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cyan · cool

#35ade8

a balanced, electric cyan · cool · closest name: Deep Sky Blue

Token name suggestion: True Glacier

RGB
53, 173, 232
HSL
200°, 80%, 56%
CMYK
77, 25, 0, 9
Luminance
0.3647

#35ade8 is a balanced electric cyan, 200° on the wheel and 96/100 on the cool side. Put black text on it (8.29:1). As text it scores 2.53:1 on white — use #147EB2 instead. Nearest name is Deep Sky Blue, nearest Tailwind family is sky.

hsl(200 80% 56%)rgb(53 173 232)Base step 500AAA inkCool

At a glance

Every number on this page in one read: what #35ade8 is made of, how bright it looks, and which way it leans.

Hex
#35ade8
Hue
200°
cyan
Saturation
80%
electric
Lightness
56%
balanced
Brightness
91%
HSV value
Perceived
61%
weighted brightness
Luminance
0.3647
WCAG relative
Temperature
Cool
96/100 cool
Color family
Cyan
Tone
Electric
Best ink
Black
8.29:1
Closest name
Deep Sky Blue
ΔE2000 5.2
Chroma
41.0
LCH, 0–130ish
OKLCH L
0.708
perceptual lightness
Tailwind
sky
500 · ΔE 2.9
Web-safe
#3399FF
nearest of 216
Where it sits
Hue200° of 360°
Saturation80%
Lightness56%
Saturation × lightness field

Left edge is grey, right edge is full chroma; top is white, bottom is black. The dot is #35ade8.

Temperature
Warm ← → Cool96% 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%
Green82%
Blue16%

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

Every format

HEX#35ade8
HEX (8-digit)#35ade8ff
RGBrgb(53, 173, 232)
RGBArgba(53, 173, 232, 1)
HSLhsl(200, 80%, 56%)
HSV / HSBhsv(200, 77%, 91%)
HWBhwb(200 21% 9%)
CMYKcmyk(77%, 25%, 0%, 9%)
LABlab(66.9 -13.2 -38.9)
LCHlch(66.9 41.0 251.3)
OKLCHoklch(0.708 0.134 235.2)
XYZ (D65)xyz(30.97, 36.47, 81.73)
Decimal3517928
Display P3color(display-p3 0.208 0.678 0.910)
Web-safe#3399FF

Copy-ready code

every platformclick to select
/* CSS */
color: #35ade8;
background-color: #35ade8;
/* CSS custom property */
--brand: #35ade8;
/* Tailwind (arbitrary) */
class="text-[#35ade8] bg-[#35ade8]"
/* SCSS */
$brand: #35ade8;
/* SwiftUI */
Color(red: 0.208, green: 0.678, blue: 0.910)
/* UIKit */
UIColor(red: 0.208, green: 0.678, blue: 0.910, alpha: 1)
/* Android XML */
<color name="brand">#35ADE8</color>
/* Android Compose */
Color(0xFF35ADE8)
/* Flutter */
Color(0xFF35ADE8)
/* Python / OpenCV (BGR) */
(232, 173, 53)
/* Python / PIL (RGB) */
(53, 173, 232)
/* Java AWT */
new Color(53, 173, 232)
/* .NET */
Color.FromArgb(255, 53, 173, 232)
/* OpenGL / Unity (0–1) */
(0.2078f, 0.6784f, 0.9098f, 1f)
/* LaTeX */
\definecolor{brand}{RGB}{53,173,232}
modern cssclick to select
/* mix without leaving CSS */
background: color-mix(in oklab, #35ade8 85%, white);
border-color: color-mix(in oklab, #35ade8 40%, transparent);
/* theme-aware in one line */
color: light-dark(#0D5172, #D3E5EE);
/* relative colour syntax */
--hover: hsl(from #35ade8 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: #F3F9FC;
  --brand-100: #E6F3F9;
  --brand-200: #C7E6F5;
  --brand-300: #9AD6F4;
  --brand-400: #68C2EE;
  --brand-500: #35ade8;
  --brand-600: #199CDC;
  --brand-700: #1582B7;
  --brand-800: #116893;
  --brand-900: #104C6A;
  --brand-950: #0A3042;
  --brand: #35ade8;
  --brand-ink: #000000;
  --brand-surface: #F4F8FA;
  --brand-border: #C0DEED;
  --brand-hover: #199EE0;
  --brand-pressed: #1688C0;
}
@media (prefers-color-scheme: dark) {
  :root {
    --brand-surface: #141F24;
    --brand-ink: #D3E5EE;
  }
}
tailwind.config.jsclick to select
theme: {
  extend: {
    colors: {
      brand: {
        50: '#F3F9FC',
        100: '#E6F3F9',
        200: '#C7E6F5',
        300: '#9AD6F4',
        400: '#68C2EE',
        500: '#35ade8',
        600: '#199CDC',
        700: '#1582B7',
        800: '#116893',
        900: '#104C6A',
        950: '#0A3042',
        DEFAULT: '#35ade8',
      },
    },
  },
}
scss mapclick to select
$brand: (
  '50': #F3F9FC,
  '100': #E6F3F9,
  '200': #C7E6F5,
  '300': #9AD6F4,
  '400': #68C2EE,
  '500': #35ade8,
  '600': #199CDC,
  '700': #1582B7,
  '800': #116893,
  '900': #104C6A,
  '950': #0A3042,
);
$brand-base: #35ade8;
$brand-ink: #000000;

