Crayon Box
Open in tool →Red, teal and yellow at crayon saturation — joyful, but on white with black type so it stays readable for grown-ups.
Color
#fb5b50
#fb5b50
hex
#fb5b50rgb
rgb(251, 91, 80)hsl
hsl(4, 96%, 65%)oklch
oklch(0.682 0.197 27.5)Closest name: tomato (#ff6347)Relative luminance 0.2857
Colors that go with #fb5b50
Charcoal, Light Sea Green and Amber 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 #fb5b50: its slight blue cast keeps type crisp beside a warm colour where pure #000 looks heavy.
Light Sea Green #20b2aa
complementaryshippedLight Sea Green sits directly opposite #fb5b50 on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight.
Amber #ffbf00
shippedAmber is paired with #fb5b50 in 7 real palettes, including Ember and Heatwave, as the accent.
Blue #0000ff
shipped7 real palettes, including Monzo's brand system and Readymag's brand system put Blue beside #fb5b50, as the accent.
Cadet Blue #5f9ea0
shippedDesigners have shipped Cadet Blue with #fb5b50: 4 real palettes, including Alpine and Diner, as the supporting colour.
Cobalt Blue #0047ab
shippedDesigners have shipped Cobalt Blue with #fb5b50: 4 real palettes, including NASA's brand system and Tide's brand system, as the lead colour.
Crimson #dc143c
shippedCrimson is paired with #fb5b50 in 9 real palettes, including Snyk's brand system and Pizza Hut's brand system, as the lead colour.
Denim #1560bd
shippedDesigners have shipped Denim with #fb5b50: 14 real palettes, including Strava's brand system and Soundcloud's brand system, as the accent.
Real palettes that use #fb5b50
Tints & shades
Harmonies
Contrast
| #fb5b50 as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 3.13:1 | fail | pass | fail | |
Aaon black | 6.71:1 | 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 #fb5b50 as the background.
Brands using this color
Palettes built around it
Fonts for this mood
#fb5b50 reads as warm, vivid, playful. The font library is tagged with the same vocabulary:
mcpConnect your agent — build around #fb5b50
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 #fb5b50 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
tool url
/palettes/new/fb5b50-c4a39c-62cb9f-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