Palettes / Colors / #91EF40

#91EF40 — Vivid Green

#91EF40 is a green color we call Vivid Green, closest to the named color GreenYellow (#ADFF2F). It belongs to the green family.

Color name

Closest CSS keyword: greenyellow (#ADFF2F) — not an exact match. CSS greenyellow gives you #ADFF2F, a different color; use #91EF40 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.

#91EF40 is a warm-leaning green color associated with growth, calm and balance. 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 #9C3EEF; it also sits naturally between #E9EF3E and #3EEF44. 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 57% · Green 94% · Blue 25%

Cyan 39% · Magenta 0% · Yellow 73% · Key 6%

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

Previews

CSS code for #91EF40

.text { color: #91EF40; }
.background { background-color: #91EF40; }
.border { border: 3px solid #91EF40; }
.text-rgb { color: rgb(145, 239, 64); }
.text-hsl { color: hsl(92, 85%, 59%); }
.text-shadow-hex { text-shadow: 4px 4px 2px #91EF40; }
.text-shadow-rgba { text-shadow: 4px 4px 2px rgba(145, 239, 64, 0.8); }
.box-shadow-hex { box-shadow: 1px 1px 3px 2px #91EF40; }
.box-shadow-rgba { box-shadow: 1px 1px 3px 2px rgba(145, 239, 64, 0.8); }

HTML: <p style="color:#91EF40">Text here</p> · <div style="background-color:#91EF40">Div content here</div>

Shades of #91EF40

Tints of #91EF40

Tones of #91EF40

Color harmonies

Complementary — #9C3EEF:

Analogous:

Triadic:

Contrast & accessibility

Best text color on #91EF40: #000000.

Semi-transparent (opacity) text on #91EF40

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 #91EF40 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 #91EF40 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

← #91EF3F  ·  #91EF41 →

Frequently asked questions

What color is #91EF40?

#91EF40 is Vivid Green, a green color (RGB 145, 239, 64). Its closest standard named color is GreenYellow.

What is the RGB and HSL of #91EF40?

#91EF40 is RGB 145, 239, 64 — HSL 92°, 85%, 59% — CMYK 39%, 0%, 73%, 6%.

What colors go with #91EF40?

Its complement is #9C3EEF; analogous partners are #E9EF3E and #3EEF44. It also appears in 6+ palettes in our collection.

Can I use #91EF40 for text?

Black text on #91EF40 has a contrast ratio of 14.62:1 (passes WCAG AA); white text gives 1.44:1.