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green · neutral

#ace178

a light, vivid green · neutral · closest name: Light Green

Token name suggestion: Morning Moss

RGB
172, 225, 120
HSL
90°, 64%, 68%
CMYK
24, 0, 47, 12
Luminance
0.6398

#ace178 is a light vivid green, 90° on the wheel and 50/100 on the cool side. Put black text on it (13.80:1). As text it scores 1.52:1 on white — use #50841D instead. Nearest name is Light Green, nearest Tailwind family is lime.

hsl(90 64% 68%)rgb(172 225 120)Base step 400AAA inkNeutral

At a glance

Every number on this page in one read: what #ace178 is made of, how bright it looks, and which way it leans.

Hex
#ace178
Hue
90°
green
Saturation
64%
vivid
Lightness
68%
light
Brightness
88%
HSV value
Perceived
79%
weighted brightness
Luminance
0.6398
WCAG relative
Temperature
Neutral
50/100 cool
Color family
Green
Tone
Vivid
Best ink
Black
13.80:1
Closest name
Light Green
ΔE2000 7
Chroma
57.3
LCH, 0–130ish
OKLCH L
0.850
perceptual lightness
Tailwind
lime
500 · ΔE 9.4
Web-safe
#99CC66
nearest of 216
Where it sits
Hue90° of 360°
Saturation64%
Lightness68%
Saturation × lightness field

Left edge is grey, right edge is full chroma; top is white, bottom is black. The dot is #ace178.

Temperature
Warm ← → Cool50% cool

Reads neutral. Warm and cool siblings keep the same lightness, so you can swap one in without redoing your contrast maths.

Luminance by channel
Red14%
Green84%
Blue2%

Green carries most of what the eye calls brightness — that is why WCAG weights it 0.7152.

Every format

HEX#ace178
HEX (8-digit)#ace178ff
RGBrgb(172, 225, 120)
RGBArgba(172, 225, 120, 1)
HSLhsl(90, 64%, 68%)
HSV / HSBhsv(90, 47%, 88%)
HWBhwb(90 47% 12%)
CMYKcmyk(24%, 0%, 47%, 12%)
LABlab(84.0 -34.5 45.7)
LCHlch(84.0 57.3 127.1)
OKLCHoklch(0.850 0.146 130.9)
XYZ (D65)xyz(47.33, 63.98, 27.62)
Decimal11329912
Display P3color(display-p3 0.675 0.882 0.471)
Web-safe#99CC66

Copy-ready code

every platformclick to select
/* CSS */
color: #ace178;
background-color: #ace178;
/* CSS custom property */
--brand: #ace178;
/* Tailwind (arbitrary) */
class="text-[#ace178] bg-[#ace178]"
/* SCSS */
$brand: #ace178;
/* SwiftUI */
Color(red: 0.675, green: 0.882, blue: 0.471)
/* UIKit */
UIColor(red: 0.675, green: 0.882, blue: 0.471, alpha: 1)
/* Android XML */
<color name="brand">#ACE178</color>
/* Android Compose */
Color(0xFFACE178)
/* Flutter */
Color(0xFFACE178)
/* Python / OpenCV (BGR) */
(120, 225, 172)
/* Python / PIL (RGB) */
(172, 225, 120)
/* Java AWT */
new Color(172, 225, 120)
/* .NET */
Color.FromArgb(255, 172, 225, 120)
/* OpenGL / Unity (0–1) */
(0.6745f, 0.8824f, 0.4706f, 1f)
/* LaTeX */
\definecolor{brand}{RGB}{172,225,120}
modern cssclick to select
/* mix without leaving CSS */
background: color-mix(in oklab, #ace178 85%, white);
border-color: color-mix(in oklab, #ace178 40%, transparent);
/* theme-aware in one line */
color: light-dark(#3F6817, #E0EED3);
/* relative colour syntax */
--hover: hsl(from #ace178 h s calc(l - 7));

Design tokens

The same ramp in the four formats a team actually needs. Paste one and the whole palette lands with it.