@function brand($step) { @return map-get($brand, $step); }
w3c design tokens (json)click to select
{
  "color": {
    "brand": {
      "50": { "$value": "#F3F9FC", "$type": "color" },
      "100": { "$value": "#E6F3F9", "$type": "color" },
      "200": { "$value": "#C7E6F5", "$type": "color" },
      "300": { "$value": "#9AD6F4", "$type": "color" },
      "400": { "$value": "#68C2EE", "$type": "color" },
      "500": { "$value": "#35ade8", "$type": "color" },
      "600": { "$value": "#199CDC", "$type": "color" },
      "700": { "$value": "#1582B7", "$type": "color" },
      "800": { "$value": "#116893", "$type": "color" },
      "900": { "$value": "#104C6A", "$type": "color" },
      "950": { "$value": "#0A3042", "$type": "color" }
    },
    "brandInk": { "$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 #35ade8 · 8.29:1
Use #000000AAA at every size.
Aa
12px
Aa
16px
Aa
24px
Aa
White text · 2.53:1
AA fail · AA large fail · AAA fail
Aa
Black text · 8.29:1 · recommended
AA pass · AA large pass · AAA pass
Reading the other direction: #35ade8 as text scores 2.53:1 on white and 8.29:1 on black.
Best tinted ink on it, if plain black or white feels flat: #0D5172 at 3.40:1.

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
#147EB2 · 4.51:1
AA on white−17% L
#147EB2
The quick fox
#0F5E84 · 7.11:1
AAA on white−27% L
#0F5E84
The quick fox
#35ade8 · 8.29:1
AA on blackalready passes
#35ade8
The quick fox
#35ade8 · 8.29:1
AAA on blackalready passes
#35ade8

Large text — 24px regular or 18.66px bold and above — only needs 3:1, so #199EE0 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
#35ade8 on white: 2.53:1
AA ✗ fail · AA-large · AAA
Aa
#35ade8 on black: 8.29:1
AA ✓ pass · AA-large · AAA
Against the neutral ladder

Contrast is symmetric, so each row covers both directions: #35ade8 as text on that neutral, and that neutral as text on #35ade8.

NeutralRatioBoth directions
White2.53:1AaAa
Slate 502.42:1AaAa
Slate 1002.31:1AaAa
Slate 2002.05:1AaAa
Slate 3001.71:1AaAa
Slate 4001.01:1AaAa
Slate 5001.88:1AaAa
Slate 6002.99:1AaAa
Slate 7004.09:1AaAa
Slate 8005.78:1AaAa
Slate 9007.05:1AaAa
Black8.29:1AaAa
Colour vision deficiency
true color
protanopia · #90ACEB
deuteranopia · #789BE7
tritanopia · #00BCC1

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. #35ade8 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.

