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violet · cool

#a33ffb

a balanced, electric violet · cool · closest name: Blue Violet

Token name suggestion: Atlas Plum

RGB
163, 63, 251
HSL
272°, 96%, 62%
CMYK
35, 75, 0, 2
Luminance
0.1831

#a33ffb is a balanced electric violet, 272° on the wheel and 66/100 on the cool side. Put black text on it (4.66:1). As text it scores 4.51:1 on white — safe at any size. Nearest name is Blue Violet, nearest Tailwind family is purple.

hsl(272 96% 62%)rgb(163 63 251)Base step 400AA inkCool

At a glance

Every number on this page in one read: what #a33ffb is made of, how bright it looks, and which way it leans.

Hex
#a33ffb
Hue
272°
violet
Saturation
96%
electric
Lightness
62%
balanced
Brightness
98%
HSV value
Perceived
52%
weighted brightness
Luminance
0.1831
WCAG relative
Temperature
Cool
66/100 cool
Color family
Violet
Tone
Electric
Best ink
Black
4.66:1
Closest name
Blue Violet
ΔE2000 7.4
Chroma
104.8
LCH, 0–130ish
OKLCH L
0.600
perceptual lightness
Tailwind
purple
500 · ΔE 4.3
Web-safe
#9933FF
nearest of 216
Where it sits
Hue272° of 360°
Saturation96%
Lightness62%
Saturation × lightness field

Left edge is grey, right edge is full chroma; top is white, bottom is black. The dot is #a33ffb.

Temperature
Warm ← → Cool66% cool

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

Luminance by channel
Red43%
Green19%
Blue38%

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

Every format

HEX#a33ffb
HEX (8-digit)#a33ffbff
RGBrgb(163, 63, 251)
RGBArgba(163, 63, 251, 1)
HSLhsl(272, 96%, 62%)
HSV / HSBhsv(272, 75%, 98%)
HWBhwb(272 25% 2%)
CMYKcmyk(35%, 75%, 0%, 2%)
LABlab(49.9 72.0 -76.2)
LCHlch(49.9 104.8 313.4)
OKLCHoklch(0.600 0.260 303.4)
XYZ (D65)xyz(34.29, 18.31, 92.98)
Decimal10698747
Display P3color(display-p3 0.639 0.247 0.984)
Web-safe#9933FF

Copy-ready code

every platformclick to select
/* CSS */
color: #a33ffb;
background-color: #a33ffb;
/* CSS custom property */
--brand: #a33ffb;
/* Tailwind (arbitrary) */
class="text-[#a33ffb] bg-[#a33ffb]"
/* SCSS */
$brand: #a33ffb;
/* SwiftUI */
Color(red: 0.639, green: 0.247, blue: 0.984)
/* UIKit */
UIColor(red: 0.639, green: 0.247, blue: 0.984, alpha: 1)
/* Android XML */
<color name="brand">#A33FFB</color>
/* Android Compose */
Color(0xFFA33FFB)
/* Flutter */
Color(0xFFA33FFB)
/* Python / OpenCV (BGR) */
(251, 63, 163)
/* Python / PIL (RGB) */
(163, 63, 251)
/* Java AWT */
new Color(163, 63, 251)
/* .NET */
Color.FromArgb(255, 163, 63, 251)
/* OpenGL / Unity (0–1) */
(0.6392f, 0.2471f, 0.9843f, 1f)
/* LaTeX */
\definecolor{brand}{RGB}{163,63,251}
modern cssclick to select
/* mix without leaving CSS */
background: color-mix(in oklab, #a33ffb 85%, white);
border-color: color-mix(in oklab, #a33ffb 40%, transparent);
/* theme-aware in one line */
color: light-dark(#44037D, #E1D3EE);
/* relative colour syntax */
--hover: hsl(from #a33ffb 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: #F8F1FD;
  --brand-100: #F0E4FC;
  --brand-200: #E0C1FA;
  --brand-300: #CA91FD;
  --brand-400: #a33ffb;
  --brand-500: #9623FA;
  --brand-600: #8205F0;
  --brand-700: #6C04C8;
  --brand-800: #5703A0;
  --brand-900: #410773;
  --brand-950: #280548;
  --brand: #a33ffb;
  --brand-ink: #000000;
  --brand-surface: #F8F4FA;
  --brand-border: #D8C0ED;
  --brand-hover: #921CFA;
  --brand-pressed: #8105EE;
}
@media (prefers-color-scheme: dark) {
  :root {
    --brand-surface: #1D1424;
    --brand-ink: #E1D3EE;
  }
}
tailwind.config.jsclick to select
theme: {
  extend: {
    colors: {
      brand: {
        50: '#F8F1FD',
        100: '#F0E4FC',
        200: '#E0C1FA',
        300: '#CA91FD',
        400: '#a33ffb',
        500: '#9623FA',
        600: '#8205F0',
        700: '#6C04C8',
        800: '#5703A0',
        900: '#410773',
        950: '#280548',
        DEFAULT: '#a33ffb',
      },
    },
  },
}
scss mapclick to select
$brand: (
  '50': #F8F1FD,
  '100': #F0E4FC,
  '200': #E0C1FA,
  '300': #CA91FD,
  '400': #a33ffb,
  '500': #9623FA,
  '600': #8205F0,
  '700': #6C04C8,
  '800': #5703A0,
  '900': #410773,
  '950': #280548,
);
$brand-base: #a33ffb;
$brand-ink: #000000;

