurity's brand system and Gap's brand system put Blue beside #f51d05, as the accent.
Cobalt Blue #0047ab
shippedDesigners have shipped Cobalt Blue with #f51d05: 4 real palettes, including Walgreens's brand system and NASA's brand system, as the accent.
Denim #1560bd
shippedDesigners have shipped Denim with #f51d05: 17 real palettes, including L'Oréal's brand system and YouTube's brand system, as the accent.
Dodger Blue #1e90ff
shippedDesigners have shipped Dodger Blue with #f51d05: 7 real palettes, including Databricks's brand system and Google's brand system, as the accent.
Real palettes that use #f51d05
Tints & shades
Harmonies
Contrast
| #f51d05 as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 4.15:1 | fail | pass | fail | |
Aaon black | 5.06:1 | pass | pass | fail |
|
Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #f51d05 as the background.
Brands using this color
- native Cybersecurityprimary · #fc0404 · Δ1.428
- Pizza Hutprimary · #ee3124 · Δ1.852
- 3Mprimary · #ff0000 · Δ1.918
- Gapsecondary · #ff0000 · Δ1.918
- Heinekenaccent · #ff0000 · Δ1.918
- L'Oréalsecondary · #ff0000 · Δ1.918
- Logitechsecondary · #ff0000 · Δ1.918
- Paddlesecondary · #ff0000 · Δ1.918
- YouTubeprimary · #ff0000 · Δ1.918
- Tindersecondary · #ec180e · Δ1.959
Fonts for this mood
#f51d05 reads as warm, vivid, playful. 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 #f51d05 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/f51d05-c4a59c-62cba3-2d271f-f1e9ec?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