Palettes / Colors / #FF403B

#FF403B — Vivid Red

#FF403B is a red color we call Vivid Red, closest to the named color Tomato (#FF6347). It belongs to the red family.

Color name

Closest CSS keyword: tomato (#FF6347) — not an exact match. CSS tomato gives you #FF6347, a different color; use #FF403B when you need this exact shade.

Sources: common names follow widely used color-name references; CSS keywords and their hex values follow the CSS Color specification.

#FF403B is a warm red color associated with energy, passion and urgency. It is saturated enough to be the accent — buttons, highlights and calls to action — while neutrals do the quiet work around it.

Its strongest partner is its complement #3DF9FF; it also sits naturally between #FF3D98 and #FFA53D. In the palettes below you can see it working alongside real color combinations from our collection.

Copy HEX Copy RGB Copy HSL Download PNG swatch SVG

Color values

RGB & CMYK percentages

Red 100% · Green 25% · Blue 23%

Cyan 0% · Magenta 75% · Yellow 77% · Key 0%

CMYK values are unprofiled approximations for screen reference — not a print-proofing guarantee.

Previews

CSS code for #FF403B

.text { color: #FF403B; }
.background { background-color: #FF403B; }
.border { border: 3px solid #FF403B; }
.text-rgb { color: rgb(255, 64, 59); }
.text-hsl { color: hsl(2, 100%, 62%); }
.text-shadow-hex { text-shadow: 4px 4px 2px #FF403B; }
.text-shadow-rgba { text-shadow: 4px 4px 2px rgba(255, 64, 59, 0.8); }
.box-shadow-hex { box-shadow: 1px 1px 3px 2px #FF403B; }
.box-shadow-rgba { box-shadow: 1px 1px 3px 2px rgba(255, 64, 59, 0.8); }

HTML: <p style="color:#FF403B">Text here</p> · <div style="background-color:#FF403B">Div content here</div>

Shades of #FF403B

Tints of #FF403B

Tones of #FF403B

Color harmonies

Complementary — #3DF9FF:

Analogous:

Triadic:

Contrast & accessibility

Best text color on #FF403B: #000000.

Semi-transparent (opacity) text on #FF403B

Text set with opacity blends into the background, so its real contrast is lower than the solid ratios above. Choose a text color and an opacity to see the blended color and its true ratio:

How #FF403B looks with color blindness

Simulated with standard Machado color-vision-deficiency matrices — useful when this color carries meaning in charts, maps or interfaces:

Closest design-system colors

The nearest matches in the Tailwind CSS, Material Design and Bootstrap palettes — handy when you need a framework class instead of a raw hex:

Palettes with a similar color

These palettes use a close neighbour of #FF403B rather than the exact color:

Similar colors

The closest colors that actually appear in our palette collection — click any to open its page:

Browse neighbouring colors

← #FF403A  ·  #FF403C →

Frequently asked questions

What color is #FF403B?

#FF403B is Vivid Red, a red color (RGB 255, 64, 59). Its closest standard named color is Tomato.

What is the RGB and HSL of #FF403B?

#FF403B is RGB 255, 64, 59 — HSL 2°, 100%, 62% — CMYK 0%, 75%, 77%, 0%.

What colors go with #FF403B?

Its complement is #3DF9FF; analogous partners are #FF3D98 and #FFA53D. It also appears in 6+ palettes in our collection.

Can I use #FF403B for text?

Black text on #FF403B has a contrast ratio of 6.05:1 (passes WCAG AA); white text gives 3.47:1.