css custom propertiesclick to select
:root {
  --brand-50: #F7FBF4;
  --brand-100: #F0F7E8;
  --brand-200: #DEF0CB;
  --brand-300: #C7EBA3;
  --brand-400: #ace178;
  --brand-500: #8ED647;
  --brand-600: #7AC82D;
  --brand-700: #65A725;
  --brand-800: #51851E;
  --brand-900: #3D6119;
  --brand-950: #263D10;
  --brand: #ace178;
  --brand-ink: #000000;
  --brand-surface: #F7FAF4;
  --brand-border: #D6EDC0;
  --brand-hover: #9ADA5B;
  --brand-pressed: #88D43D;
}
@media (prefers-color-scheme: dark) {
  :root {
    --brand-surface: #1C2414;
    --brand-ink: #E0EED3;
  }
}
tailwind.config.jsclick to select
theme: {
  extend: {
    colors: {
      brand: {
        50: '#F7FBF4',
        100: '#F0F7E8',
        200: '#DEF0CB',
        300: '#C7EBA3',
        400: '#ace178',
        500: '#8ED647',
        600: '#7AC82D',
        700: '#65A725',
        800: '#51851E',
        900: '#3D6119',
        950: '#263D10',
        DEFAULT: '#ace178',
      },
    },
  },
}
scss mapclick to select
$brand: (
  '50': #F7FBF4,
  '100': #F0F7E8,
  '200': #DEF0CB,
  '300': #C7EBA3,
  '400': #ace178,
  '500': #8ED647,
  '600': #7AC82D,
  '700': #65A725,
  '800': #51851E,
  '900': #3D6119,
  '950': #263D10,
);
$brand-base: #ace178;
$brand-ink: #000000;

@function brand($step) { @return map-get($brand, $step); }
w3c design tokens (json)click to select
{
  "color": {
    "brand": {
      "50": { "$value": "#F7FBF4", "$type": "color" },
      "100": { "$value": "#F0F7E8", "$type": "color" },
      "200": { "$value": "#DEF0CB", "$type": "color" },
      "300": { "$value": "#C7EBA3", "$type": "color" },
      "400": { "$value": "#ace178", "$type": "color" },
      "500": { "$value": "#8ED647", "$type": "color" },
      "600": { "$value": "#7AC82D", "$type": "color" },
      "700": { "$value": "#65A725", "$type": "color" },
      "800": { "$value": "#51851E", "$type": "color" },
      "900": { "$value": "#3D6119", "$type": "color" },
      "950": { "$value": "#263D10", "$type": "color" }
    },
    "brandInk": { "$value": "#000000", "$type": "color" }
  }
}

Best text color

Only one of black and white can be right. This is the one, with the number that proves it.

Readable at a glance#000000 on #ace178 · 13.80:1
Use #000000AAA at every size.
Aa
12px
Aa
16px
Aa
24px
Aa
White text · 1.52:1
AA fail · AA large fail · AAA fail
Aa
Black text · 13.80:1 · recommended
AA pass · AA large pass · AAA pass
Reading the other direction: #ace178 as text scores 1.52:1 on white and 13.80:1 on black.
Best tinted ink on it, if plain black or white feels flat: #3F6817 at 4.31:1.

Make it accessible

A contrast checker tells you that you failed. This tells you what to ship instead — same hue, same saturation, lightness moved only as far as WCAG demands.

The quick fox
#50841D · 4.51:1
AA on white−36% L
#50841D
The quick fox
#3C6216 · 7.12:1
AAA on white−44% L
#3C6216
The quick fox
#ace178 · 13.80:1
AA on blackalready passes
#ace178
The quick fox
#ace178 · 13.80:1
AAA on blackalready passes
#ace178

Large text — 24px regular or 18.66px bold and above — only needs 3:1, so #64A525 is enough for headings on white. Non-text elements such as icons, chart strokes and focus rings also sit at 3:1 under WCAG 2.2 (1.4.11).

Accessibility — WCAG contrast

Aa
#ace178 on white: 1.52:1
AA ✗ fail · AA-large · AAA
Aa
#ace178 on black: 13.80:1
AA ✓ pass · AA-large · AAA
Against the neutral ladder

Contrast is symmetric, so each row covers both directions: #ace178 as text on that neutral, and that neutral as text on #ace178.

NeutralRatioBoth directions
White1.52:1AaAa
Slate 501.45:1AaAa
Slate 1001.39:1AaAa
Slate 2001.23:1AaAa
Slate 3001.03:1AaAa
Slate 4001.68:1AaAa
Slate 5003.13:1AaAa
Slate 6004.98:1AaAa
Slate 7006.80:1AaAa
Slate 8009.61:1AaAa
Slate 90011.73:1AaAa
Black13.80:1AaAa
Colour vision deficiency
true color
protanopia · #E9D46F
deuteranopia · #E2D07E
tritanopia · #AFD9C8

Roughly one man in twelve has some form of colour vision deficiency. If any of the three panels above is hard to tell apart from a neighbouring colour in your palette, add a shape, an icon or a label so the meaning does not rest on hue alone.

