Palettes / Colors / #EFF231

#EFF231 — Vivid Yellow

#EFF231 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 #EFF231 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.

#EFF231 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 #3431F2; it also sits naturally between #F29531 and #8EF231. 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 94% · Green 95% · Blue 19%

Cyan 1% · Magenta 0% · Yellow 80% · Key 5%

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

Previews

CSS code for #EFF231

.text { color: #EFF231; }
.background { background-color: #EFF231; }
.border { border: 3px solid #EFF231; }
.text-rgb { color: rgb(239, 242, 49); }
.text-hsl { color: hsl(61, 88%, 57%); }
.text-shadow-hex { text-shadow: 4px 4px 2px #EFF231; }
.text-shadow-rgba { text-shadow: 4px 4px 2px rgba(239, 242, 49, 0.8); }
.box-shadow-hex { box-shadow: 1px 1px 3px 2px #EFF231; }
.box-shadow-rgba { box-shadow: 1px 1px 3px 2px rgba(239, 242, 49, 0.8); }

HTML: <p style="color:#EFF231">Text here</p> · <div style="background-color:#EFF231">Div content here</div>

Shades of #EFF231

Tints of #EFF231

Tones of #EFF231

Color harmonies

Complementary — #3431F2:

Analogous:

Triadic:

Contrast & accessibility

Best text color on #EFF231: #000000.

Semi-transparent (opacity) text on #EFF231

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 #EFF231 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 #EFF231 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

← #EFF230  ·  #EFF232 →

Frequently asked questions

What color is #EFF231?

#EFF231 is Vivid Yellow, a yellow color (RGB 239, 242, 49). Its closest standard named color is Yellow.

What is the RGB and HSL of #EFF231?

#EFF231 is RGB 239, 242, 49 — HSL 61°, 88%, 57% — CMYK 1%, 0%, 80%, 5%.

What colors go with #EFF231?

Its complement is #3431F2; analogous partners are #F29531 and #8EF231. It also appears in 6+ palettes in our collection.

Can I use #EFF231 for text?

Black text on #EFF231 has a contrast ratio of 17.42:1 (passes WCAG AA); white text gives 1.21:1.