#ac020e
a dark, electric red · warm · closest name: Firebrick
At a glance
Every number on this page in one read: what #ac020e is made of, how bright it looks, and which way it leans.
Reads warm. Warm and cool siblings keep the same lightness, so you can swap one in without redoing your contrast maths.
Every format
| HEX | #ac020e |
| RGB | rgb(172, 2, 14) |
| HSL | hsl(356, 98%, 34%) |
| CMYK | cmyk(0%, 99%, 92%, 33%) |
| LAB | lab(35.7 59.5 44.3) |
| LCH | lch(35.7 74.2 36.7) |
| OKLCH | oklch(0.469 0.190 27.5) |
| Decimal | 11272718 |
| Display P3 | color(display-p3 0.675 0.008 0.055) |
Copy-ready code
/* CSS */
color: #ac020e;
background-color: #ac020e;
/* Tailwind (arbitrary) */
class="text-[#ac020e] bg-[#ac020e]"
/* SCSS */
$brand: #ac020e;
/* SwiftUI */
Color(red: 0.675, green: 0.008, blue: 0.055)
/* Android */
Color.parseColor("#ac020e")
/* Flutter */
Color(0xFFAC020E)
/* Python / OpenCV (BGR) */
(14, 2, 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. #ac020e is pinned to step 800; the rest hold its hue and let saturation ease off at the extremes so the pale end never turns neon.
:root {
--brand-50: #FDF1F2;
--brand-100: #FCE4E5;
--brand-200: #FBC1C5;
--brand-300: #FE9098;
--brand-400: #FD5964;
--brand-500: #FC2131;
--brand-600: #F20314;
--brand-700: #CA0210;
--brand-800: #ac020e;
--brand-900: #74060E;
--brand-950: #490409;
--brand: #ac020e;
--brand-ink: #ffffff;
}Colors that work with #ac020e
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 #ac020e
Derived from its contrast, chroma and lightness — not from taste.
- ✓Body text and links on white
- ✓Primary buttons and calls to action
- ✓Focus rings, active and selected states
- ✓Headers, footers and dark-mode surfaces
- ✓Brand accents, badges and data highlights
- ⚠Text on black or near-black surfaces
- ⚠Full-page backgrounds — tiring over long sessions
- ⚠Black text placed on it
- ⚠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 | #02ACA0 | Directly opposite — maximum tension | |
| Analogous left | #AC0263 | Neighbour, quieter | |
| Analogous right | #AC4B02 | Neighbour, quieter | |
| Split-complement 1 | #02AC4B | Contrast without the clash | |
| Split-complement 2 | #0263AC | Contrast without the clash | |
| Triadic 1 | #0EAC02 | Even thirds — balanced and loud | |
| Triadic 2 | #020EAC | Even thirds — balanced and loud | |
| Tetradic | #63AC02 | Fourth corner of the square scheme |
RGB percentages
CMYK percentages
Color previews
#ac020e text on a black background
contrast 2.77:1
#ac020e text on a white background
contrast 7.58:1
CSS3 live lab
The quick brown fox
color: #ac020e;
background-color: #ac020e;
Glowing headline
text-shadow: 2px 2px 8px #ac020e;
Soft neon halo
text-shadow: 0 0 14px rgba(172, 2, 14, 0.45);
box-shadow: 0 12px 32px -8px rgba(172, 2, 14, 0.45);
border: 3px solid #ac020e; background: linear-gradient(135deg, #ac020e, #AC6702);
Monochromatic scale
Palettes built from #ac020e
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: Sangria (#92000a) — ΔE2000 5.2 away, with its history, psychology and brand usage.
#ac020e in the real world
Where a color in this family tends to land, and the interface roles it is usually asked to play.
Sits outside most CMYK gamuts — expect a duller press result, or specify a spot ink.
#ac020e, answered
What color is #ac020e?
#ac020e is a dark electric red, closest to Firebrick (ΔE2000 3.8). It sits at 356° on the hue wheel with 98% saturation and 34% lightness, which reads as warm.
What is the RGB value of #ac020e?
rgb(172, 2, 14) — 172 red, 2 green and 14 blue out of 255, or 67.5% / 0.8% / 5.5% by channel.
Is #ac020e a light or a dark color?
It is a dark color. Relative luminance is 0.0885 and perceived brightness is 37%, so white text on it reaches 7.58:1.
Should I use black or white text on #ac020e?
White. It scores 7.58:1 against #ac020e, versus 2.77:1 for black — AAA at any size.
What is the complementary color of #ac020e?
#02ACA0 sits directly opposite on the wheel. Softer options are the split-complements #02AC4B and #0263AC, which give the same contrast with far less vibration.
What colors go well with #ac020e?
For interface work: #FAF4F5 as the surface, #EDC0C3 for borders, #9B4B50 for secondary text, #00CC8A as an accent and #7E010A for hover and pressed states. For a palette, the analogous pair #AC0263 and #AC4B02 stays calm, while #02ACA0 is the loudest partner.
What is #ac020e in CMYK for printing?
cmyk(0%, 99%, 92%, 33%). 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 #ac020e warm or cool?
Warm — it scores 19 on a scale where 0 is the warmest orange and 100 the coolest azure. Nudged warmer it becomes #AC2802; nudged cooler, #AE004C.