Palettes / Colors / #646C19

#646C19 — Deep Yellow

#646C19 is a yellow color we call Deep Yellow, closest to the named color DarkOliveGreen (#556B2F). It belongs to the yellow family.

Color name

Closest CSS keyword: darkolivegreen (#556B2F) — not an exact match. CSS darkolivegreen gives you #556B2F, a different color; use #646C19 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.

#646C19 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 #21196B; it also sits naturally between #6B4B19 and #3A6B19. 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 39% · Green 42% · Blue 10%

Cyan 7% · Magenta 0% · Yellow 77% · Key 58%

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

Previews

CSS code for #646C19

.text { color: #646C19; }
.background { background-color: #646C19; }
.border { border: 3px solid #646C19; }
.text-rgb { color: rgb(100, 108, 25); }
.text-hsl { color: hsl(66, 62%, 26%); }
.text-shadow-hex { text-shadow: 4px 4px 2px #646C19; }
.text-shadow-rgba { text-shadow: 4px 4px 2px rgba(100, 108, 25, 0.8); }
.box-shadow-hex { box-shadow: 1px 1px 3px 2px #646C19; }
.box-shadow-rgba { box-shadow: 1px 1px 3px 2px rgba(100, 108, 25, 0.8); }

HTML: <p style="color:#646C19">Text here</p> · <div style="background-color:#646C19">Div content here</div>

Shades of #646C19

Tints of #646C19

Tones of #646C19

Color harmonies

Complementary — #21196B:

Analogous:

Triadic:

Contrast & accessibility

Best text color on #646C19: #FFFFFF.

Semi-transparent (opacity) text on #646C19

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 #646C19 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 #646C19 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

← #646C18  ·  #646C1A →

Frequently asked questions

What color is #646C19?

#646C19 is Deep Yellow, a yellow color (RGB 100, 108, 25). Its closest standard named color is DarkOliveGreen.

What is the RGB and HSL of #646C19?

#646C19 is RGB 100, 108, 25 — HSL 66°, 62%, 26% — CMYK 7%, 0%, 77%, 58%.

What colors go with #646C19?

Its complement is #21196B; analogous partners are #6B4B19 and #3A6B19. It also appears in 6+ palettes in our collection.

Can I use #646C19 for text?

White text on #646C19 has a contrast ratio of 5.67:1 (passes WCAG AA); black text gives 3.70:1.