Color scale — 50 to 950

A Tailwind-shaped ramp built around this exact hex. #ace178 is pinned to step 400; the rest hold its hue and let saturation ease off at the extremes so the pale end never turns neon.

#F7FBF4
#F0F7E8
#DEF0CB
#C7EBA3
#ace178
#8ED647
#7AC82D
#65A725
#51851E
#3D6119
#263D10
Base = 400Lightest = 50 · #F7FBF4Darkest = 950 · #263D10Text step on white = 900
Perceptual ramp — OKLCH

The same eleven steps expressed in OKLCH, where equal lightness numbers actually look equally spaced. HSL ramps go muddy in the yellows and washed out in the blues; this one does not. Modern browsers render it natively — the hex ramp above is the fallback.

50100200300400500600700800900950
oklch tokensclick to select
:root {
  --brand-50: oklch(0.97 0.036 130.9);
  --brand-100: oklch(0.94 0.058 130.9);
  --brand-200: oklch(0.88 0.088 130.9);
  --brand-300: oklch(0.80 0.114 130.9);
  --brand-400: oklch(0.72 0.134 130.9);
  --brand-500: oklch(0.64 0.146 130.9);
  --brand-600: oklch(0.56 0.146 130.9);
  --brand-700: oklch(0.48 0.137 130.9);
  --brand-800: oklch(0.40 0.123 130.9);
  --brand-900: oklch(0.32 0.102 130.9);
  --brand-950: oklch(0.24 0.080 130.9);
}

Colors that work with #ace178

Not a palette — a role sheet. Each swatch answers one question you will hit while building the component.

Text on it#000000
Black wins here
Surface#F7FAF4
Tinted page background
Border#D6EDC0
Hairlines and dividers
Muted text#729B4B
Captions on the surface
Accent#9175E4
Second voice, not a rival
Dark variant#3F6817
Hover, pressed, headers
Light variant#F2FAEA
Selected rows, tints
Dark surface#1C2414
Dark-mode background
Hover#9ADA5B
One step down in lightness
Pressed#88D43D
Two steps down
Disabled#E4EADF
Chroma pulled out
Focus ring#B6EC81
Offset from the fill so it reads
Light mode
Everything in its place

Surface, border, heading and body all derive from this one hue, so the screen stays coherent without a second palette.

Primary actionSecondaryBadge
Dark mode
Same hue, inverted

Lightness flips, hue holds. The accent stays the anchor in both themes.

Primary actionSecondaryAccent

In real components

The same eight roles, wired into the interface patterns you will actually build with them. Every state below is a computed value, not a mock-up.

Buttons and states
Save changesHoverPressedDisabled
OutlineSubtleLinkFocused
Form field
you@company.com

Focus ring uses the light variant so the field still reads as one shape.

Send me product updates
Notice
Your export is ready

The file stays available for seven days. Download it before it expires.

NewBetaDraft
Data
Storage used68%
Acme LtdActive
NorthwindTrial
GlobexActive

How to use #ace178

Derived from its contrast, chroma and lightness — not from taste.

Works well for
  • Text and icons on dark surfaces
  • Primary buttons and calls to action
  • Focus rings, active and selected states
  • Card and section backgrounds
  • Brand accents, badges and data highlights
Use with care
  • Text of any size on white — fails WCAG AA
  • Full-page backgrounds — tiring over long sessions
  • White text placed on it
  • Status meaning — pair it with an icon or label, never colour alone
  • Pairing with a same-lightness hue — edges vibrate
Minimum size as text on white
Not as text
Safe as a fill behind white type
No — use #3F6817
Safe as a 1px border on white
No — use #64A525

Meaning and mood

What a colour in this family tends to signal, and how this particular chroma and lightness change the reading.

safegrowingnaturalpermissive

Green means go, well, and grown. It carries finance, sustainability and health with almost no explanation needed.

This is a confident chroma: strong enough to lead a brand, restrained enough to live in an interface all day. The lightness keeps it airy and approachable.

Worth knowing

Red/green pairs are the most common colour-blindness failure — never let the two carry meaning alone.

