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cyan · cool

#49fdff

a balanced, electric cyan · cool · closest name: Cyan

Token name suggestion: Atlas Glacier

RGB
73, 253, 255
HSL
181°, 100%, 64%
CMYK
71, 1, 0, 0
Luminance
0.7889

#49fdff is a balanced electric cyan, 181° on the wheel and 88/100 on the cool side. Put black text on it (16.78:1). As text it scores 1.25:1 on white — use #008081 instead. Nearest name is Cyan, nearest Tailwind family is teal.

hsl(181 100% 64%)rgb(73 253 255)Base step 400AAA inkCool

At a glance

Every number on this page in one read: what #49fdff is made of, how bright it looks, and which way it leans.

Hex
#49fdff
Hue
181°
cyan
Saturation
100%
electric
Lightness
64%
balanced
Brightness
100%
HSV value
Perceived
85%
weighted brightness
Luminance
0.7889
WCAG relative
Temperature
Cool
88/100 cool
Color family
Cyan
Tone
Electric
Best ink
Black
16.78:1
Closest name
Cyan
ΔE2000 1.7
Chroma
45.2
LCH, 0–130ish
OKLCH L
0.908
perceptual lightness
Tailwind
teal
500 · ΔE 18.1
Web-safe
#33FFFF
nearest of 216
Where it sits
Hue181° of 360°
Saturation100%
Lightness64%
Saturation × lightness field

Left edge is grey, right edge is full chroma; top is white, bottom is black. The dot is #49fdff.

Temperature
Warm ← → Cool88% 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
Red2%
Green89%
Blue9%

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

Every format

HEX#49fdff
HEX (8-digit)#49fdffff
RGBrgb(73, 253, 255)
RGBArgba(73, 253, 255, 1)
HSLhsl(181, 100%, 64%)
HSV / HSBhsv(181, 71%, 100%)
HWBhwb(181 29% 0%)
CMYKcmyk(71%, 1%, 0%, 0%)
LABlab(91.2 -43.0 -14.0)
LCHlch(91.2 45.2 198.0)
OKLCHoklch(0.908 0.140 196.1)
XYZ (D65)xyz(55.91, 78.88, 106.87)
Decimal4849151
Display P3color(display-p3 0.286 0.992 1.000)
Web-safe#33FFFF

Copy-ready code

every platformclick to select
/* CSS */
color: #49fdff;
background-color: #49fdff;
/* CSS custom property */
--brand: #49fdff;
/* Tailwind (arbitrary) */
class="text-[#49fdff] bg-[#49fdff]"
/* SCSS */
$brand: #49fdff;
/* SwiftUI */
Color(red: 0.286, green: 0.992, blue: 1.000)
/* UIKit */
UIColor(red: 0.286, green: 0.992, blue: 1.000, alpha: 1)
/* Android XML */
<color name="brand">#49FDFF</color>
/* Android Compose */
Color(0xFF49FDFF)
/* Flutter */
Color(0xFF49FDFF)
/* Python / OpenCV (BGR) */
(255, 253, 73)
/* Python / PIL (RGB) */
(73, 253, 255)
/* Java AWT */
new Color(73, 253, 255)
/* .NET */
Color.FromArgb(255, 73, 253, 255)
/* OpenGL / Unity (0–1) */
(0.2863f, 0.9922f, 1.0000f, 1f)
/* LaTeX */
\definecolor{brand}{RGB}{73,253,255}
modern cssclick to select
/* mix without leaving CSS */
background: color-mix(in oklab, #49fdff 85%, white);
border-color: color-mix(in oklab, #49fdff 40%, transparent);
/* theme-aware in one line */
color: light-dark(#007E80, #D3EEEE);
/* relative colour syntax */
--hover: hsl(from #49fdff 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: #F1FDFE;
  --brand-100: #E3FCFC;
  --brand-200: #C0FBFC;
  --brand-300: #8FFEFF;
  --brand-400: #49fdff;
  --brand-500: #1FFCFF;
  --brand-600: #00F2F5;
  --brand-700: #00CACC;
  --brand-800: #00A1A3;
  --brand-900: #057476;
  --brand-950: #034949;
  --brand: #49fdff;
  --brand-ink: #000000;
  --brand-surface: #F4FAFA;
  --brand-border: #C0ECED;
  --brand-hover: #25FCFF;
  --brand-pressed: #02FCFF;
}
@media (prefers-color-scheme: dark) {
  :root {
    --brand-surface: #142424;
    --brand-ink: #D3EEEE;
  }
}
tailwind.config.jsclick to select
theme: {
  extend: {
    colors: {
      brand: {
        50: '#F1FDFE',
        100: '#E3FCFC',
        200: '#C0FBFC',
        300: '#8FFEFF',
        400: '#49fdff',
        500: '#1FFCFF',
        600: '#00F2F5',
        700: '#00CACC',
        800: '#00A1A3',
        900: '#057476',
        950: '#034949',
        DEFAULT: '#49fdff',
      },
    },
  },
}
scss mapclick to select
$brand: (
  '50': #F1FDFE,
  '100': #E3FCFC,
  '200': #C0FBFC,
  '300': #8FFEFF,
  '400': #49fdff,
  '500': #1FFCFF,
  '600': #00F2F5,
  '700': #00CACC,
  '800': #00A1A3,
  '900': #057476,
  '950': #034949,
);
$brand-base: #49fdff;
$brand-ink: #000000;

