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cyan · cool

#64facd

a light, electric cyan · cool · closest name: Aqua Marine

Token name suggestion: Linen Reef

RGB
100, 250, 205
HSL
162°, 94%, 69%
CMYK
60, 0, 18, 2
Luminance
0.7549

#64facd is a light electric cyan, 162° on the wheel and 80/100 on the cool side. Put black text on it (16.10:1). As text it scores 1.30:1 on white — use #04835D instead. Nearest name is Aqua Marine, nearest Tailwind family is emerald.

hsl(162 94% 69%)rgb(100 250 205)Base step 400AAA inkCool

At a glance

Every number on this page in one read: what #64facd is made of, how bright it looks, and which way it leans.

Hex
#64facd
Hue
162°
cyan
Saturation
94%
electric
Lightness
69%
light
Brightness
98%
HSV value
Perceived
83%
weighted brightness
Luminance
0.7549
WCAG relative
Temperature
Cool
80/100 cool
Color family
Cyan
Tone
Electric
Best ink
Black
16.10:1
Closest name
Aqua Marine
ΔE2000 2.2
Chroma
51.4
LCH, 0–130ish
OKLCH L
0.892
perceptual lightness
Tailwind
emerald
500 · ΔE 16.5
Web-safe
#66FFCC
nearest of 216
Where it sits
Hue162° of 360°
Saturation94%
Lightness69%
Saturation × lightness field

Left edge is grey, right edge is full chroma; top is white, bottom is black. The dot is #64facd.

Temperature
Warm ← → Cool80% 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
Red4%
Green91%
Blue6%

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

Every format

HEX#64facd
HEX (8-digit)#64facdff
RGBrgb(100, 250, 205)
RGBArgba(100, 250, 205, 1)
HSLhsl(162, 94%, 69%)
HSV / HSBhsv(162, 60%, 98%)
HWBhwb(162 39% 2%)
CMYKcmyk(60%, 0%, 18%, 2%)
LABlab(89.6 -50.4 9.8)
LCHlch(89.6 51.4 169.0)
OKLCHoklch(0.892 0.144 170.0)
XYZ (D65)xyz(50.46, 75.48, 69.66)
Decimal6617805
Display P3color(display-p3 0.392 0.980 0.804)
Web-safe#66FFCC

Copy-ready code

every platformclick to select
/* CSS */
color: #64facd;
background-color: #64facd;
/* CSS custom property */
--brand: #64facd;
/* Tailwind (arbitrary) */
class="text-[#64facd] bg-[#64facd]"
/* SCSS */
$brand: #64facd;
/* SwiftUI */
Color(red: 0.392, green: 0.980, blue: 0.804)
/* UIKit */
UIColor(red: 0.392, green: 0.980, blue: 0.804, alpha: 1)
/* Android XML */
<color name="brand">#64FACD</color>
/* Android Compose */
Color(0xFF64FACD)
/* Flutter */
Color(0xFF64FACD)
/* Python / OpenCV (BGR) */
(205, 250, 100)
/* Python / PIL (RGB) */
(100, 250, 205)
/* Java AWT */
new Color(100, 250, 205)
/* .NET */
Color.FromArgb(255, 100, 250, 205)
/* OpenGL / Unity (0–1) */
(0.3922f, 0.9804f, 0.8039f, 1f)
/* LaTeX */
\definecolor{brand}{RGB}{100,250,205}
modern cssclick to select
/* mix without leaving CSS */
background: color-mix(in oklab, #64facd 85%, white);
border-color: color-mix(in oklab, #64facd 40%, transparent);
/* theme-aware in one line */
color: light-dark(#047B58, #D3EEE6);
/* relative colour syntax */
--hover: hsl(from #64facd 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: #F2FDFA;
  --brand-100: #E4FBF4;
  --brand-200: #C2FAE9;
  --brand-300: #92FBDC;
  --brand-400: #64facd;
  --brand-500: #26F8B9;
  --brand-600: #08EDA8;
  --brand-700: #06C68C;
  --brand-800: #059E70;
  --brand-900: #087252;
  --brand-950: #054733;
  --brand: #64facd;
  --brand-ink: #000000;
  --brand-surface: #F4FAF9;
  --brand-border: #C0EDDF;
  --brand-hover: #41F9C2;
  --brand-pressed: #1FF8B7;
}
@media (prefers-color-scheme: dark) {
  :root {
    --brand-surface: #14241F;
    --brand-ink: #D3EEE6;
  }
}
tailwind.config.jsclick to select
theme: {
  extend: {
    colors: {
      brand: {
        50: '#F2FDFA',
        100: '#E4FBF4',
        200: '#C2FAE9',
        300: '#92FBDC',
        400: '#64facd',
        500: '#26F8B9',
        600: '#08EDA8',
        700: '#06C68C',
        800: '#059E70',
        900: '#087252',
        950: '#054733',
        DEFAULT: '#64facd',
      },
    },
  },
}
scss mapclick to select
$brand: (
  '50': #F2FDFA,
  '100': #E4FBF4,
  '200': #C2FAE9,
  '300': #92FBDC,
  '400': #64facd,
  '500': #26F8B9,
  '600': #08EDA8,
  '700': #06C68C,
  '800': #059E70,
  '900': #087252,
  '950': #054733,
);
$brand-base: #64facd;
$brand-ink: #000000;

