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cyan · cool

#17ffeb

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

Token name suggestion: Atlas Teal

RGB
23, 255, 235
HSL
175°, 100%, 55%
CMYK
91, 0, 8, 0
Luminance
0.7770

#17ffeb is a balanced electric cyan, 175° on the wheel and 85/100 on the cool side. Put black text on it (16.54:1). As text it scores 1.27:1 on white — use #008277 instead. Nearest name is Cyan, nearest Tailwind family is teal.

hsl(175 100% 55%)rgb(23 255 235)Base step 500AAA inkCool

At a glance

Every number on this page in one read: what #17ffeb is made of, how bright it looks, and which way it leans.

Hex
#17ffeb
Hue
175°
cyan
Saturation
100%
electric
Lightness
55%
balanced
Brightness
100%
HSV value
Perceived
83%
weighted brightness
Luminance
0.7770
WCAG relative
Temperature
Cool
85/100 cool
Color family
Cyan
Tone
Electric
Best ink
Black
16.54:1
Closest name
Cyan
ΔE2000 6.1
Chroma
53.3
LCH, 0–130ish
OKLCH L
0.900
perceptual lightness
Tailwind
teal
500 · ΔE 16.7
Web-safe
#00FFFF
nearest of 216
Where it sits
Hue175° of 360°
Saturation100%
Lightness55%
Saturation × lightness field

Left edge is grey, right edge is full chroma; top is white, bottom is black. The dot is #17ffeb.

Temperature
Warm ← → Cool85% 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
Red0%
Green92%
Blue8%

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

Every format

HEX#17ffeb
HEX (8-digit)#17ffebff
RGBrgb(23, 255, 235)
RGBArgba(23, 255, 235, 1)
HSLhsl(175, 100%, 55%)
HSV / HSBhsv(175, 91%, 100%)
HWBhwb(175 9% 0%)
CMYKcmyk(91%, 0%, 8%, 0%)
LABlab(90.6 -53.1 -4.5)
LCHlch(90.6 53.3 184.8)
OKLCHoklch(0.900 0.157 184.7)
XYZ (D65)xyz(51.10, 77.69, 90.88)
Decimal1572843
Display P3color(display-p3 0.090 1.000 0.922)
Web-safe#00FFFF

Copy-ready code

every platformclick to select
/* CSS */
color: #17ffeb;
background-color: #17ffeb;
/* CSS custom property */
--brand: #17ffeb;
/* Tailwind (arbitrary) */
class="text-[#17ffeb] bg-[#17ffeb]"
/* SCSS */
$brand: #17ffeb;
/* SwiftUI */
Color(red: 0.090, green: 1.000, blue: 0.922)
/* UIKit */
UIColor(red: 0.090, green: 1.000, blue: 0.922, alpha: 1)
/* Android XML */
<color name="brand">#17FFEB</color>
/* Android Compose */
Color(0xFF17FFEB)
/* Flutter */
Color(0xFF17FFEB)
/* Python / OpenCV (BGR) */
(235, 255, 23)
/* Python / PIL (RGB) */
(23, 255, 235)
/* Java AWT */
new Color(23, 255, 235)
/* .NET */
Color.FromArgb(255, 23, 255, 235)
/* OpenGL / Unity (0–1) */
(0.0902f, 1.0000f, 0.9216f, 1f)
/* LaTeX */
\definecolor{brand}{RGB}{23,255,235}
modern cssclick to select
/* mix without leaving CSS */
background: color-mix(in oklab, #17ffeb 85%, white);
border-color: color-mix(in oklab, #17ffeb 40%, transparent);
/* theme-aware in one line */
color: light-dark(#008074, #D3EEEC);
/* relative colour syntax */
--hover: hsl(from #17ffeb 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: #F1FEFD;
  --brand-100: #E3FCFA;
  --brand-200: #C0FCF7;
  --brand-300: #8FFFF5;
  --brand-400: #57FFF0;
  --brand-500: #17ffeb;
  --brand-600: #00F5E0;
  --brand-700: #00CCBA;
  --brand-800: #00A395;
  --brand-900: #05766C;
  --brand-950: #034943;
  --brand: #17ffeb;
  --brand-ink: #000000;
  --brand-surface: #F4FAFA;
  --brand-border: #C0EDE9;
  --brand-hover: #00F2DD;
  --brand-pressed: #00CFBD;
}
@media (prefers-color-scheme: dark) {
  :root {
    --brand-surface: #142423;
    --brand-ink: #D3EEEC;
  }
}
tailwind.config.jsclick to select
theme: {
  extend: {
    colors: {
      brand: {
        50: '#F1FEFD',
        100: '#E3FCFA',
        200: '#C0FCF7',
        300: '#8FFFF5',
        400: '#57FFF0',
        500: '#17ffeb',
        600: '#00F5E0',
        700: '#00CCBA',
        800: '#00A395',
        900: '#05766C',
        950: '#034943',
        DEFAULT: '#17ffeb',
      },
    },
  },
}
scss mapclick to select
$brand: (
  '50': #F1FEFD,
  '100': #E3FCFA,
  '200': #C0FCF7,
  '300': #8FFFF5,
  '400': #57FFF0,
  '500': #17ffeb,
  '600': #00F5E0,
  '700': #00CCBA,
  '800': #00A395,
  '900': #05766C,
  '950': #034943,
);
$brand-base: #17ffeb;
$brand-ink: #000000;