Reads as
  • FormalityMedium
  • EnergyMedium-high
  • Weight32/100
  • TemperatureNeutral
  • ApproachabilityBalanced

Colour associations are cultural and vary by market. Treat these as a starting point for a conversation with your audience, not a finding about them.

Similar colors

One move away from this hex in each direction. Every swatch is its own page.

Color relationships

The wheel positions with their names attached, so you can grab the one you actually need.

Complementary#AD78E1
Analogous left#E0E178
Analogous right#78E178
Split-complement 1#7878E1
Split-complement 2#E178E0
Triadic 1#78ACE1
Triadic 2#E178AC
Tetradic#78E0E1
On the wheel
Base+30°−30°+120°+240°+180°90°

#ace178 sits at 90°. Every dot is a harmony position and links to its own page in the table alongside.

RGB percentages

Red67.5%
Green88.2%
Blue47.1%
R · 0–255
172
0xac
G · 0–255
225
0xe1
B · 0–255
120
0x78

CMYK percentages

Cyan23.6%
Magenta0.0%
Yellow46.7%
Key (black)11.8%

Total ink coverage is 82%. Most commercial presses cap around 300% — above that, sheets stop drying properly.

Color previews

#ace178 text on a black background

contrast 13.80:1

Card sample

#ace178 text on a white background

contrast 1.52:1

Card sample

#ace178 on grey

1.39:1

#ace178 on its own surface

1.45:1

#ace178 on its dark surface

10.52:1

CSS3 live lab

Text font color

The quick brown fox

color: #ace178;
Background color
Panel with #ace178 background
background-color: #ace178;
Text shadow — hex

Glowing headline

text-shadow: 2px 2px 8px #ace178;
Text shadow — RGB

Soft neon halo

text-shadow: 0 0 14px rgba(172, 225, 120, 0.45);
Div box shadow
Elevated card
box-shadow: 0 12px 32px -8px rgba(172, 225, 120, 0.45);
Border & gradient
Gradient panel
border: 3px solid #ace178;
background: linear-gradient(135deg, #ace178, #78E18A);
Gradient text

Gradient headline

background: linear-gradient(90deg, #ace178, #78E1A4);
-webkit-background-clip: text;
color: transparent;
Focus ring
Focused control
outline: 2px solid #ace178;
outline-offset: 3px;
Underline & caret

Marked up text

text-decoration-color: #ace178;
caret-color: #ace178;
Left rule
Pull quote or callout
border-left: 4px solid #ace178;
Ring + tint
Selected chip
background: #F2FAEA;
box-shadow: inset 0 0 0 2px #ace178;
Conic badge
68%
background: conic-gradient(#ace178 68%, #e2e8f0 0);

Transparency

What each alpha value actually composites to. The top row is #ace178 over white; the bottom row is the same alpha over a checkerboard, so you can see what survives on a photo or a video.

Bottom row of hexes is the flattened result over white — use those when a design tool refuses transparency, or when you need a solid fallback.

alpha in every syntaxclick to select
rgba(172, 225, 120, 0.5)
rgb(172 225 120 / 50%)
#ace17880
hsl(90 64% 68% / 50%)
color-mix(in srgb, #ace178 50%, transparent)
Alpha8-digit hexFlat on white
10%#ace1781a#F7FCF2
20%#ace17833#EEF9E4
40%#ace17866#DEF3C9
60%#ace17899#CDEDAE
80%#ace178cc#BDE793

Gradients from #ace178

Six recipes, each built from this hex and shown with the exact CSS that produced it.

Elevation
Same hue, three lightnesses — safe anywhere
background: linear-gradient(135deg, #CBECAA, #ace178 45%, #3F6817);
Duotone
A short hue run reads richer than a flat fill
background: linear-gradient(120deg, #ace178, #5FDB7F);
Complement sweep
Loud — keep it behind large type only
background: linear-gradient(90deg, #ace178, #AD78E1);
Spotlight
Hero panels and app headers
background: radial-gradient(120% 120% at 20% 0%, #DAF2C3 0%, #ace178 45%, #3F6817 100%);
Soft wash
Section backgrounds that stay readable
background: linear-gradient(180deg, #F7FAF4, #ffffff);
Mesh
Ambient background, no image weight
background: radial-gradient(60% 60% at 15% 20%, #EAE5A2 0%, transparent 60%), radial-gradient(55% 55% at 85% 15%, #91E698 0%, transparent 60%), radial-gradient(70% 70% at 50% 95%, #3F6817 0%, transparent 65%), #ace178;

Monochromatic scale

Palettes built from #ace178

Shades — darker

Tints — lighter

Tones — desaturated

Color harmonies

Nearest named colors

Ranked with CIEDE2000 across all 139 CSS keywords. Under ΔE 2 the eye stops telling them apart; over ΔE 10 they are plainly different colors.

