Palettes / Colors / #FFFF40

#FFFF40 — Vivid Yellow

#FFFF40 is a yellow color we call Vivid Yellow, closest to the named color Yellow (#FFFF00). It belongs to the yellow family.

Color name

Closest CSS keyword: yellow (#FFFF00) — not an exact match. CSS yellow gives you #FFFF00, a different color; use #FFFF40 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.

#FFFF40 is a warm yellow color associated with optimism, attention and cheer. 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 #4242FF; it also sits naturally between #FFA142 and #A1FF42. 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 100% · Blue 25%

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

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

Previews

CSS code for #FFFF40

.text { color: #FFFF40; }
.background { background-color: #FFFF40; }
.border { border: 3px solid #FFFF40; }
.text-rgb { color: rgb(255, 255, 64); }
.text-hsl { color: hsl(60, 100%, 63%); }
.text-shadow-hex { text-shadow: 4px 4px 2px #FFFF40; }
.text-shadow-rgba { text-shadow: 4px 4px 2px rgba(255, 255, 64, 0.8); }
.box-shadow-hex { box-shadow: 1px 1px 3px 2px #FFFF40; }
.box-shadow-rgba { box-shadow: 1px 1px 3px 2px rgba(255, 255, 64, 0.8); }

HTML: <p style="color:#FFFF40">Text here</p> · <div style="background-color:#FFFF40">Div content here</div>

Shades of #FFFF40

Tints of #FFFF40

Tones of #FFFF40

Color harmonies

Complementary — #4242FF:

Analogous:

Triadic:

Contrast & accessibility

Best text color on #FFFF40: #000000.

Semi-transparent (opacity) text on #FFFF40

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 #FFFF40 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 #FFFF40 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

← #FFFF3F  ·  #FFFF41 →

Frequently asked questions

What color is #FFFF40?

#FFFF40 is Vivid Yellow, a yellow color (RGB 255, 255, 64). Its closest standard named color is Yellow.

What is the RGB and HSL of #FFFF40?

#FFFF40 is RGB 255, 255, 64 — HSL 60°, 100%, 63% — CMYK 0%, 0%, 75%, 0%.

What colors go with #FFFF40?

Its complement is #4242FF; analogous partners are #FFA142 and #A1FF42. It also appears in 6+ palettes in our collection.

Can I use #FFFF40 for text?

Black text on #FFFF40 has a contrast ratio of 19.63:1 (passes WCAG AA); white text gives 1.07:1.