Palettes / Colors / #DEFF27

#DEFF27 — Vivid Yellow

#DEFF27 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 #DEFF27 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.

#DEFF27 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 #4929FF; it also sits naturally between #FFB429 and #74FF29. 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 87% · Green 100% · Blue 15%

Cyan 13% · Magenta 0% · Yellow 85% · Key 0%

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

Previews

CSS code for #DEFF27

.text { color: #DEFF27; }
.background { background-color: #DEFF27; }
.border { border: 3px solid #DEFF27; }
.text-rgb { color: rgb(222, 255, 39); }
.text-hsl { color: hsl(69, 100%, 58%); }
.text-shadow-hex { text-shadow: 4px 4px 2px #DEFF27; }
.text-shadow-rgba { text-shadow: 4px 4px 2px rgba(222, 255, 39, 0.8); }
.box-shadow-hex { box-shadow: 1px 1px 3px 2px #DEFF27; }
.box-shadow-rgba { box-shadow: 1px 1px 3px 2px rgba(222, 255, 39, 0.8); }

HTML: <p style="color:#DEFF27">Text here</p> · <div style="background-color:#DEFF27">Div content here</div>

Shades of #DEFF27

Tints of #DEFF27

Tones of #DEFF27

Color harmonies

Complementary — #4929FF:

Analogous:

Triadic:

Contrast & accessibility

Best text color on #DEFF27: #000000.

Semi-transparent (opacity) text on #DEFF27

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 #DEFF27 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 #DEFF27 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

← #DEFF26  ·  #DEFF28 →

Frequently asked questions

What color is #DEFF27?

#DEFF27 is Vivid Yellow, a yellow color (RGB 222, 255, 39). Its closest standard named color is GreenYellow.

What is the RGB and HSL of #DEFF27?

#DEFF27 is RGB 222, 255, 39 — HSL 69°, 100%, 58% — CMYK 13%, 0%, 85%, 0%.

What colors go with #DEFF27?

Its complement is #4929FF; analogous partners are #FFB429 and #74FF29. It also appears in 6+ palettes in our collection.

Can I use #DEFF27 for text?

Black text on #DEFF27 has a contrast ratio of 18.44:1 (passes WCAG AA); white text gives 1.14:1.