@function brand($step) { @return map-get($brand, $step); }
w3c design tokens (json)click to select
{
  "color": {
    "brand": {
      "50": { "$value": "#F8F1FD", "$type": "color" },
      "100": { "$value": "#F0E4FC", "$type": "color" },
      "200": { "$value": "#E0C1FA", "$type": "color" },
      "300": { "$value": "#CA91FD", "$type": "color" },
      "400": { "$value": "#a33ffb", "$type": "color" },
      "500": { "$value": "#9623FA", "$type": "color" },
      "600": { "$value": "#8205F0", "$type": "color" },
      "700": { "$value": "#6C04C8", "$type": "color" },
      "800": { "$value": "#5703A0", "$type": "color" },
      "900": { "$value": "#410773", "$type": "color" },
      "950": { "$value": "#280548", "$type": "color" }
    },
    "brandInk": { "$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 #a33ffb · 4.66:1
Use #000000AA at every size, AAA for large text only.
Aa
12px
Aa
16px
Aa
24px
Aa
White text · 4.51:1
AA pass · AA large pass · AAA fail
Aa
Black text · 4.66:1 · recommended
AA pass · AA large pass · AAA fail
Reading the other direction: #a33ffb as text scores 4.51:1 on white and 4.66:1 on black.
Best tinted ink on it, if plain black or white feels flat: #44037D at 3.00:1.

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
#a33ffb · 4.51:1
AA on whitealready passes
#a33ffb
The quick fox
#7B05E4 · 7.04:1
AAA on white−16% L
#7B05E4
The quick fox
#a33ffb · 4.66:1
AA on blackalready passes
#a33ffb
The quick fox
#BD76FC · 7.16:1
AAA on black+11% L
#BD76FC

Large text — 24px regular or 18.66px bold and above — only needs 3:1, so #A33FFB 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
#a33ffb on white: 4.51:1
AA ✓ pass · AA-large · AAA
Aa
#a33ffb on black: 4.66:1
AA ✓ pass · AA-large · AAA
Against the neutral ladder

Contrast is symmetric, so each row covers both directions: #a33ffb as text on that neutral, and that neutral as text on #a33ffb.

NeutralRatioBoth directions
White4.51:1AaAa
Slate 504.31:1AaAa
Slate 1004.11:1AaAa
Slate 2003.65:1AaAa
Slate 3003.03:1AaAa
Slate 4001.76:1AaAa
Slate 5001.06:1AaAa
Slate 6001.68:1AaAa
Slate 7002.30:1AaAa
Slate 8003.25:1AaAa
Slate 9003.96:1AaAa
Black4.66:1AaAa
Colour vision deficiency
true color
protanopia · #0075FF
deuteranopia · #0076F7
tritanopia · #916F9B

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. #a33ffb 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.

#F8F1FD
#F0E4FC
#E0C1FA
#CA91FD
#a33ffb
#9623FA
#8205F0
#6C04C8
#5703A0
#410773
#280548
Base = 400Lightest = 50 · #F8F1FDDarkest = 950 · #280548Text step on white = 400
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 0.065 303.4);
  --brand-100: oklch(0.94 0.104 303.4);
  --brand-200: oklch(0.88 0.156 303.4);
  --brand-300: oklch(0.80 0.203 303.4);
  --brand-400: oklch(0.72 0.239 303.4);
  --brand-500: oklch(0.64 0.260 303.4);
  --brand-600: oklch(0.56 0.260 303.4);
  --brand-700: oklch(0.48 0.244 303.4);
  --brand-800: oklch(0.40 0.218 303.4);
  --brand-900: oklch(0.32 0.182 303.4);
  --brand-950: oklch(0.24 0.143 303.4);
}

