Bright Green Color Codes

Bright Green is a very light, vivid green with the hex code #66FF00, RGB values of 102, 255, 0 and an HSL value of hsl(96, 100%, 50%).

HEX	#66FF00
RGB	102, 255, 0
HSL	hsl(96, 100%, 50%)
HSV	96°, 100%, 100%
CMYK	60%, 0%, 100%, 0%
LAB	89.08, -74.43, 84.82
CIELCHuv	89.08, 127.46, 122.76°

Nearest Pantone: PMS 375 C ΔE 29.2 · approximate
Nearest CSS name: chartreuse ΔE 6.5

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

Bright Green Color Hex Code

The Bright Green color hex code is #66FF00. Those six digits are three pairs, 66 for red, FF for green and 00 for blue, which is the same triplet a browser reads from the CSS value below.

#66FF00

Bright Green Color RGB Code

The Bright Green RGB code is rgb(102, 255, 0). Green carries the most light at 255 of 255, which is what puts this color where it sits on the wheel.

rgb(102, 255, 0)

Bright Green Color HSV Code

The Bright Green HSV code is 96°, 100%, 100%. Read it as a hue of 96 degrees, 100% saturation and 100% value, which is the form most color pickers use because moving one number changes one thing.

96°, 100%, 100%

Bright Green Color CIELChuv Code

The Bright Green CIELCHuv code is 89.08, 127.46, 122.76°. Unlike hex or RGB this one is perceptual: lightness 89 means light to the eye rather than to the screen, and chroma 127 is how far it sits from grey.

89.08, 127.46, 122.76°

Tonal scale

What are Bright Green 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 Bright Green Color Palette Codes?

Each of these is a hue rotation from #66FF00. They are generated, not curated, so they are exact.

Complementary

Rotate a half turn and you land on #9900FF, a dark, vivid violet. Maximum hue distance, which is what makes a complement read as emphasis rather than decoration. Both are saturated, so give the complement much less area than the base or the two will fight.

Analogous

Step 30 degrees in each direction and you get #E6FF00 and #00FF19. Neighbouring hues hold together without effort, which is what makes analogous sets the safe choice for large areas.

Triadic

#0066FF and #FF0066 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: #1900FF and #FF00E6. 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 #9900FF, and #00E6FF with #FF1900. The richest of the five and the hardest to balance, so treat this base 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

1.32:1

1.32

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	Fails	Fails
UI component needs 3:1	Fails	n/a

Black background

15.87:1

15.87

contrast ratio on black background

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

At 1.32:1 against white, Bright Green is a fill color rather than a text color. Use it for surfaces, borders and large display type, and set the copy in ink. Text placed on it should be black, which gives 15.87:1. 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 Bright Green against another color →

Color vision

How Bright Green 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

#BDBE87

Bright Green changes substantially here. ΔE 87.8

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

Deuteranopia

About 1% of men

actual

#B4A895

Bright Green changes substantially here. ΔE 107.2

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

#74B0B7

Bright Green changes substantially here. ΔE 112.3

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

#E0E0E0

Bright Green changes substantially here. ΔE 112.8

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, Bright Green reads as #B4A895. That is a shift of ΔE 107.2, so it is a different color to roughly one man in sixteen. It sits in the green range, the other half of the red-green pair. Against a red of similar lightness it will not read as distinct, so anything depending on that contrast needs a second cue. The widest shift is under tritanopia, at ΔE 112.3. 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 Bright Green in code

:root {
  --bright-green: #66FF00;
}

.example {
  color: var(--bright-green);
}

// tailwind.config.js
theme: {
  extend: {
    colors: {
      'bright-green': '#66FF00',
    },
  },
}

// SwiftUI takes 0–1 components, not 0–255.
let brightGreen = Color(
    red: 0.400,
    green: 1.000,
    blue: 0.000
)

<!-- res/values/colors.xml -->
<color name="bright_green">#66FF00</color>

// Flutter wants ARGB: FF for full opacity, then the hex.
const brightGreen = Color(0xFF66FF00);

Meaning

What is the Meaning of Bright Green Color?

Bright Green reads as calm and the outdoors. It is light enough to sit behind text rather than compete with it, and at 100% saturation with a perceptual lightness of 89 it behaves as a warm-leaning color, which is the practical reason it turns up where it does.

What are Other Names of Bright Green Color?

The closest CSS keyword is Chartreuse (#7FFF00), though it is not a match: Delta-E 6.5 means the difference is visible side by side. For print the nearest Pantone is PMS 375 C at #8CD600. The name Bright Green comes from the community color-name index rather than a standards body, so you will meet it under other names elsewhere.

How is Bright Green Color Made?

On a screen Bright Green is made by additive light: 102 red, 255 green and 0 blue out of 255, with green leading and 0 as the floor. In print it is subtractive instead, mixed as 60%, 0%, 100%, 0%. Starting from the pure hue at 96 degrees, Bright Green is close to the pure hue, with little white or black in it.