#F3F9FC
#E6F3F9
#C7E6F5
#9AD6F4
#68C2EE
#35ade8
#199CDC
#1582B7
#116893
#104C6A
#0A3042
Base = 500Lightest = 50 · #F3F9FCDarkest = 950 · #0A3042Text step on white = 800
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 0.033 235.2);
  --brand-100: oklch(0.94 0.053 235.2);
  --brand-200: oklch(0.88 0.080 235.2);
  --brand-300: oklch(0.80 0.104 235.2);
  --brand-400: oklch(0.72 0.123 235.2);
  --brand-500: oklch(0.64 0.134 235.2);
  --brand-600: oklch(0.56 0.134 235.2);
  --brand-700: oklch(0.48 0.126 235.2);
  --brand-800: oklch(0.40 0.112 235.2);
  --brand-900: oklch(0.32 0.094 235.2);
  --brand-950: oklch(0.24 0.074 235.2);
}

Colors that work with #35ade8

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#F4F8FA
Tinted page background
Border#C0DEED
Hairlines and dividers
Muted text#4B809B
Captions on the surface
Accent#ED4031
Second voice, not a rival
Dark variant#0D5172
Hover, pressed, headers
Light variant#E8F6FC
Selected rows, tints
Dark surface#141F24
Dark-mode background
Hover#199EE0
One step down in lightness
Pressed#1688C0
Two steps down
Disabled#BACBD3
Chroma pulled out
Focus ring#3DB8F4
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 #35ade8

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 #0D5172
Safe as a 1px border on white
No — use #199EE0

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
  • Weight44/100
  • 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#E87035
Analogous left#35E8CA
Analogous right#3553E8
Split-complement 1#E83553
Split-complement 2#E8CA35
Triadic 1#E835AD
Triadic 2#ADE835
Tetradic#CA35E8
On the wheel
Base+30°−30°+120°+240°+180°200°

#35ade8 sits at 200°. Every dot is a harmony position and links to its own page in the table alongside.

RGB percentages

Red20.8%
Green67.8%
Blue91.0%
R · 0–255
53
0x35
G · 0–255
173
0xad
B · 0–255
232
0xe8

CMYK percentages

Cyan77.2%
Magenta25.4%
Yellow0.0%
Key (black)9.0%

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

Color previews

#35ade8 text on a black background

contrast 8.29:1

Card sample

#35ade8 text on a white background

contrast 2.53:1

Card sample

#35ade8 on grey

2.31:1

#35ade8 on its own surface

2.37:1

#35ade8 on its dark surface

6.63:1

CSS3 live lab

Text font color

The quick brown fox

color: #35ade8;
Background color
Panel with #35ade8 background
background-color: #35ade8;
Text shadow — hex

Glowing headline

text-shadow: 2px 2px 8px #35ade8;
Text shadow — RGB

Soft neon halo

text-shadow: 0 0 14px rgba(53, 173, 232, 0.45);
Div box shadow
Elevated card
box-shadow: 0 12px 32px -8px rgba(53, 173, 232, 0.45);
Border & gradient
Gradient panel
border: 3px solid #35ade8;
background: linear-gradient(135deg, #35ade8, #3536E8);
Gradient text

Gradient headline

background: linear-gradient(90deg, #35ade8, #6135E8);
-webkit-background-clip: text;
color: transparent;
Focus ring
Focused control
outline: 2px solid #35ade8;
outline-offset: 3px;
Underline & caret

Marked up text

text-decoration-color: #35ade8;
caret-color: #35ade8;
Left rule
Pull quote or callout
border-left: 4px solid #35ade8;
Ring + tint
Selected chip
background: #E8F6FC;
box-shadow: inset 0 0 0 2px #35ade8;
Conic badge
68%
background: conic-gradient(#35ade8 68%, #e2e8f0 0);

Transparency

What each alpha value actually composites to. The top row is #35ade8 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(53, 173, 232, 0.5)
rgb(53 173 232 / 50%)
#35ade880
hsl(200 80% 56% / 50%)
color-mix(in srgb, #35ade8 50%, transparent)
Alpha8-digit hexFlat on white
10%#35ade81a#EBF7FD
20%#35ade833#D7EFFA
40%#35ade866#AEDEF6
60%#35ade899#86CEF1
80%#35ade8cc#5DBDED