Colors that work with #a33ffb

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#F8F4FA
Tinted page background
Border#D8C0ED
Hairlines and dividers
Muted text#754B9B
Captions on the surface
Accent#93CC00
Second voice, not a rival
Dark variant#44037D
Hover, pressed, headers
Light variant#F3E6FE
Selected rows, tints
Dark surface#1D1424
Dark-mode background
Hover#921CFA
One step down in lightness
Pressed#8105EE
Two steps down
Disabled#D6CCDE
Chroma pulled out
Focus ring#AD50FF
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 #a33ffb

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

Works well for
  • Body text and links on white
  • Text and icons on dark surfaces
  • Primary buttons and calls to action
  • Focus rings, active and selected states
  • Brand accents, badges and data highlights
  • Chart series and data categories
Use with care
  • Full-page backgrounds — tiring over long sessions
  • Pairing with a same-lightness hue — edges vibrate
Minimum size as text on white
Any size
Safe as a fill behind white type
Yes
Safe as a 1px border on white
Yes

Meaning and mood

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

creativepremiummodernimaginative

Violet sits between the warmth of red and the calm of blue, so it reads as inventive without reading as risky. Current shorthand for software craft.

At this chroma the association is amplified — it will dominate anything placed beside it, so give it space and use it sparingly. The mid lightness keeps it versatile in both themes.

Worth knowing

Deep violets swallow detail on screens with poor gamma; check it on a cheap laptop panel.

Reads as
  • FormalityLow
  • EnergyHigh
  • Weight38/100
  • TemperatureCool
  • ApproachabilityReserved

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#97FB3F
Analogous left#453FFB
Analogous right#FB3FF5
Split-complement 1#F5FB3F
Split-complement 2#3FFB45
Triadic 1#FBA33F
Triadic 2#3FFBA3
Tetradic#FB453F
On the wheel
Base+30°−30°+120°+240°+180°272°

#a33ffb sits at 272°. Every dot is a harmony position and links to its own page in the table alongside.

RGB percentages

Red63.9%
Green24.7%
Blue98.4%
R · 0–255
163
0xa3
G · 0–255
63
0x3f
B · 0–255
251
0xfb

CMYK percentages

Cyan35.1%
Magenta74.9%
Yellow0.0%
Key (black)1.6%

Total ink coverage is 112%. Most commercial presses cap around 300% — above that, sheets stop drying properly.

Color previews

#a33ffb text on a black background

contrast 4.66:1

Card sample

#a33ffb text on a white background

contrast 4.51:1

Card sample

#a33ffb on grey

4.11:1

#a33ffb on its own surface

4.14:1

#a33ffb on its dark surface

3.96:1

CSS3 live lab

Text font color

The quick brown fox

color: #a33ffb;
Background color
Panel with #a33ffb background
background-color: #a33ffb;
Text shadow — hex

Glowing headline

text-shadow: 2px 2px 8px #a33ffb;
Text shadow — RGB

Soft neon halo

text-shadow: 0 0 14px rgba(163, 63, 251, 0.45);
Div box shadow
Elevated card
box-shadow: 0 12px 32px -8px rgba(163, 63, 251, 0.45);
Border & gradient
Gradient panel
border: 3px solid #a33ffb;
background: linear-gradient(135deg, #a33ffb, #FB3FD6);
Gradient text

Gradient headline

background: linear-gradient(90deg, #a33ffb, #FB3FA7);
-webkit-background-clip: text;
color: transparent;
Focus ring
Focused control
outline: 2px solid #a33ffb;
outline-offset: 3px;
Underline & caret

Marked up text

text-decoration-color: #a33ffb;
caret-color: #a33ffb;
Left rule
Pull quote or callout
border-left: 4px solid #a33ffb;
Ring + tint
Selected chip
background: #F3E6FE;
box-shadow: inset 0 0 0 2px #a33ffb;
Conic badge
68%
background: conic-gradient(#a33ffb 68%, #e2e8f0 0);

Transparency

What each alpha value actually composites to. The top row is #a33ffb 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(163, 63, 251, 0.5)
rgb(163 63 251 / 50%)
#a33ffb80
hsl(272 96% 62% / 50%)
color-mix(in srgb, #a33ffb 50%, transparent)
Alpha8-digit hexFlat on white
10%#a33ffb1a#F6ECFF
20%#a33ffb33#EDD9FE
40%#a33ffb66#DAB2FD
60%#a33ffb99#C88CFD
80%#a33ffbcc#B565FC

