#acefef
a light, vivid cyan · cool · “Pale Turquoise”
At a glance
Every number on this page in one read: what #acefef is made of, how bright it looks, and which way it leans.
Reads cool. Warm and cool siblings keep the same lightness, so you can swap one in without redoing your contrast maths.
Every format
| HEX | #acefef |
| RGB | rgb(172, 239, 239) |
| HSL | hsl(180, 68%, 81%) |
| CMYK | cmyk(28%, 0%, 0%, 6%) |
| LAB | lab(90.2 -20.8 -6.7) |
| LCH | lch(90.2 21.8 198.0) |
| OKLCH | oklch(0.908 0.067 196.0) |
| Decimal | 11333615 |
| Display P3 | color(display-p3 0.675 0.937 0.937) |
Copy-ready code
/* CSS */
color: #acefef;
background-color: #acefef;
/* Tailwind (arbitrary) */
class="text-[#acefef] bg-[#acefef]"
/* SCSS */
$brand: #acefef;
/* SwiftUI */
Color(red: 0.675, green: 0.937, blue: 0.937)
/* Android */
Color.parseColor("#acefef")
/* Flutter */
Color(0xFFACEFEF)
/* Python / OpenCV (BGR) */
(239, 239, 172)Best text color
Only one of black and white can be right. This is the one, with the number that proves it.
Accessibility — WCAG contrast
Color scale — 50 to 950
A Tailwind-shaped ramp built around this exact hex. #acefef is pinned to step 300; the rest hold its hue and let saturation ease off at the extremes so the pale end never turns neon.
:root {
--brand-50: #F3FBFB;
--brand-100: #E8F8F8;
--brand-200: #CAF2F2;
--brand-300: #acefef;
--brand-400: #72E4E4;
--brand-500: #43DBDB;
--brand-600: #28CDCD;
--brand-700: #21ABAB;
--brand-800: #1A8989;
--brand-900: #176363;
--brand-950: #0E3E3E;
--brand: #acefef;
--brand-ink: #000000;
}Colors that work with #acefef
Not a palette — a role sheet. Each swatch answers one question you will hit while building the component.
Surface, border, heading and body all derive from this one hue, so the screen stays coherent without a second palette.
Lightness flips, hue holds. The accent stays the anchor in both themes.
How to use #acefef
Derived from its contrast, chroma and lightness — not from taste.
- ✓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
- ⚠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
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 | #EFACAC | Directly opposite — maximum tension | |
| Analogous left | #ACEFCE | Neighbour, quieter | |
| Analogous right | #ACCEEF | Neighbour, quieter | |
| Split-complement 1 | #EFACCE | Contrast without the clash | |
| Split-complement 2 | #EFCEAC | Contrast without the clash | |
| Triadic 1 | #EFACEF | Even thirds — balanced and loud | |
| Triadic 2 | #EFEFAC | Even thirds — balanced and loud | |
| Tetradic | #CEACEF | Fourth corner of the square scheme |
RGB percentages
CMYK percentages
Color previews
#acefef text on a black background
contrast 16.35:1
#acefef text on a white background
contrast 1.28:1
CSS3 live lab
The quick brown fox
color: #acefef;
background-color: #acefef;
Glowing headline
text-shadow: 2px 2px 8px #acefef;
Soft neon halo
text-shadow: 0 0 14px rgba(172, 239, 239, 0.45);
box-shadow: 0 12px 32px -8px rgba(172, 239, 239, 0.45);
border: 3px solid #acefef; background: linear-gradient(135deg, #acefef, #ACC2EF);
Monochromatic scale
Palettes built from #acefef
Shades — darker
Tints — lighter
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.
Closest color with a full write-up: Powder Blue (#b0e0e6) — ΔE2000 5.4 away, with its history, psychology and brand usage.
#acefef in the real world
Where a color in this family tends to land, and the interface roles it is usually asked to play.
Converts to four-color process without much drama. Proof it anyway.
#acefef, answered
What color is #acefef?
#acefef is a light vivid cyan — the CSS keyword Pale Turquoise. It sits at 180° on the hue wheel with 68% saturation and 81% lightness, which reads as cool.
What is the RGB value of #acefef?
rgb(172, 239, 239) — 172 red, 239 green and 239 blue out of 255, or 67.5% / 93.7% / 93.7% by channel.
Is #acefef a light or a dark color?
It is a light color. Relative luminance is 0.7674 and perceived brightness is 87%, so black text on it reaches 16.35:1.
Should I use black or white text on #acefef?
Black. It scores 16.35:1 against #acefef, versus 1.28:1 for white — AAA at any size.
What is the complementary color of #acefef?
#EFACAC sits directly opposite on the wheel. Softer options are the split-complements #EFACCE and #EFCEAC, which give the same contrast with far less vibration.
What colors go well with #acefef?
For interface work: #F4FAFA as the surface, #C0EDED for borders, #4B9B9B for secondary text, #AF1D42 as an accent and #156B6B for hover and pressed states. For a palette, the analogous pair #ACEFCE and #ACCEEF stays calm, while #EFACAC is the loudest partner.
What is #acefef in CMYK for printing?
cmyk(28%, 0%, 0%, 6%). This is a screen-to-ink approximation — ask your printer for a proof before committing to a run.
Is #acefef 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 #ACEFD6; nudged cooler, #ABD7F0.