Color
#d23a37
#d23a37rgb(210, 58, 55)hsl(1, 63%, 52%)oklch(0.577 0.19 26.3)Colors that go with #d23a37
Charcoal, Royal Blue and Sea Green 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 #d23a37: 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 #d23a37 — 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 #d23a37 — 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 #d23a37: nearly opposite, so it still pops against it, without the vibrating edge of a true complement.
Amber #ffbf00
shippedAmber is paired with #d23a37 in 7 real palettes, including McDonald's's brand system and Trailhead, as the lead colour.
Blue #0000ff
shipped8 real palettes, including Tim Hortons's brand system and Doordash's brand system put Blue beside #d23a37, as the accent.
Cobalt Blue #0047ab
shippedDesigners have shipped Cobalt Blue with #d23a37: 5 real palettes, including Walgreens's brand system and Behance's brand system, as the accent.
Dark Olive Green #556b2f
shippedDark Olive Green shows up next to #d23a37 in 5 real palettes, including Farmers Market and Magazine Ochre, as the supporting colour.
Real palettes that use #d23a37
Tints & shades
Harmonies
Contrast
| #d23a37 as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 4.77:1 | pass | pass | fail |
|
Aaon black | 4.4:1 | fail | 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 #d23a37 as the background.
Brands using this color
Fonts for this mood
#d23a37 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 #d23a37 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/d23a37-c4a19c-62cb9a-2d261f-f1e9ed?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