Palettes / Colors / #EFFE49

#EFFE49 — Vivid Yellow

#EFFE49 is a yellow color we call Vivid Yellow, closest to the named color GreenYellow (#ADFF2F). It belongs to the yellow family.

Color name

Closest CSS keyword: greenyellow (#ADFF2F) — not an exact match. CSS greenyellow gives you #ADFF2F, a different color; use #EFFE49 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.

#EFFE49 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 #5748FE; it also sits naturally between #FEB248 and #94FE48. 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 100% · Blue 29%

Cyan 6% · Magenta 0% · Yellow 71% · Key 0%

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

Previews

CSS code for #EFFE49

.text { color: #EFFE49; }
.background { background-color: #EFFE49; }
.border { border: 3px solid #EFFE49; }
.text-rgb { color: rgb(239, 254, 73); }
.text-hsl { color: hsl(65, 99%, 64%); }
.text-shadow-hex { text-shadow: 4px 4px 2px #EFFE49; }
.text-shadow-rgba { text-shadow: 4px 4px 2px rgba(239, 254, 73, 0.8); }
.box-shadow-hex { box-shadow: 1px 1px 3px 2px #EFFE49; }
.box-shadow-rgba { box-shadow: 1px 1px 3px 2px rgba(239, 254, 73, 0.8); }

HTML: <p style="color:#EFFE49">Text here</p> · <div style="background-color:#EFFE49">Div content here</div>

Shades of #EFFE49

Tints of #EFFE49

Tones of #EFFE49

Color harmonies

Complementary — #5748FE:

Analogous:

Triadic:

Contrast & accessibility

Best text color on #EFFE49: #000000.

Semi-transparent (opacity) text on #EFFE49

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 #EFFE49 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 #EFFE49 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

← #EFFE48  ·  #EFFE4A →

Frequently asked questions

What color is #EFFE49?

#EFFE49 is Vivid Yellow, a yellow color (RGB 239, 254, 73). Its closest standard named color is GreenYellow.

What is the RGB and HSL of #EFFE49?

#EFFE49 is RGB 239, 254, 73 — HSL 65°, 99%, 64% — CMYK 6%, 0%, 71%, 0%.

What colors go with #EFFE49?

Its complement is #5748FE; analogous partners are #FEB248 and #94FE48. It also appears in 6+ palettes in our collection.

Can I use #EFFE49 for text?

Black text on #EFFE49 has a contrast ratio of 18.94:1 (passes WCAG AA); white text gives 1.11:1.