Fluorescent Red Color Codes

Fluorescent Red is a mid-tone, vivid red with the hex code #FF5555, RGB values of 255, 85, 85 and an HSL value of hsl(0, 100%, 67%).

HEX	#FF5555
RGB	255, 85, 85
HSL	hsl(0, 100%, 67%)
HSV	0°, 67%, 100%
CMYK	0%, 67%, 67%, 0%
LAB	60.27, 64.21, 36.55
CIELCHuv	60.27, 132.94, 12.17°

Nearest Pantone: PMS 805 C ΔE 4.0 · approximate
Nearest CSS name: tomato ΔE 11.9

Community source color-name-list, community color-name index

Fluorescent Red Color Hex Code

The Fluorescent Red color hex code is #FF5555. Those six digits are three pairs, FF for red, 55 for green and 55 for blue, which is the same triplet a browser reads from the CSS value below.

#FF5555

Fluorescent Red Color RGB Code

The Fluorescent Red RGB code is rgb(255, 85, 85). Red carries the most light at 255 of 255, which is what puts this color where it sits on the wheel.

rgb(255, 85, 85)

Fluorescent Red Color HSV Code

The Fluorescent Red HSV code is 0°, 67%, 100%. Read it as a hue of 0 degrees, 67% saturation and 100% value, which is the form most color pickers use because moving one number changes one thing.

0°, 67%, 100%

Fluorescent Red Color CIELChuv Code

The Fluorescent Red CIELCHuv code is 60.27, 132.94, 12.17°. Unlike hex or RGB this one is perceptual: lightness 60 means mid-toned to the eye rather than to the screen, and chroma 133 is how far it sits from grey.

60.27, 132.94, 12.17°

Tonal scale

What are Fluorescent Red Color Palettes?

A shade mixes toward black, a tint toward white, a tone toward grey. Every step keeps the hue and is copy-ready.

Shades, toward black

Tints, toward white

Tones, toward grey

Open in the shades & tints generator →

Palettes

What are Fluorescent Red Color Palette Codes?

Each of these is a hue rotation from #FF5555. They are generated, not curated, so they are exact.

Complementary

Directly opposite sits #55FFFF, a very light, vivid teal. No other pairing separates two hues further, so this is the one to reach for when a single element has to win attention. Both are saturated, so give the complement much less area than the base or the two will fight.

Analogous

#FF55AA and #FFAA55 sit 30 degrees either side. All three share most of their hue, so the set reads as one family instead of three separate decisions. Good for backgrounds and for state variations that should not announce themselves.

Triadic

#55FF55 and #5555FF complete an even 120 degree split. Three fully independent hues, so one has to lead: keep this base dominant and let the other two appear in small quantities.

Split-complementary

Instead of the direct complement, this takes the two hues either side of it: #55FFAA and #55AAFF. Almost the same contrast, without the edge shimmer a true complementary pair produces at high saturation.

Tetradic

Two complementary pairs forming a rectangle: this base with #55FFFF, and #AAFF55 with #AA55FF. The richest of the five and the hardest to balance, so treat the darkest of the four as the lead and hold the other three well back.

See these on the color wheel →

Accessibility

Measured against white and against black, with a separate verdict for each element type. Small text, large text and UI components have different thresholds, so one pass or fail for the whole color would be wrong roughly a third of the time.

White background

3.14:1

3.14

contrast ratio on white background

Element	AA	AAA
Small text needs 4.5:1 / 7:1	Fails	Fails
Large text needs 3:1 / 4.5:1	Passes	Fails
UI component needs 3:1	Passes	n/a

Black background

6.68:1

6.68

contrast ratio on black background

Element	AA	AAA
Small text needs 4.5:1 / 7:1	Passes	Fails
Large text needs 3:1 / 4.5:1	Passes	Passes
UI component needs 3:1	Passes	n/a

Against white Fluorescent Red reaches 3.14:1, enough for large text and UI borders, but short of the 4.5:1 that body copy needs. Darken it for anything set small. Text placed on it should be black, which gives 6.68:1. It is a highly saturated color, so it will dominate anything it sits beside. Give it space rather than surrounding it with other strong colors.

Check Fluorescent Red against another color →

Color vision

How Fluorescent Red looks with color blindness

Around 300 million people see color differently from the way it is specified. Each card shows the actual color beside how it appears, and how common that form of vision is.

Protanopia

About 1% of men

actual

#CCCB55

Fluorescent Red changes substantially here. ΔE 84.0

No working red cones. Reds darken sharply and drift toward the same muddy olive as green.

Deuteranopia

About 1% of men

actual

#D4DE55

Fluorescent Red changes substantially here. ΔE 92.8

No working green cones. With the milder deuteranomaly at nearer 6% of men, this is by far the most common form, and the one worth designing around.

Tritanopia

About 1 in 10,000

actual

#FA5555

Fluorescent Red holds up almost unchanged here. ΔE 2.2

No working blue cones. Blues shift toward green and yellows toward pink. Rare, and unlike the others it is not sex-linked, so it affects men and women equally.

Achromatopsia

About 1 in 30,000

actual

#919191

Fluorescent Red changes substantially here. ΔE 73.9

No color vision at all. Also a fair proxy for how the color survives a greyscale print or a failing screen.

To a deuteranope, the most common form, Fluorescent Red reads as #D4DE55. That is a shift of ΔE 92.8, so it is a different color to roughly one man in sixteen. It sits in the red end of the spectrum, which is exactly where red-green deficiency does its damage. Never pair it with a green of similar lightness to signal a difference in meaning: to a large minority the two become one color. The widest shift is under deuteranopia, at ΔE 92.8. The rule this leads to needs no simulator: never let color be the only thing carrying a message. Add a label, an icon, or a clear difference in lightness, and the problem disappears for everyone.

Simulate a whole palette →

Snippets

Using Fluorescent Red in code

:root {
  --fluorescent-red: #FF5555;
}

.example {
  color: var(--fluorescent-red);
}

// tailwind.config.js
theme: {
  extend: {
    colors: {
      'fluorescent-red': '#FF5555',
    },
  },
}

// SwiftUI takes 0–1 components, not 0–255.
let fluorescentRed = Color(
    red: 1.000,
    green: 0.333,
    blue: 0.333
)

<!-- res/values/colors.xml -->
<color name="fluorescent_red">#FF5555</color>

// Flutter wants ARGB: FF for full opacity, then the hex.
const fluorescentRed = Color(0xFFFF5555);

Meaning

What is the Meaning of Fluorescent Red Color?

Fluorescent Red reads as urgency, appetite and alarm. It is saturated enough to dominate anything it sits beside, and at 100% saturation with a perceptual lightness of 60 it behaves as a warm color, which is the practical reason it turns up where it does.

What are Other Names of Fluorescent Red Color?

The closest CSS keyword is Tomato (#FF6347), though it is not a match: Delta-E 11.9 means the difference is visible side by side. For print the nearest Pantone is PMS 805 C at #F95951. The name Fluorescent Red comes from the community color-name index rather than a standards body, so you will meet it under other names elsewhere.

How is Fluorescent Red Color Made?

On a screen Fluorescent Red is made by additive light: 255 red, 85 green and 85 blue out of 255, with red leading and 85 as the floor. In print it is subtractive instead, mixed as 0%, 67%, 67%, 0%. Starting from the pure hue at 0 degrees, Fluorescent Red is close to the pure hue, with little white or black in it.