@function brand($step) { @return map-get($brand, $step); }
w3c design tokens (json)click to select
{
  "color": {
    "brand": {
      "50": { "$value": "#F2FDFA", "$type": "color" },
      "100": { "$value": "#E4FBF4", "$type": "color" },
      "200": { "$value": "#C2FAE9", "$type": "color" },
      "300": { "$value": "#92FBDC", "$type": "color" },
      "400": { "$value": "#64facd", "$type": "color" },
      "500": { "$value": "#26F8B9", "$type": "color" },
      "600": { "$value": "#08EDA8", "$type": "color" },
      "700": { "$value": "#06C68C", "$type": "color" },
      "800": { "$value": "#059E70", "$type": "color" },
      "900": { "$value": "#087252", "$type": "color" },
      "950": { "$value": "#054733", "$type": "color" }
    },
    "brandInk": { "$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 #64facd · 16.10:1
Use #000000AAA at every size.
Aa
12px
Aa
16px
Aa
24px
Aa
White text · 1.30:1
AA fail · AA large fail · AAA fail
Aa
Black text · 16.10:1 · recommended
AA pass · AA large pass · AAA pass
Reading the other direction: #64facd as text scores 1.30:1 on white and 16.10:1 on black.
Best tinted ink on it, if plain black or white feels flat: #047B58 at 4.05:1.

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
#04835D · 4.76:1
AA on white−42% L
#04835D
The quick fox
#036648 · 7.00:1
AAA on white−48% L
#036648
The quick fox
#64facd · 16.10:1
AA on blackalready passes
#64facd
The quick fox
#64facd · 16.10:1
AAA on blackalready passes
#64facd

Large text — 24px regular or 18.66px bold and above — only needs 3:1, so #05A676 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
#64facd on white: 1.30:1
AA ✗ fail · AA-large · AAA
Aa
#64facd on black: 16.10:1
AA ✓ pass · AA-large · AAA
Against the neutral ladder

Contrast is symmetric, so each row covers both directions: #64facd as text on that neutral, and that neutral as text on #64facd.

NeutralRatioBoth directions
White1.30:1AaAa
Slate 501.25:1AaAa
Slate 1001.19:1AaAa
Slate 2001.06:1AaAa
Slate 3001.14:1AaAa
Slate 4001.97:1AaAa
Slate 5003.65:1AaAa
Slate 6005.81:1AaAa
Slate 7007.94:1AaAa
Slate 80011.21:1AaAa
Slate 90013.68:1AaAa
Black16.10:1AaAa
Colour vision deficiency
true color
protanopia · #F4EBCB
deuteranopia · #DEDBD0
tritanopia · #00FCED

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. #64facd 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.