@function brand($step) { @return map-get($brand, $step); }
w3c design tokens (json)click to select
{
  "color": {
    "brand": {
      "50": { "$value": "#F1FEFD", "$type": "color" },
      "100": { "$value": "#E3FCFA", "$type": "color" },
      "200": { "$value": "#C0FCF7", "$type": "color" },
      "300": { "$value": "#8FFFF5", "$type": "color" },
      "400": { "$value": "#57FFF0", "$type": "color" },
      "500": { "$value": "#17ffeb", "$type": "color" },
      "600": { "$value": "#00F5E0", "$type": "color" },
      "700": { "$value": "#00CCBA", "$type": "color" },
      "800": { "$value": "#00A395", "$type": "color" },
      "900": { "$value": "#05766C", "$type": "color" },
      "950": { "$value": "#034943", "$type": "color" }
    },
    "brandInk": { "$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 #17ffeb · 16.54:1
Use #000000AAA at every size.
Aa
12px
Aa
16px
Aa
24px
Aa
White text · 1.27:1
AA fail · AA large fail · AAA fail
Aa
Black text · 16.54:1 · recommended
AA pass · AA large pass · AAA pass
Reading the other direction: #17ffeb as text scores 1.27:1 on white and 16.54:1 on black.
Best tinted ink on it, if plain black or white feels flat: #008074 at 3.81:1.

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
#008277 · 4.71:1
AA on white−29% L
#008277
The quick fox
#00635B · 7.15:1
AAA on white−35% L
#00635B
The quick fox
#17ffeb · 16.54:1
AA on blackalready passes
#17ffeb
The quick fox
#17ffeb · 16.54:1
AAA on blackalready passes
#17ffeb

Large text — 24px regular or 18.66px bold and above — only needs 3:1, so #00A697 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
#17ffeb on white: 1.27:1
AA ✗ fail · AA-large · AAA
Aa
#17ffeb on black: 16.54:1
AA ✓ pass · AA-large · AAA
Against the neutral ladder

Contrast is symmetric, so each row covers both directions: #17ffeb as text on that neutral, and that neutral as text on #17ffeb.

NeutralRatioBoth directions
White1.27:1AaAa
Slate 501.21:1AaAa
Slate 1001.16:1AaAa
Slate 2001.03:1AaAa
Slate 3001.17:1AaAa
Slate 4002.02:1AaAa
Slate 5003.75:1AaAa
Slate 6005.97:1AaAa
Slate 7008.16:1AaAa
Slate 80011.52:1AaAa
Slate 90014.06:1AaAa
Black16.54:1AaAa
Colour vision deficiency
true color
protanopia · #F1F0EA
deuteranopia · #D6DCED
tritanopia · #00FFF9

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. #17ffeb is pinned to step 500; the rest hold its hue and let saturation ease off at the extremes so the pale end never turns neon.

