Palettes / Colors / #FFEF17

#FFEF17 — Vivid Yellow

#FFEF17 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 #FFEF17 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.

#FFEF17 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 #1A29FF; it also sits naturally between #FF7D1A and #9CFF1A. In the palettes below you can see it working alongside real color combinations from our collection.

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Color values

RGB & CMYK percentages

Red 100% · Green 94% · Blue 9%

Cyan 0% · Magenta 6% · Yellow 91% · Key 0%

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

Previews

CSS code for #FFEF17

.text { color: #FFEF17; }
.background { background-color: #FFEF17; }
.border { border: 3px solid #FFEF17; }
.text-rgb { color: rgb(255, 239, 23); }
.text-hsl { color: hsl(56, 100%, 55%); }
.text-shadow-hex { text-shadow: 4px 4px 2px #FFEF17; }
.text-shadow-rgba { text-shadow: 4px 4px 2px rgba(255, 239, 23, 0.8); }
.box-shadow-hex { box-shadow: 1px 1px 3px 2px #FFEF17; }
.box-shadow-rgba { box-shadow: 1px 1px 3px 2px rgba(255, 239, 23, 0.8); }

HTML: <p style="color:#FFEF17">Text here</p> · <div style="background-color:#FFEF17">Div content here</div>

Shades of #FFEF17

Tints of #FFEF17

Tones of #FFEF17

Color harmonies

Complementary — #1A29FF:

Analogous:

Triadic:

Contrast & accessibility

Best text color on #FFEF17: #000000.

Semi-transparent (opacity) text on #FFEF17

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 #FFEF17 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 #FFEF17 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

← #FFEF16  ·  #FFEF18 →

Frequently asked questions

What color is #FFEF17?

#FFEF17 is Vivid Yellow, a yellow color (RGB 255, 239, 23). Its closest standard named color is Yellow.

What is the RGB and HSL of #FFEF17?

#FFEF17 is RGB 255, 239, 23 — HSL 56°, 100%, 55% — CMYK 0%, 6%, 91%, 0%.

What colors go with #FFEF17?

Its complement is #1A29FF; analogous partners are #FF7D1A and #9CFF1A. It also appears in 6+ palettes in our collection.

Can I use #FFEF17 for text?

Black text on #FFEF17 has a contrast ratio of 17.61:1 (passes WCAG AA); white text gives 1.19:1.