#F2FDFA
#E4FBF4
#C2FAE9
#92FBDC
#64facd
#26F8B9
#08EDA8
#06C68C
#059E70
#087252
#054733
Base = 400Lightest = 50 · #F2FDFADarkest = 950 · #054733Text 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 0.036 170.0);
  --brand-100: oklch(0.94 0.057 170.0);
  --brand-200: oklch(0.88 0.086 170.0);
  --brand-300: oklch(0.80 0.112 170.0);
  --brand-400: oklch(0.72 0.132 170.0);
  --brand-500: oklch(0.64 0.144 170.0);
  --brand-600: oklch(0.56 0.144 170.0);
  --brand-700: oklch(0.48 0.135 170.0);
  --brand-800: oklch(0.40 0.121 170.0);
  --brand-900: oklch(0.32 0.101 170.0);
  --brand-950: oklch(0.24 0.079 170.0);
}

Colors that work with #64facd

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#F4FAF9
Tinted page background
Border#C0EDDF
Hairlines and dividers
Muted text#4B9B83
Captions on the surface
Accent#C90370
Second voice, not a rival
Dark variant#047B58
Hover, pressed, headers
Light variant#E6FEF7
Selected rows, tints
Dark surface#14241F
Dark-mode background
Hover#41F9C2
One step down in lightness
Pressed#1FF8B7
Two steps down
Disabled#E2ECE9
Chroma pulled out
Focus ring#73FFD5
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 #64facd

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
  • 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 #047B58
Safe as a 1px border on white
No — use #05A676

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 lightness keeps it airy and approachable.

Worth knowing

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

Reads as
  • FormalityLow
  • EnergyHigh
  • Weight31/100
  • 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#FA6491
Analogous left#64FA82
Analogous right#64DCFA
Split-complement 1#FA64DC
Split-complement 2#FA8264
Triadic 1#CD64FA
Triadic 2#FACD64
Tetradic#8264FA
On the wheel
Base+30°−30°+120°+240°+180°162°

#64facd sits at 162°. Every dot is a harmony position and links to its own page in the table alongside.

RGB percentages

Red39.2%
Green98.0%
Blue80.4%
R · 0–255
100
0x64
G · 0–255
250
0xfa
B · 0–255
205
0xcd

CMYK percentages

Cyan60.0%
Magenta0.0%
Yellow18.0%
Key (black)2.0%

Total ink coverage is 80%. Most commercial presses cap around 300% — above that, sheets stop drying properly.

Color previews

#64facd text on a black background

contrast 16.10:1

Card sample

#64facd text on a white background

contrast 1.30:1

Card sample

#64facd on grey

1.19:1

#64facd on its own surface

1.24:1

#64facd on its dark surface

12.36:1

CSS3 live lab

Text font color

The quick brown fox

color: #64facd;
Background color
Panel with #64facd background
background-color: #64facd;
Text shadow — hex

Glowing headline

text-shadow: 2px 2px 8px #64facd;
Text shadow — RGB

Soft neon halo

text-shadow: 0 0 14px rgba(100, 250, 205, 0.45);
Div box shadow
Elevated card
box-shadow: 0 12px 32px -8px rgba(100, 250, 205, 0.45);
Border & gradient
Gradient panel
border: 3px solid #64facd;
background: linear-gradient(135deg, #64facd, #64C3FA);
Gradient text

Gradient headline

background: linear-gradient(90deg, #64facd, #649DFA);
-webkit-background-clip: text;
color: transparent;
Focus ring
Focused control
outline: 2px solid #64facd;
outline-offset: 3px;
Underline & caret

Marked up text

text-decoration-color: #64facd;
caret-color: #64facd;
Left rule
Pull quote or callout
border-left: 4px solid #64facd;
Ring + tint
Selected chip
background: #E6FEF7;
box-shadow: inset 0 0 0 2px #64facd;
Conic badge
68%
background: conic-gradient(#64facd 68%, #e2e8f0 0);

Transparency

What each alpha value actually composites to. The top row is #64facd 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(100, 250, 205, 0.5)
rgb(100 250 205 / 50%)
#64facd80
hsl(162 94% 69% / 50%)
color-mix(in srgb, #64facd 50%, transparent)
Alpha8-digit hexFlat on white
10%#64facd1a#F0FFFA
20%#64facd33#E0FEF5
40%#64facd66#C1FDEB
60%#64facd99#A2FCE1
80%#64facdcc#83FBD7

