Palettes / Colors / #EFEF43

#EFEF43 — Vivid Yellow

#EFEF43 is a yellow color we call Vivid Yellow, closest to the named color Yellow (#FFFF00). It belongs to the yellow family.

#EFEF43 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 #4343EF; it also sits naturally between #EF9943 and #99EF43. 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 94% · Green 94% · Blue 26%

Cyan 0% · Magenta 0% · Yellow 72% · Key 6%

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

Previews

CSS code for #EFEF43

.text { color: #EFEF43; }
.background { background-color: #EFEF43; }
.border { border: 3px solid #EFEF43; }
.text-rgb { color: rgb(239, 239, 67); }
.text-hsl { color: hsl(60, 84%, 60%); }
.text-shadow-hex { text-shadow: 4px 4px 2px #EFEF43; }
.text-shadow-rgba { text-shadow: 4px 4px 2px rgba(239, 239, 67, 0.8); }
.box-shadow-hex { box-shadow: 1px 1px 3px 2px #EFEF43; }
.box-shadow-rgba { box-shadow: 1px 1px 3px 2px rgba(239, 239, 67, 0.8); }

HTML: <p style="color:#EFEF43">Text here</p> · <div style="background-color:#EFEF43">Div content here</div>

Shades of #EFEF43

Tints of #EFEF43

Tones of #EFEF43

Color harmonies

Complementary — #4343EF:

Analogous:

Triadic:

Contrast & accessibility

Best text color on #EFEF43: #000000.

How #EFEF43 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 #EFEF43 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

← #EFEF42  ·  #EFEF44 →

Frequently asked questions

What color is #EFEF43?

#EFEF43 is Vivid Yellow, a yellow color (RGB 239, 239, 67). Its closest standard named color is Yellow.

What is the RGB and HSL of #EFEF43?

#EFEF43 is RGB 239, 239, 67 — HSL 60°, 84%, 60% — CMYK 0%, 0%, 72%, 6%.

What colors go with #EFEF43?

Its complement is #4343EF; analogous partners are #EF9943 and #99EF43. It also appears in 6+ palettes in our collection.

Can I use #EFEF43 for text?

Black text on #EFEF43 has a contrast ratio of 17.10:1 (passes WCAG AA); white text gives 1.23:1.