Palettes / Colors / #EFEC33

#EFEC33 — Vivid Yellow

#EFEC33 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 #EFEC33 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.

#EFEC33 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 #3437EF; it also sits naturally between #EF8E34 and #94EF34. 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 93% · Blue 20%

Cyan 0% · Magenta 1% · Yellow 79% · Key 6%

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

Previews

CSS code for #EFEC33

.text { color: #EFEC33; }
.background { background-color: #EFEC33; }
.border { border: 3px solid #EFEC33; }
.text-rgb { color: rgb(239, 236, 51); }
.text-hsl { color: hsl(59, 85%, 57%); }
.text-shadow-hex { text-shadow: 4px 4px 2px #EFEC33; }
.text-shadow-rgba { text-shadow: 4px 4px 2px rgba(239, 236, 51, 0.8); }
.box-shadow-hex { box-shadow: 1px 1px 3px 2px #EFEC33; }
.box-shadow-rgba { box-shadow: 1px 1px 3px 2px rgba(239, 236, 51, 0.8); }

HTML: <p style="color:#EFEC33">Text here</p> · <div style="background-color:#EFEC33">Div content here</div>

Shades of #EFEC33

Tints of #EFEC33

Tones of #EFEC33

Color harmonies

Complementary — #3437EF:

Analogous:

Triadic:

Contrast & accessibility

Best text color on #EFEC33: #000000.

Semi-transparent (opacity) text on #EFEC33

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 #EFEC33 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 #EFEC33 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

← #EFEC32  ·  #EFEC34 →

Frequently asked questions

What color is #EFEC33?

#EFEC33 is Vivid Yellow, a yellow color (RGB 239, 236, 51). Its closest standard named color is Yellow.

What is the RGB and HSL of #EFEC33?

#EFEC33 is RGB 239, 236, 51 — HSL 59°, 85%, 57% — CMYK 0%, 1%, 79%, 6%.

What colors go with #EFEC33?

Its complement is #3437EF; analogous partners are #EF8E34 and #94EF34. It also appears in 6+ palettes in our collection.

Can I use #EFEC33 for text?

Black text on #EFEC33 has a contrast ratio of 16.72:1 (passes WCAG AA); white text gives 1.26:1.