@function brand($step) { @return map-get($brand, $step); }
w3c design tokens (json)click to select
{
  "color": {
    "brand": {
      "50": { "$value": "#F1FDFE", "$type": "color" },
      "100": { "$value": "#E3FCFC", "$type": "color" },
      "200": { "$value": "#C0FBFC", "$type": "color" },
      "300": { "$value": "#8FFEFF", "$type": "color" },
      "400": { "$value": "#49fdff", "$type": "color" },
      "500": { "$value": "#1FFCFF", "$type": "color" },
      "600": { "$value": "#00F2F5", "$type": "color" },
      "700": { "$value": "#00CACC", "$type": "color" },
      "800": { "$value": "#00A1A3", "$type": "color" },
      "900": { "$value": "#057476", "$type": "color" },
      "950": { "$value": "#034949", "$type": "color" }
    },
    "brandInk": { "$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 #49fdff · 16.78:1
Use #000000AAA at every size.
Aa
12px
Aa
16px
Aa
24px
Aa
White text · 1.25:1
AA fail · AA large fail · AAA fail
Aa
Black text · 16.78:1 · recommended
AA pass · AA large pass · AAA pass
Reading the other direction: #49fdff as text scores 1.25:1 on white and 16.78:1 on black.
Best tinted ink on it, if plain black or white feels flat: #007E80 at 3.91:1.

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
#008081 · 4.77:1
AA on white−39% L
#008081
The quick fox
#006162 · 7.28:1
AAA on white−45% L
#006162
The quick fox
#49fdff · 16.78:1
AA on blackalready passes
#49fdff
The quick fox
#49fdff · 16.78:1
AAA on blackalready passes
#49fdff

Large text — 24px regular or 18.66px bold and above — only needs 3:1, so #00A3A5 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
#49fdff on white: 1.25:1
AA ✗ fail · AA-large · AAA
Aa
#49fdff on black: 16.78:1
AA ✓ pass · AA-large · AAA
Against the neutral ladder

Contrast is symmetric, so each row covers both directions: #49fdff as text on that neutral, and that neutral as text on #49fdff.

NeutralRatioBoth directions
White1.25:1AaAa
Slate 501.20:1AaAa
Slate 1001.14:1AaAa
Slate 2001.02:1AaAa
Slate 3001.19:1AaAa
Slate 4002.05:1AaAa
Slate 5003.80:1AaAa
Slate 6006.05:1AaAa
Slate 7008.27:1AaAa
Slate 80011.69:1AaAa
Slate 90014.26:1AaAa
Black16.78:1AaAa
Colour vision deficiency
true color
protanopia · #ECF1FF
deuteranopia · #D2DDFF
tritanopia · #00FFFD

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. #49fdff 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.

