#100721 Color

#100721 is rgb(16, 7, 33) in RGB, hsl(261, 65%, 8%) in HSL, and about cmyk(52%, 79%, 0%, 87%) in CMYK. It has no registered color name of its own — the closest is Deep Navy (#0B1F3A), visibly different at ΔE 12.08. White text is the more readable choice on this background.

#100721

HEX#100721

RGBrgb(16, 7, 33)

HSLhsl(261, 65%, 8%)

HSVhsv(261, 79%, 13%)

CMYKcmyk(52%, 79%, 0%, 87%)

OKLCHoklch(16% 0.053 296.2)

LABlab(3.25% 7.20 -14.43)

LCHlch(3.25% 16.13 296.53)

What #100721 Is Called

Most hex codes have no name: there are 16.7 million of them and a few thousand registered names. These are the named colors nearest to #100721, ordered by CIE76 distance in CIELAB. Anything under about ΔE 2 is a difference most people cannot see.

Deep Navy#0B1F3AΔE 12.08 Rich Black#010B13ΔE 12.99 Dark Purple#301934ΔE 13.09 Maastricht Blue#001C3DΔE 13.57 Jet Black#0A0A0AΔE 16.14 Vampire Black#080808ΔE 16.17

Browse the full index of named colors A-Z or every purple in the library.

#100721 Channel Values

How #100721 breaks down in each color model. Hue is measured in degrees around the color wheel; saturation, lightness, and the CMYK inks are percentages.

Model	Channels	Notes
RGB	R 16 · G 7 · B 33	8-bit channels as sent to the display
HSL	H 261° · S 65% · L 8%	Easiest model for building lighter and darker variants
HSV	H 261° · S 79% · V 13%	Matches the picker in most design tools
CMYK	C 52% · M 79% · Y 0% · K 87%	Approximate ink mix; confirm with an ICC profile before printing
Luminance	19.55:1 vs white · 1.07:1 vs black	WCAG 2.2 relative-luminance contrast ratios

Text Contrast & Accessibility

WCAG 2.2 contrast ratios for text on a #100721 background. AA requires 4.5:1 for normal text and 3:1 for large text; AAA requires 7:1. Contrast is one check, not a full accessibility review.

TextWhite text19.55:1AA normal AA large AAA normal

Fails AABlack text1.07:1AA normal AA large AAA normal

Need a specific ratio against another background? Open #100721 in the contrast checker.

Colors That Go With #100721

Pairings derived from color-wheel relationships. The complementary color sits opposite #100721; analogous colors sit beside it; triadic and split-complementary sets spread evenly around the wheel. Select any swatch for its own breakdown.

Base

Complementary

Analogous

Analogous

Triadic

Triadic

Split comp.

Split comp.

Tints & Shades of #100721

Lighter tints and darker shades built by moving the lightness channel while holding hue and saturation, which is what you want for hover states, backgrounds, and text variants.

Tints

Shades

#0E061D

#0C0519

#0A0415

Want a full 50-950 ramp with semantic roles? Generate design tokens from #100721.

How #100721 Looks with Color Vision Deficiency

Simulated with the Viénot, Brettel & Mollon LMS projection model. Anomalous types are rendered as partial versions of the matching dichromacy, which is an approximation rather than a per-person clinical model.

Typical#100721

Protanopia#090921

Protanomaly#0C0821

Deuteranopia#0A0A21

Deuteranomaly#0D0921

Tritanopia#0C0C0C

Tritanomaly#0D0A17

Achromatopsia#0C0C0C

Test a full palette in the color blindness simulator.

Using #100721 in Code

Copy-ready declarations for the places this color usually ends up.

CSS custom property--color-100721: #100721;

CSS backgroundbackground-color: #100721;

Tailwind configcolors: { 'color-100721': '#100721' }

SwiftUIColor(red: 0.063, green: 0.027, blue: 0.129)

Android XML<color name="color_100721">#100721</color>

SVG fillfill="#100721"

More Purple Colors

#100721 sits in the purple family. These are its neighbours across that family's full range, each with its own breakdown.

150024 fdf8ff 170b22 fdf4ff 1b0d35 faf5ff 1d0731 fae8ff 1e0033 f6cfff 20002e f3e8ff 300052 402060 541490 6600cc 7008e7 8806ce 9900cc a11fff b19cd9 c27aff cebeef e0b2eb

#100721 Frequently Asked Questions

What color is #100721?

#100721 is a darkest purple — rgb(16, 7, 33) in RGB and hsl(261, 65%, 8%) in HSL. It carries no registered color name of its own; the closest named color is Deep Navy (#0B1F3A), which is visibly different at a CIE76 distance of 12.08.

What is the RGB value of #100721?

#100721 is rgb(16, 7, 33) — red 16, green 7, and blue 33 on the 0-255 scale.

What is the CMYK value of #100721?

#100721 converts to approximately cmyk(52%, 79%, 0%, 87%). CMYK output is a mathematical approximation for planning; confirm production print colors with your printer and ICC profile.

Should text on #100721 be black or white?

White text is the more readable choice. #100721 scores 19.55:1 against white and 1.07:1 against black, and WCAG 2.2 asks for at least 4.5:1 for normal body text.

Can I write #100721 as a CSS color keyword?

No. #100721 is not one of the CSS color keywords, so it has to be written as a hex, rgb() or hsl() value. The closest keyword is black (#000000) at a CIE76 distance of 16.45, which is visibly different.

Open #100721 in a Tool

Hex to RGB Hex to HSL Hex to CMYK Hex to OKLCH Hex to Pantone Build a palette Make a gradient

Keep exploring: every purple in the color library, the guide to shades of purple, or the full color library.