Gradients from #a33ffb

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, #C07BFC, #a33ffb 45%, #44037D);
Duotone
A short hue run reads richer than a flat fill
background: linear-gradient(120deg, #a33ffb, #FA21BD);
Complement sweep
Loud — keep it behind large type only
background: linear-gradient(90deg, #a33ffb, #97FB3F);
Spotlight
Hero panels and app headers
background: radial-gradient(120% 120% at 20% 0%, #CE99FD 0%, #a33ffb 45%, #44037D 100%);
Soft wash
Section backgrounds that stay readable
background: linear-gradient(180deg, #F8F4FA, #ffffff);
Mesh
Ambient background, no image weight
background: radial-gradient(60% 60% at 15% 20%, #7178FC 0%, transparent 60%), radial-gradient(55% 55% at 85% 15%, #FC5DE9 0%, transparent 60%), radial-gradient(70% 70% at 50% 95%, #44037D 0%, transparent 65%), #a33ffb;

Monochromatic scale

Palettes built from #a33ffb

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.

#a33ffb in the real world

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

Industries
Creative toolsFintechBeautyLuxury
Common UI roles
ButtonsLinksFocus statesCharts
Print note

Sits outside most CMYK gamuts — expect a duller press result, or specify a spot ink.

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 4.66:1.

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.

#a33ffb, answered

What color is #a33ffb?

#a33ffb is a balanced electric violet, closest to Blue Violet (ΔE2000 7.4). It sits at 272° on the hue wheel with 96% saturation and 62% lightness, which reads as cool.

What is the RGB value of #a33ffb?

rgb(163, 63, 251) — 163 red, 63 green and 251 blue out of 255, or 63.9% / 24.7% / 98.4% by channel.

What is #a33ffb in HSL and HSV?

hsl(272, 96%, 62%) and hsv(272, 75%, 98%). HSL is what CSS takes; HSV is what your design tool's picker shows, which is why the saturation numbers rarely match.

Is #a33ffb a light or a dark color?

It is a mid-tone. Relative luminance is 0.1831 and perceived brightness is 52%, so black text on it reaches 4.66:1.

Should I use black or white text on #a33ffb?

Black. It scores 4.66:1 against #a33ffb, versus 4.51:1 for white — AA at any size.

Is #a33ffb accessible on a white background?

#a33ffb on white scores 4.51:1, which clears AA at every size but not AAA.

What is the complementary color of #a33ffb?

#97FB3F sits directly opposite on the wheel. Softer options are the split-complements #F5FB3F and #3FFB45, which give the same contrast with far less vibration.

What colors go well with #a33ffb?

For interface work: #F8F4FA as the surface, #D8C0ED for borders, #754B9B for secondary text, #93CC00 as an accent and #44037D for hover and pressed states. For a palette, the analogous pair #453FFB and #FB3FF5 stays calm, while #97FB3F is the loudest partner.

What is #a33ffb in CMYK for printing?

cmyk(35%, 75%, 0%, 2%). This is a screen-to-ink approximation — a color this saturated sits outside most CMYK gamuts and will print duller than it looks here.

Is #a33ffb warm or cool?

Cool — it scores 66 on a scale where 0 is the warmest orange and 100 the coolest azure. Nudged warmer it becomes #E83FFB; nudged cooler, #5D3DFD.

Which Tailwind color is closest to #a33ffb?

The purple family — its 500 step is #a855f7, ΔE2000 4.3 away. That is a visible difference, so define #a33ffb as a custom token rather than reaching for the built-in.

How do I use #a33ffb in Tailwind CSS?

Inline it as an arbitrary value with bg-[#a33ffb] or text-[#a33ffb], 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 #a33ffb with 50% opacity?

rgba(163, 63, 251, 0.5), or #a33ffb80 in eight-digit hex. Over white that composites to #D19FFD; over black, #52207E.

Is #a33ffb a web-safe color?

No. The nearest web-safe colour is #9933FF, ΔE2000 2.8 away. The palette only matters for legacy displays and some email clients now.

What does the color #a33ffb mean?

As a violet, it reads creative, premium, modern. Violet sits between the warmth of red and the calm of blue, so it reads as inventive without reading as risky. Current shorthand for software craft. At this chroma the effect is amplified — it will dominate whatever sits beside it.

What gradient works with #a33ffb?

The safest is same-hue elevation: linear-gradient(135deg, #C07BFC, #a33ffb 45%, #44037D). For more colour, a short hue run to #FA21BD keeps it rich without turning muddy.

Work with #a33ffb in the Color Lab

Every tool opens with this colour already loaded.

Every value on this page is computed from #a33ffb at request time — conversions, contrast ratios and ΔE distances are calculated, never looked up.