#F1FDFE
#E3FCFC
#C0FBFC
#8FFEFF
#49fdff
#1FFCFF
#00F2F5
#00CACC
#00A1A3
#057476
#034949
Base = 400Lightest = 50 · #F1FDFEDarkest = 950 · #034949Text 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 0.035 196.1);
  --brand-100: oklch(0.94 0.056 196.1);
  --brand-200: oklch(0.88 0.084 196.1);
  --brand-300: oklch(0.80 0.109 196.1);
  --brand-400: oklch(0.72 0.129 196.1);
  --brand-500: oklch(0.64 0.140 196.1);
  --brand-600: oklch(0.56 0.140 196.1);
  --brand-700: oklch(0.48 0.132 196.1);
  --brand-800: oklch(0.40 0.118 196.1);
  --brand-900: oklch(0.32 0.098 196.1);
  --brand-950: oklch(0.24 0.077 196.1);
}

Colors that work with #49fdff

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#F4FAFA
Tinted page background
Border#C0ECED
Hairlines and dividers
Muted text#4B9A9B
Captions on the surface
Accent#FF4974
Second voice, not a rival
Dark variant#007E80
Hover, pressed, headers
Light variant#E5FFFF
Selected rows, tints
Dark surface#142424
Dark-mode background
Hover#25FCFF
One step down in lightness
Pressed#02FCFF
Two steps down
Disabled#D4E4E4
Chroma pulled out
Focus ring#5DFDFF
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 #49fdff

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
  • Brand accents, badges and data highlights
  • Chart series and data categories
Use with care
  • Text of any size on white — fails WCAG AA
  • Full-page backgrounds — tiring over long sessions
  • Thin strokes and 1px borders — they disappear on light UI
  • 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 #007E80
Safe as a 1px border on white
No — use #00A3A5

Meaning and mood

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

cleantechnicalfreshclinical

Cyan reads as water, air and infrastructure: cool, hygienic, engineered.

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

At high lightness it disappears into white surfaces and thin strokes vanish entirely.

Reads as
  • FormalityLow
  • EnergyHigh
  • Weight36/100
  • 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#FF4B49
Analogous left#49FFA6
Analogous right#49A2FF
Split-complement 1#FF49A2
Split-complement 2#FFA649
Triadic 1#FF49FD
Triadic 2#FDFF49
Tetradic#A649FF
On the wheel
Base+30°−30°+120°+240°+180°181°

#49fdff sits at 181°. Every dot is a harmony position and links to its own page in the table alongside.

RGB percentages

Red28.6%
Green99.2%
Blue100.0%
R · 0–255
73
0x49
G · 0–255
253
0xfd
B · 0–255
255
0xff

CMYK percentages

Cyan71.4%
Magenta0.8%
Yellow0.0%
Key (black)0.0%

Total ink coverage is 72%. Most commercial presses cap around 300% — above that, sheets stop drying properly.

Color previews

#49fdff text on a black background

contrast 16.78:1

Card sample

#49fdff text on a white background

contrast 1.25:1

Card sample

#49fdff on grey

1.14:1

#49fdff on its own surface

1.19:1

#49fdff on its dark surface

12.83:1

CSS3 live lab

Text font color

The quick brown fox

color: #49fdff;
Background color
Panel with #49fdff background
background-color: #49fdff;
Text shadow — hex

Glowing headline

text-shadow: 2px 2px 8px #49fdff;
Text shadow — RGB

Soft neon halo

text-shadow: 0 0 14px rgba(73, 253, 255, 0.45);
Div box shadow
Elevated card
box-shadow: 0 12px 32px -8px rgba(73, 253, 255, 0.45);
Border & gradient
Gradient panel
border: 3px solid #49fdff;
background: linear-gradient(135deg, #49fdff, #4983FF);
Gradient text

Gradient headline

background: linear-gradient(90deg, #49fdff, #4956FF);
-webkit-background-clip: text;
color: transparent;
Focus ring
Focused control
outline: 2px solid #49fdff;
outline-offset: 3px;
Underline & caret

Marked up text

text-decoration-color: #49fdff;
caret-color: #49fdff;
Left rule
Pull quote or callout
border-left: 4px solid #49fdff;
Ring + tint
Selected chip
background: #E5FFFF;
box-shadow: inset 0 0 0 2px #49fdff;
Conic badge
68%
background: conic-gradient(#49fdff 68%, #e2e8f0 0);

Transparency

What each alpha value actually composites to. The top row is #49fdff 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(73, 253, 255, 0.5)
rgb(73 253 255 / 50%)
#49fdff80
hsl(181 100% 64% / 50%)
color-mix(in srgb, #49fdff 50%, transparent)
Alpha8-digit hexFlat on white
10%#49fdff1a#EDFFFF
20%#49fdff33#DBFFFF
40%#49fdff66#B6FEFF
60%#49fdff99#92FEFF
80%#49fdffcc#6DFDFF

