Palettes / Colors / #91EF57

#91EF57 — Vivid Green

#91EF57 is a green color we call Vivid Green, closest to the named color YellowGreen (#9ACD32). It belongs to the green family.

Color name

Closest CSS keyword: yellowgreen (#9ACD32) — not an exact match. CSS yellowgreen gives you #9ACD32, a different color; use #91EF57 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.

#91EF57 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 #B557EF; it also sits naturally between #DEEF57 and #57EF69. 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 57% · Green 94% · Blue 34%

Cyan 39% · Magenta 0% · Yellow 64% · Key 6%

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

Previews

CSS code for #91EF57

.text { color: #91EF57; }
.background { background-color: #91EF57; }
.border { border: 3px solid #91EF57; }
.text-rgb { color: rgb(145, 239, 87); }
.text-hsl { color: hsl(97, 83%, 64%); }
.text-shadow-hex { text-shadow: 4px 4px 2px #91EF57; }
.text-shadow-rgba { text-shadow: 4px 4px 2px rgba(145, 239, 87, 0.8); }
.box-shadow-hex { box-shadow: 1px 1px 3px 2px #91EF57; }
.box-shadow-rgba { box-shadow: 1px 1px 3px 2px rgba(145, 239, 87, 0.8); }

HTML: <p style="color:#91EF57">Text here</p> · <div style="background-color:#91EF57">Div content here</div>

Shades of #91EF57

Tints of #91EF57

Tones of #91EF57

Color harmonies

Complementary — #B557EF:

Analogous:

Triadic:

Contrast & accessibility

Best text color on #91EF57: #000000.

Semi-transparent (opacity) text on #91EF57

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 #91EF57 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 #91EF57 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

← #91EF56  ·  #91EF58 →

Frequently asked questions

What color is #91EF57?

#91EF57 is Vivid Green, a green color (RGB 145, 239, 87). Its closest standard named color is YellowGreen.

What is the RGB and HSL of #91EF57?

#91EF57 is RGB 145, 239, 87 — HSL 97°, 83%, 64% — CMYK 39%, 0%, 64%, 6%.

What colors go with #91EF57?

Its complement is #B557EF; analogous partners are #DEEF57 and #57EF69. It also appears in 6+ palettes in our collection.

Can I use #91EF57 for text?

Black text on #91EF57 has a contrast ratio of 14.69:1 (passes WCAG AA); white text gives 1.43:1.