Royal Blue hex code
Royal Blue
#4169e1rgb(65, 105, 225)hsl(225, 73%, 57%)oklch(0.56 0.188 266.4)Royal Blue is a mid-tone, highly saturated indigo — #4169e1, rgb(65, 105, 225), hue 225° at 73% saturation. The colours that go with royal blue are Charcoal, Sea Green and Amber — each with the reason below, and the real palettes that pair them. As text it passes WCAG AA on white at 4.85:1, so it can be a body colour, not just a fill. 1 public brand uses it in a role token.
Colors that go with Royal Blue
Charcoal, 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 text near-black for Royal Blue: softer than #000 and cool enough to feel like part of the same palette.
Sea Green #2e8b57
triadicshippedSea Green completes a triad with Royal Blue — three hues spaced evenly round the wheel, the classic way to get energy into a palette without a clash.
Amber #ffbf00
shippedAmber is paired with Royal Blue in 10 real palettes, including Wikipedia's brand system and Walmart's brand system, as the accent.
Blue #0000ff
shipped14 real palettes, including BBC's brand system and EA's brand system put Blue beside Royal Blue, as the accent.
Cobalt Blue #0047ab
shippedDesigners have shipped Cobalt Blue with Royal Blue: 14 real palettes, including Carrefour's brand system and Nokia's brand system, as the accent.
Cornflower Blue #6495ed
shippedDesigners have shipped Cornflower Blue with Royal Blue: 6 real palettes, including Webflow's brand system and NBA's brand system, as the accent.
Crimson #dc143c
shippedCrimson is paired with Royal Blue in 16 real palettes, including Foot Locker's brand system and Pizza Hut's brand system, as the supporting colour.
Deep Sky Blue #00bfff
shippedDesigners have shipped Deep Sky Blue with Royal Blue: 7 real palettes, including Calm's brand system and Elastic's brand system, as the lead colour.
Real palettes that use Royal Blue
Tints & shades
Harmonies
Contrast
| Royal Blue as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 4.85:1 | pass | pass | fail |
|
Aaon black | 4.33:1 | 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 Royal Blue as the background.
Brands using this color
Fonts for this mood
Royal Blue reads as cool, vivid, technical. 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 #4169e1 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/4169e1-9ca1c4-df754e-221f2d-e9eff1?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