Gradients from #64facd

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, #9FFCE0, #64facd 45%, #047B58);
Duotone
A short hue run reads richer than a flat fill
background: linear-gradient(120deg, #64facd, #46A9F9);
Complement sweep
Loud — keep it behind large type only
background: linear-gradient(90deg, #64facd, #FA6491);
Spotlight
Hero panels and app headers
background: radial-gradient(120% 120% at 20% 0%, #BDFDEA 0%, #64facd 45%, #047B58 100%);
Soft wash
Section backgrounds that stay readable
background: linear-gradient(180deg, #F4FAF9, #ffffff);
Mesh
Ambient background, no image weight
background: radial-gradient(60% 60% at 15% 20%, #95FCA1 0%, transparent 60%), radial-gradient(55% 55% at 85% 15%, #82D9FB 0%, transparent 60%), radial-gradient(70% 70% at 50% 95%, #047B58 0%, transparent 65%), #64facd;

Monochromatic scale

Palettes built from #64facd

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.

#64facd 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
SurfacesBadgesHighlightsEmpty states
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 16.10:1.

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.

#64facd, answered

What color is #64facd?

#64facd is a light electric cyan, closest to Aqua Marine (ΔE2000 2.2). It sits at 162° on the hue wheel with 94% saturation and 69% lightness, which reads as cool.

What is the RGB value of #64facd?

rgb(100, 250, 205) — 100 red, 250 green and 205 blue out of 255, or 39.2% / 98% / 80.4% by channel.

What is #64facd in HSL and HSV?

hsl(162, 94%, 69%) and hsv(162, 60%, 98%). HSL is what CSS takes; HSV is what your design tool's picker shows, which is why the saturation numbers rarely match.

Is #64facd a light or a dark color?

It is a light color. Relative luminance is 0.7549 and perceived brightness is 83%, so black text on it reaches 16.10:1.

Should I use black or white text on #64facd?

Black. It scores 16.10:1 against #64facd, versus 1.30:1 for white — AAA at any size.

Is #64facd accessible on a white background?

#64facd on white scores 1.30:1, which fails WCAG AA at every size. Darken it to #04835D to reach 4.5:1, or #036648 for 7:1.

What is the complementary color of #64facd?

#FA6491 sits directly opposite on the wheel. Softer options are the split-complements #FA64DC and #FA8264, which give the same contrast with far less vibration.

What colors go well with #64facd?

For interface work: #F4FAF9 as the surface, #C0EDDF for borders, #4B9B83 for secondary text, #C90370 as an accent and #047B58 for hover and pressed states. For a palette, the analogous pair #64FA82 and #64DCFA stays calm, while #FA6491 is the loudest partner.

What is #64facd in CMYK for printing?

cmyk(60%, 0%, 18%, 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 #64facd warm or cool?

Cool — it scores 80 on a scale where 0 is the warmest orange and 100 the coolest azure. Nudged warmer it becomes #64FA96; nudged cooler, #62F1FC.

Which Tailwind color is closest to #64facd?

The emerald family — its 500 step is #10b981, ΔE2000 16.5 away. That is a visible difference, so define #64facd as a custom token rather than reaching for the built-in.

How do I use #64facd in Tailwind CSS?

Inline it as an arbitrary value with bg-[#64facd] or text-[#64facd], 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 #64facd with 50% opacity?

rgba(100, 250, 205, 0.5), or #64facd80 in eight-digit hex. Over white that composites to #B2FDE6; over black, #327D67.

Is #64facd a web-safe color?

No. The nearest web-safe colour is #66FFCC, ΔE2000 1.6 away. The palette only matters for legacy displays and some email clients now.

What does the color #64facd 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 #64facd?

The safest is same-hue elevation: linear-gradient(135deg, #9FFCE0, #64facd 45%, #047B58). For more colour, a short hue run to #46A9F9 keeps it rich without turning muddy.

Work with #64facd in the Color Lab

Every tool opens with this colour already loaded.

Every value on this page is computed from #64facd at request time — conversions, contrast ratios and ΔE distances are calculated, never looked up.