#F1FEFD
#E3FCFA
#C0FCF7
#8FFFF5
#57FFF0
#17ffeb
#00F5E0
#00CCBA
#00A395
#05766C
#034943
Base = 500Lightest = 50 · #F1FEFDDarkest = 950 · #034943Text 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 0.039 184.7);
  --brand-100: oklch(0.94 0.063 184.7);
  --brand-200: oklch(0.88 0.094 184.7);
  --brand-300: oklch(0.80 0.122 184.7);
  --brand-400: oklch(0.72 0.144 184.7);
  --brand-500: oklch(0.64 0.157 184.7);
  --brand-600: oklch(0.56 0.157 184.7);
  --brand-700: oklch(0.48 0.147 184.7);
  --brand-800: oklch(0.40 0.132 184.7);
  --brand-900: oklch(0.32 0.110 184.7);
  --brand-950: oklch(0.24 0.086 184.7);
}

Colors that work with #17ffeb

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#C0EDE9
Hairlines and dividers
Muted text#4B9B94
Captions on the surface
Accent#FF1765
Second voice, not a rival
Dark variant#008074
Hover, pressed, headers
Light variant#E5FFFD
Selected rows, tints
Dark surface#142423
Dark-mode background
Hover#00F2DD
One step down in lightness
Pressed#00CFBD
Two steps down
Disabled#B6D0CE
Chroma pulled out
Focus ring#2BFFED
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 #17ffeb

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 #008074
Safe as a 1px border on white
No — use #00A697

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
  • Weight46/100
  • 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#FF172B
Analogous left#17FF77
Analogous right#179FFF
Split-complement 1#FF179F
Split-complement 2#FF7717
Triadic 1#EB17FF
Triadic 2#FFEB17
Tetradic#7717FF
On the wheel
Base+30°−30°+120°+240°+180°175°

#17ffeb sits at 175°. Every dot is a harmony position and links to its own page in the table alongside.

RGB percentages

Red9.0%
Green100.0%
Blue92.2%
R · 0–255
23
0x17
G · 0–255
255
0xff
B · 0–255
235
0xeb

CMYK percentages

Cyan91.0%
Magenta0.0%
Yellow7.8%
Key (black)0.0%

Total ink coverage is 99%. Most commercial presses cap around 300% — above that, sheets stop drying properly.

Color previews

#17ffeb text on a black background

contrast 16.54:1

Card sample

#17ffeb text on a white background

contrast 1.27:1

Card sample

#17ffeb on grey

1.16:1

#17ffeb on its own surface

1.20:1

#17ffeb on its dark surface

12.66:1

CSS3 live lab

Text font color

The quick brown fox

color: #17ffeb;
Background color
Panel with #17ffeb background
background-color: #17ffeb;
Text shadow — hex

Glowing headline

text-shadow: 2px 2px 8px #17ffeb;
Text shadow — RGB

Soft neon halo

text-shadow: 0 0 14px rgba(23, 255, 235, 0.45);
Div box shadow
Elevated card
box-shadow: 0 12px 32px -8px rgba(23, 255, 235, 0.45);
Border & gradient
Gradient panel
border: 3px solid #17ffeb;
background: linear-gradient(135deg, #17ffeb, #1778FF);
Gradient text

Gradient headline

background: linear-gradient(90deg, #17ffeb, #173EFF);
-webkit-background-clip: text;
color: transparent;
Focus ring
Focused control
outline: 2px solid #17ffeb;
outline-offset: 3px;
Underline & caret

Marked up text

text-decoration-color: #17ffeb;
caret-color: #17ffeb;
Left rule
Pull quote or callout
border-left: 4px solid #17ffeb;
Ring + tint
Selected chip
background: #E5FFFD;
box-shadow: inset 0 0 0 2px #17ffeb;
Conic badge
68%
background: conic-gradient(#17ffeb 68%, #e2e8f0 0);

Transparency

What each alpha value actually composites to. The top row is #17ffeb 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(23, 255, 235, 0.5)
rgb(23 255 235 / 50%)
#17ffeb80
hsl(175 100% 55% / 50%)
color-mix(in srgb, #17ffeb 50%, transparent)
Alpha8-digit hexFlat on white
10%#17ffeb1a#E8FFFD
20%#17ffeb33#D1FFFB
40%#17ffeb66#A2FFF7
60%#17ffeb99#74FFF3
80%#17ffebcc#45FFEF

