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FF4000

#FF4000 Inferno Orange

#FF4000 is a medium, vivid red named Inferno Orange. In the RGB color model it is made of 100.0% red, 25.1% green and 0.0% blue (rgb(255, 64, 0)). Its HSL value is 15° hue, 100% saturation and 50% lightness, and in CMYK it is 0% cyan, 75% magenta, 100% yellow and 0% black. #FF4000 is a warm color. Black text reads best on it, with a contrast ratio of 5.99:1.

Make a palette with #FF4000

#FF4000 color conversion

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HSL
HSB / HSV
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CMYK
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CIELUV
OKLCH

Variations of #FF4000

Shades

Mixed with black: richer and darker.

FF4000DE3600BE2D009E2400801B00631300480B002E0500160100030000

Tints

Mixed with white: lighter and softer.

FF4000FF5B34FF724FFF8667FF997EFFAB94FFBCA9FFCDBEFFDED4FFEFE9

Tones

Mixed with gray: calmer and more muted.

FF4000F44D24E85735DC6042D0674EC46D57B87261AB76699D7A718F7D79

Hues

The same lightness and chroma, rotated around the color wheel.

EB3FB2F43999FA357FFE3563FF3B43FF4000EA6000DA7000CE7A00C28200B78900

Temperatures

Cooler on the left, warmer on the right.

DC6160E35C55EA5749F1503AF84927FF4000FF4401FF4801FF4C02FF5003FF5303

#FF4000 color harmonies

Complementary

The opposite hue — maximum contrast and energy.

FF400000BFFF
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Split complementary

The two hues next to the complement — contrast with less tension.

FF400000FFC00040FF
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Analogous

Neighbouring hues — calm, cohesive and natural.

FF4000FF0040FFC000
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Triadic

Three hues evenly spaced at 120° — vibrant yet balanced.

FF400000FF404000FF
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Tetradic

Two complementary pairs — rich, best with one dominant color.

FF4000BFFF0000BFFF4000FF
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Square

Four hues spaced at 90° — bold and playful.

FF400040FF0000BFFFC000FF
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#FF4000 for color-blind viewers (and dogs)

How #FF4000 appears with each type of color vision deficiency (Machado 2009 model) — and to your dog. Try the dog vision simulator →

  • Dog vision 57% similarHow dogs see it · simulated as #AC9800
  • Protanopia 51% similar1.3% of men, 0.02% of women · simulated as #7D6E00
  • Protanomaly 68% similar1.3% of men, 0.02% of women · simulated as #AE6A00
  • Deuteranopia 57% similar1.2% of men, 0.01% of women · simulated as #AC9800
  • Deuteranomaly 71% similar5% of men, 0.35% of women · simulated as #C88200
  • Tritanopia 88% similar0.001% of men, 0.03% of women · simulated as #FF0038
  • Tritanomaly 93% similar0.0001% of men, 0.0001% of women · simulated as #FF2424
  • Achromatopsia 53% similar0.003% of men, 0.003% of women · simulated as #898989
  • Achromatomaly 66% similar0.001% of men, 0.001% of women · simulated as #B17B78

#FF4000 contrast checker

AaThe quick brown fox jumps over the lazy dog.
3.51:1 Poor#FF4000 text on white
AA normalFailAAA normalFail
AA largePassAAA largeFail
AaThe quick brown fox jumps over the lazy dog.
5.99:1 Good#FF4000 text on black
AA normalPassAAA normalFail
AA largePassAAA largePass

Need another background? Pick any pair in the palette generator and open the contrast panel.

Colors similar to #FF4000

Palettes with #FF4000

#FF4000 in CSS

/* Inferno Orange */
.color { color: #FF4000; }
.background { background-color: #FF4000; }
.border { border: 1px solid #FF4000; }

/* Other notations */
color: rgb(255 64 0);
color: hsl(15 100% 50%);
color: oklch(0.656 0.233 34.5);

#FF4000 FAQ

What color is #FF4000?

#FF4000 is a medium, vivid red. Its closest named color is Inferno Orange. It belongs to the red color family and is a warm color.

What is the RGB value of #FF4000?

#FF4000 is rgb(255, 64, 0) in RGB, hsl(15, 100%, 50%) in HSL and cmyk(0%, 75%, 100%, 0%) in CMYK.

What is the complementary color of #FF4000?

The complementary color of #FF4000 is #00BFFF, which sits opposite it on the color wheel.

Which text color works on #FF4000?

Black text has the best contrast on #FF4000: 5.99:1, which meets the WCAG AA requirement of 4.5:1 for normal text.

Is #FF4000 a warm or cool color?

#FF4000 is a warm color.