Tabloid
Open in tool →Red, black and yellow on white is the loudest three-color system in print — use it when headlines are the product.
Color
#e51f3a
#e51f3a
hex
#e51f3argb
rgb(229, 31, 58)hsl
hsl(352, 79%, 51%)oklch
oklch(0.592 0.225 22.2)Closest name: Barberry (#ee1133)Relative luminance 0.1794
Colors that go with #e51f3a
Charcoal, Royal Blue 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 #e51f3a: its slight blue cast keeps type crisp beside a warm colour where pure #000 looks heavy.
Royal Blue #4169e1
triadicshippedRoyal Blue completes a triad with #e51f3a — 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 #e51f3a: nearly opposite, so it still pops against it, without the vibrating edge of a true complement.
Amber #ffbf00
shippedAmber is paired with #e51f3a in 7 real palettes, including Wired's brand system and McDonald's's brand system, as the accent.
Blue #0000ff
shipped8 real palettes, including native Cybersecurity's brand system and Doordash's brand system put Blue beside #e51f3a, as the accent.
Cobalt Blue #0047ab
shippedDesigners have shipped Cobalt Blue with #e51f3a: 5 real palettes, including Walgreens's brand system and NASA's brand system, as the accent.
Denim #1560bd
shippedDesigners have shipped Denim with #e51f3a: 18 real palettes, including Costco's brand system and Target : Expect More. Pay Less.'s brand system, as the supporting colour.
Dodger Blue #1e90ff
shippedDesigners have shipped Dodger Blue with #e51f3a: 6 real palettes, including Databricks's brand system and Google's brand system, as the accent.
Real palettes that use #e51f3a
Tints & shades
Harmonies
Contrast
| #e51f3a as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 4.58:1 | pass | pass | fail |
|
Aaon black | 4.59:1 | 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 #e51f3a as the background.
Brands using this color
- Costcoprimary · #e31837 · Δ0.72
- Walgreensprimary · #e31836 · Δ0.744
- AliExpresssecondary · #ea0934 · Δ1.194
- Pepsisecondary · #e32934 · Δ1.195
- Tiffany & Co.secondary · #e50739 · Δ1.199
- Formula 1accent · #e8002d · Δ1.469
- Pringlessecondary · #ea002a · Δ1.688
- KFCprimary · #e4002b · Δ1.72
- KFCsecondary · #e4002b · Δ1.72
- NASCARsecondary · #e4002b · Δ1.72
- Marvelaccent · #e62429 · Δ1.788
- Wendy'sprimary · #dd1438 · Δ1.984
Palettes built around it
Gemstone
Open in tool →Emerald, amethyst and ruby on velvet-black — the jewel-tone trio; the surface must be dark or the stones go plastic.
Fonts for this mood
#e51f3a reads as warm, vivid, playful. The font library is tagged with the same vocabulary:
mcpConnect your agent — build around #e51f3a
live endpointPoint 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.
endpoint
https://mcp.brandsweets.com/colors/mcpclaude mcp add --transport http brandsweets-colors https://mcp.brandsweets.com/colors/mcp
try this prompt
›analyze #e51f3a and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
tool url
/palettes/new/e51f3a-c49c9d-62cb8a-2d231f-f1e9ee?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