Gradients from #17ffeb

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, #54FFF0, #17ffeb 45%, #008074);
Duotone
A short hue run reads richer than a flat fill
background: linear-gradient(120deg, #17ffeb, #0053F7);
Complement sweep
Loud — keep it behind large type only
background: linear-gradient(90deg, #17ffeb, #FF172B);
Spotlight
Hero panels and app headers
background: radial-gradient(120% 120% at 20% 0%, #73FFF3 0%, #17ffeb 45%, #008074 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%, #4AFF86 0%, transparent 60%), radial-gradient(55% 55% at 85% 15%, #369BFF 0%, transparent 60%), radial-gradient(70% 70% at 50% 95%, #008074 0%, transparent 65%), #17ffeb;

Monochromatic scale

Palettes built from #17ffeb

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.

#17ffeb 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 16.54:1.

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.

#17ffeb, answered

What color is #17ffeb?

#17ffeb is a balanced electric cyan, closest to Cyan (ΔE2000 6.1). It sits at 175° on the hue wheel with 100% saturation and 55% lightness, which reads as cool.

What is the RGB value of #17ffeb?

rgb(23, 255, 235) — 23 red, 255 green and 235 blue out of 255, or 9% / 100% / 92.2% by channel.

What is #17ffeb in HSL and HSV?

hsl(175, 100%, 55%) and hsv(175, 91%, 100%). HSL is what CSS takes; HSV is what your design tool's picker shows, which is why the saturation numbers rarely match.

Is #17ffeb a light or a dark color?

It is a light color. Relative luminance is 0.7770 and perceived brightness is 83%, so black text on it reaches 16.54:1.

Should I use black or white text on #17ffeb?

Black. It scores 16.54:1 against #17ffeb, versus 1.27:1 for white — AAA at any size.

Is #17ffeb accessible on a white background?

#17ffeb on white scores 1.27:1, which fails WCAG AA at every size. Darken it to #008277 to reach 4.5:1, or #00635B for 7:1.

What is the complementary color of #17ffeb?

#FF172B sits directly opposite on the wheel. Softer options are the split-complements #FF179F and #FF7717, which give the same contrast with far less vibration.

What colors go well with #17ffeb?

For interface work: #F4FAFA as the surface, #C0EDE9 for borders, #4B9B94 for secondary text, #FF1765 as an accent and #008074 for hover and pressed states. For a palette, the analogous pair #17FF77 and #179FFF stays calm, while #FF172B is the loudest partner.

What is #17ffeb in CMYK for printing?

cmyk(91%, 0%, 8%, 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 #17ffeb warm or cool?

Cool — it scores 85 on a scale where 0 is the warmest orange and 100 the coolest azure. Nudged warmer it becomes #17FF96; nudged cooler, #17D0FF.

Which Tailwind color is closest to #17ffeb?

The teal family — its 500 step is #14b8a6, ΔE2000 16.7 away. That is a visible difference, so define #17ffeb as a custom token rather than reaching for the built-in.

How do I use #17ffeb in Tailwind CSS?

Inline it as an arbitrary value with bg-[#17ffeb] or text-[#17ffeb], 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 #17ffeb with 50% opacity?

rgba(23, 255, 235, 0.5), or #17ffeb80 in eight-digit hex. Over white that composites to #8BFFF5; over black, #0C8076.

Is #17ffeb a web-safe color?

No. The nearest web-safe colour is #00FFFF, ΔE2000 6.1 away. The palette only matters for legacy displays and some email clients now.

What does the color #17ffeb 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 #17ffeb?

The safest is same-hue elevation: linear-gradient(135deg, #54FFF0, #17ffeb 45%, #008074). For more colour, a short hue run to #0053F7 keeps it rich without turning muddy.

Work with #17ffeb in the Color Lab

Every tool opens with this colour already loaded.

Every value on this page is computed from #17ffeb at request time — conversions, contrast ratios and ΔE distances are calculated, never looked up.