Gradients from #49fdff

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, #86FEFF, #49fdff 45%, #007E80);
Duotone
A short hue run reads richer than a flat fill
background: linear-gradient(120deg, #49fdff, #2A5DFF);
Complement sweep
Loud — keep it behind large type only
background: linear-gradient(90deg, #49fdff, #FF4B49);
Spotlight
Hero panels and app headers
background: radial-gradient(120% 120% at 20% 0%, #A5FEFF 0%, #49fdff 45%, #007E80 100%);
Soft wash
Section backgrounds that stay readable
background: linear-gradient(180deg, #F4FAFA, #ffffff);
Mesh
Ambient background, no image weight
background: radial-gradient(60% 60% at 15% 20%, #7CFFB4 0%, transparent 60%), radial-gradient(55% 55% at 85% 15%, #68A5FF 0%, transparent 60%), radial-gradient(70% 70% at 50% 95%, #007E80 0%, transparent 65%), #49fdff;

Monochromatic scale

Palettes built from #49fdff

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.

#49fdff in the real world

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

Industries
TechnologyTravelHealthcareMedia
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 16.78:1.

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.

#49fdff, answered

What color is #49fdff?

#49fdff is a balanced electric cyan, closest to Cyan (ΔE2000 1.7). It sits at 181° on the hue wheel with 100% saturation and 64% lightness, which reads as cool.

What is the RGB value of #49fdff?

rgb(73, 253, 255) — 73 red, 253 green and 255 blue out of 255, or 28.6% / 99.2% / 100% by channel.

What is #49fdff in HSL and HSV?

hsl(181, 100%, 64%) and hsv(181, 71%, 100%). HSL is what CSS takes; HSV is what your design tool's picker shows, which is why the saturation numbers rarely match.

Is #49fdff a light or a dark color?

It is a light color. Relative luminance is 0.7889 and perceived brightness is 85%, so black text on it reaches 16.78:1.

Should I use black or white text on #49fdff?

Black. It scores 16.78:1 against #49fdff, versus 1.25:1 for white — AAA at any size.

Is #49fdff accessible on a white background?

#49fdff on white scores 1.25:1, which fails WCAG AA at every size. Darken it to #008081 to reach 4.5:1, or #006162 for 7:1.

What is the complementary color of #49fdff?

#FF4B49 sits directly opposite on the wheel. Softer options are the split-complements #FF49A2 and #FFA649, which give the same contrast with far less vibration.

What colors go well with #49fdff?

For interface work: #F4FAFA as the surface, #C0ECED for borders, #4B9A9B for secondary text, #FF4974 as an accent and #007E80 for hover and pressed states. For a palette, the analogous pair #49FFA6 and #49A2FF stays calm, while #FF4B49 is the loudest partner.

What is #49fdff in CMYK for printing?

cmyk(71%, 1%, 0%, 0%). 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 #49fdff warm or cool?

Cool — it scores 88 on a scale where 0 is the warmest orange and 100 the coolest azure. Nudged warmer it becomes #49FFBE; nudged cooler, #49CDFF.

Which Tailwind color is closest to #49fdff?

The teal family — its 500 step is #14b8a6, ΔE2000 18.1 away. That is a visible difference, so define #49fdff as a custom token rather than reaching for the built-in.

How do I use #49fdff in Tailwind CSS?

Inline it as an arbitrary value with bg-[#49fdff] or text-[#49fdff], 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 #49fdff with 50% opacity?

rgba(73, 253, 255, 0.5), or #49fdff80 in eight-digit hex. Over white that composites to #A4FEFF; over black, #257F80.

Is #49fdff a web-safe color?

No. The nearest web-safe colour is #33FFFF, ΔE2000 1.1 away. The palette only matters for legacy displays and some email clients now.

What does the color #49fdff mean?

As a cyan, it reads clean, technical, fresh. Cyan reads as water, air and infrastructure: cool, hygienic, engineered. At this chroma the effect is amplified — it will dominate whatever sits beside it.

What gradient works with #49fdff?

The safest is same-hue elevation: linear-gradient(135deg, #86FEFF, #49fdff 45%, #007E80). For more colour, a short hue run to #2A5DFF keeps it rich without turning muddy.

Work with #49fdff in the Color Lab

Every tool opens with this colour already loaded.

Every value on this page is computed from #49fdff at request time — conversions, contrast ratios and ΔE distances are calculated, never looked up.