Gradients from #35ade8

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, #6CC3EE, #35ade8 45%, #0D5172);
Duotone
A short hue run reads richer than a flat fill
background: linear-gradient(120deg, #35ade8, #2A1AE5);
Complement sweep
Loud — keep it behind large type only
background: linear-gradient(90deg, #35ade8, #E87035);
Spotlight
Hero panels and app headers
background: radial-gradient(120% 120% at 20% 0%, #87CEF1 0%, #35ade8 45%, #0D5172 100%);
Soft wash
Section backgrounds that stay readable
background: linear-gradient(180deg, #F4F8FA, #ffffff);
Mesh
Ambient background, no image weight
background: radial-gradient(60% 60% at 15% 20%, #63EDCA 0%, transparent 60%), radial-gradient(55% 55% at 85% 15%, #515EEB 0%, transparent 60%), radial-gradient(70% 70% at 50% 95%, #0D5172 0%, transparent 65%), #35ade8;

Monochromatic scale

Palettes built from #35ade8

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.

#35ade8 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 8.29:1.

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.

#35ade8, answered

What color is #35ade8?

#35ade8 is a balanced electric cyan, closest to Deep Sky Blue (ΔE2000 5.2). It sits at 200° on the hue wheel with 80% saturation and 56% lightness, which reads as cool.

What is the RGB value of #35ade8?

rgb(53, 173, 232) — 53 red, 173 green and 232 blue out of 255, or 20.8% / 67.8% / 91% by channel.

What is #35ade8 in HSL and HSV?

hsl(200, 80%, 56%) and hsv(200, 77%, 91%). HSL is what CSS takes; HSV is what your design tool's picker shows, which is why the saturation numbers rarely match.

Is #35ade8 a light or a dark color?

It is a mid-tone. Relative luminance is 0.3647 and perceived brightness is 61%, so black text on it reaches 8.29:1.

Should I use black or white text on #35ade8?

Black. It scores 8.29:1 against #35ade8, versus 2.53:1 for white — AAA at any size.

Is #35ade8 accessible on a white background?

#35ade8 on white scores 2.53:1, which fails WCAG AA at every size. Darken it to #147EB2 to reach 4.5:1, or #0F5E84 for 7:1.

What is the complementary color of #35ade8?

#E87035 sits directly opposite on the wheel. Softer options are the split-complements #E83553 and #E8CA35, which give the same contrast with far less vibration.

What colors go well with #35ade8?

For interface work: #F4F8FA as the surface, #C0DEED for borders, #4B809B for secondary text, #ED4031 as an accent and #0D5172 for hover and pressed states. For a palette, the analogous pair #35E8CA and #3553E8 stays calm, while #E87035 is the loudest partner.

What is #35ade8 in CMYK for printing?

cmyk(77%, 25%, 0%, 9%). 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 #35ade8 warm or cool?

Cool — it scores 96 on a scale where 0 is the warmest orange and 100 the coolest azure. Nudged warmer it becomes #35E8E1; nudged cooler, #339BEA.

Which Tailwind color is closest to #35ade8?

The sky family — its 500 step is #0ea5e9, ΔE2000 2.9 away. That is close enough to swap in without anyone noticing.

How do I use #35ade8 in Tailwind CSS?

Inline it as an arbitrary value with bg-[#35ade8] or text-[#35ade8], 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 #35ade8 with 50% opacity?

rgba(53, 173, 232, 0.5), or #35ade880 in eight-digit hex. Over white that composites to #9AD6F4; over black, #1B5774.

Is #35ade8 a web-safe color?

No. The nearest web-safe colour is #3399FF, ΔE2000 9.8 away. The palette only matters for legacy displays and some email clients now.

What does the color #35ade8 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 #35ade8?

The safest is same-hue elevation: linear-gradient(135deg, #6CC3EE, #35ade8 45%, #0D5172). For more colour, a short hue run to #2A1AE5 keeps it rich without turning muddy.

Work with #35ade8 in the Color Lab

Every tool opens with this colour already loaded.

Every value on this page is computed from #35ade8 at request time — conversions, contrast ratios and ΔE distances are calculated, never looked up.