OU Crimson Red (#990000)

The hex code for OU Crimson Red is #990000. It is rgb(153, 0, 0) in RGB, hsl(0, 100%, 30%) in HSL, and about cmyk(0%, 100%, 100%, 40%) in CMYK — a dark red. White text is the more readable choice on this background.

#990000

HEX#990000

RGBrgb(153, 0, 0)

HSLhsl(0, 100%, 30%)

HSVhsv(0, 100%, 60%)

CMYKcmyk(0%, 100%, 100%, 40%)

OKLCHoklch(42.9% 0.176 29.2)

LABlab(32.01% 55.19 46.81)

LCHlch(32.01% 72.36 40.30)

Colors Closest to OU Crimson Red

OU Crimson Red is a registered color name. These are the named colors nearest to it, measured as CIE76 distance in CIELAB — a perceptual scale, so the ordering matches what the eye sees rather than how close the raw RGB numbers happen to sit.

Rufous#A81C07ΔE 5.37 Dark Red#8B0000ΔE 6.37 Spartan Crimson#9E1316ΔE 8.19 Tomato Sauce#B21807ΔE 8.64 Mordant Red 19#AE0C00ΔE 8.74 Medium Red#B10304ΔE 9.38

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

#990000 Channel Values

How OU Crimson Red 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 153 · G 0 · B 0	8-bit channels as sent to the display
HSL	H 0° · S 100% · L 30%	Easiest model for building lighter and darker variants
HSV	H 0° · S 100% · V 60%	Matches the picker in most design tools
CMYK	C 0% · M 100% · Y 100% · K 40%	Approximate ink mix; confirm with an ICC profile before printing
Luminance	8.92:1 vs white · 2.35:1 vs black	WCAG 2.2 relative-luminance contrast ratios

Text Contrast & Accessibility

WCAG 2.2 contrast ratios for text on a OU Crimson Red 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 text8.92:1AA normal AA large AAA normal

Fails AABlack text2.35:1AA normal AA large AAA normal

Need a specific ratio against another background? Open #990000 in the contrast checker.

Colors That Go With OU Crimson Red

Pairings derived from color-wheel relationships. The complementary color sits opposite OU Crimson Red; 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 OU Crimson Red

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

Want a full 50-950 ramp with semantic roles? Generate design tokens from #990000.

How OU Crimson Red 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#990000

Protanopia#424200

Protanomaly#6F3300

Deuteranopia#5B5B00

Deuteranomaly#794700

Tritanopia#990000

Tritanomaly#990000

Achromatopsia#4A4A4A

Test a full palette in the color blindness simulator.

Using #990000 in Code

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

CSS custom property--ou-crimson-red: #990000;

CSS backgroundbackground-color: #990000;

Tailwind configcolors: { 'ou-crimson-red': '#990000' }

SwiftUIColor(red: 0.600, green: 0.000, blue: 0.000)

Android XML<color name="ou_crimson_red">#990000</color>

SVG fillfill="#990000"

More Red Colors

OU Crimson Red sits in the red family. These are its neighbours across that family's full range, each with its own breakdown.

990f00 98817b 991700 973a4a 993333 971212 995c5c 960018 996666 954535 9a4e40 940025 ae2029 c40233 d47373 e52b50 f0b2b2 fbd5dd ff3300 ff7961 ffcbc2 270707 553434 7a0000

#990000 Frequently Asked Questions

What is the hex code for OU Crimson Red?

The hex code for OU Crimson Red is #990000. That is rgb(153, 0, 0) in RGB, hsl(0, 100%, 30%) in HSL, and approximately cmyk(0%, 100%, 100%, 40%) in CMYK.

What is the RGB value of #990000?

#990000 is rgb(153, 0, 0) — red 153, green 0, and blue 0 on the 0-255 scale.

What is the CMYK value of #990000?

#990000 converts to approximately cmyk(0%, 100%, 100%, 40%). CMYK output is a mathematical approximation for planning; confirm production print colors with your printer and ICC profile.

Should text on #990000 be black or white?

White text is the more readable choice. #990000 scores 8.92:1 against white and 2.35:1 against black, and WCAG 2.2 asks for at least 4.5:1 for normal body text.

Can I write #990000 as a CSS color keyword?

No. #990000 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 darkred (#8B0000) at a CIE76 distance of 6.37, which is clearly related but distinguishable side by side.

Open OU Crimson Red 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 red in the color library, the guide to shades of red, or the full color library.