#ace178 in the real world

Where a color in this family tends to land, and the interface roles it is usually asked to play.

Industries
SustainabilityFinanceHealth and wellnessAgriculture
Common UI roles
SurfacesBadgesHighlightsEmpty states
Print note

Converts to four-color process without much drama. Proof it anyway.

On screens

Holds up across typical panel gamma. Still worth checking on an uncalibrated laptop, where mid-tones shift most.

In dark mode

Usable as-is on a dark surface at 13.80:1.

Explore nearby colors

Small, deliberate steps away from this hex — useful when you are hunting for the version of a colour that finally feels right.

#ace178, answered

What color is #ace178?

#ace178 is a light vivid green, closest to Light Green (ΔE2000 7). It sits at 90° on the hue wheel with 64% saturation and 68% lightness, which reads as neutral.

What is the RGB value of #ace178?

rgb(172, 225, 120) — 172 red, 225 green and 120 blue out of 255, or 67.5% / 88.2% / 47.1% by channel.

What is #ace178 in HSL and HSV?

hsl(90, 64%, 68%) and hsv(90, 47%, 88%). HSL is what CSS takes; HSV is what your design tool's picker shows, which is why the saturation numbers rarely match.

Is #ace178 a light or a dark color?

It is a light color. Relative luminance is 0.6398 and perceived brightness is 79%, so black text on it reaches 13.80:1.

Should I use black or white text on #ace178?

Black. It scores 13.80:1 against #ace178, versus 1.52:1 for white — AAA at any size.

Is #ace178 accessible on a white background?

#ace178 on white scores 1.52:1, which fails WCAG AA at every size. Darken it to #50841D to reach 4.5:1, or #3C6216 for 7:1.

What is the complementary color of #ace178?

#AD78E1 sits directly opposite on the wheel. Softer options are the split-complements #7878E1 and #E178E0, which give the same contrast with far less vibration.

What colors go well with #ace178?

For interface work: #F7FAF4 as the surface, #D6EDC0 for borders, #729B4B for secondary text, #9175E4 as an accent and #3F6817 for hover and pressed states. For a palette, the analogous pair #E0E178 and #78E178 stays calm, while #AD78E1 is the loudest partner.

What is #ace178 in CMYK for printing?

cmyk(24%, 0%, 47%, 12%). This is a screen-to-ink approximation — ask your printer for a proof before committing to a run.

Is #ace178 warm or cool?

Neutral — it scores 50 on a scale where 0 is the warmest orange and 100 the coolest azure. Nudged warmer it becomes #D2E178; nudged cooler, #84E376.

Which Tailwind color is closest to #ace178?

The lime family — its 500 step is #84cc16, ΔE2000 9.4 away. That is a visible difference, so define #ace178 as a custom token rather than reaching for the built-in.

How do I use #ace178 in Tailwind CSS?

Inline it as an arbitrary value with bg-[#ace178] or text-[#ace178], or register the whole ramp under theme.extend.colors.brand so you get bg-brand-500 and friends. The generated 50–950 scale on this page is ready to paste into your config.

What is #ace178 with 50% opacity?

rgba(172, 225, 120, 0.5), or #ace17880 in eight-digit hex. Over white that composites to #D6F0BC; over black, #56713C.

Is #ace178 a web-safe color?

No. The nearest web-safe colour is #99CC66, ΔE2000 5.1 away. The palette only matters for legacy displays and some email clients now.

What does the color #ace178 mean?

As a green, it reads safe, growing, natural. Green means go, well, and grown. It carries finance, sustainability and health with almost no explanation needed. At this chroma the effect is amplified — it will dominate whatever sits beside it.

What gradient works with #ace178?

The safest is same-hue elevation: linear-gradient(135deg, #CBECAA, #ace178 45%, #3F6817). For more colour, a short hue run to #5FDB7F keeps it rich without turning muddy.

Work with #ace178 in the Color Lab

Every tool opens with this colour already loaded.

Every value on this page is computed from #ace178 at request time — conversions, contrast ratios and ΔE distances are calculated, never looked up.