#AD040C
Closest named color: Rufous (#AE2012). oklch(47.1% 0.191 28), rgb(173, 4, 12).
Aa
White text reads best on this color (7.50:1).
About this color
#AD040C is a medium-dark, vivid red. In OKLCH its lightness is 47%, its chroma 0.191 and its hue 28°. Its hue sits on the warm side of the wheel. The nearest named color is Rufous (#AE2012), ΔE 0.021 away. White text reads best on it, at 7.50:1.
| Hue family | Reds |
| Lightness | medium-dark (47%) |
| Chroma | vivid (0.191) |
| Temperature | warm |
| Nearest name | Rufous (#AE2012) |
| Black text | 2.79:1 |
| White text | 7.50:1 |
Values
| HEX | #AD040C |
| RGB | rgb(173, 4, 12) |
| HSL | hsl(357, 95%, 35%) |
| OKLCH | oklch(47.1% 0.191 28) |
Contrast
WCAG 2 contrast ratios are the conformance target: AA needs 4.5:1 for body text and 3:1 for large text, AAA needs 7:1. APCA Lc values are supplementary guidance from the WCAG 3 drafts.
| Pair | WCAG 2 | Result | APCA | APCA guidance |
|---|---|---|---|---|
| White text on #AD040C | 7.50:1 | AAA | Lc -88.5 | Fine for body text |
| Black text on #AD040C | 2.79:1 | Fails | Lc 20.5 | Dividers and decoration only |
| #AD040C text on white | 7.50:1 | AAA | Lc 83.5 | Fine for body text |
| #AD040C text on black | 2.79:1 | Fails | Lc -18.4 | Dividers and decoration only |
Tints and shades
A 50–950 scale built in OKLCH: the hue is held, lightness follows a Tailwind v4-like curve, and every step is kept inside the sRGB gamut. This color sits at step 700.
-
Step 50
50
#FEF3F1
oklch(97.2% 0.012 29.9)
-
Step 100
100
#FBE4E0
oklch(93.6% 0.026 29.4)
-
Step 200
200
#F9CDC7
oklch(88.5% 0.051 27.2)
-
Step 300
300
#F7AA9F
oklch(80.9% 0.093 28.3)
-
Step 400
400
#EE796B
oklch(70.7% 0.147 28.4)
-
Step 500
500
#E54E43
oklch(63.1% 0.189 27.9)
-
Step 600
600
#D02622
oklch(55.5% 0.205 28)
-
Step 700
700 (this color)
#AD040C
oklch(47.1% 0.191 28)
-
Step 800
800
#921715
oklch(42.7% 0.158 27.8)
-
Step 900
900
#751D18
oklch(37.6% 0.123 27.9)
-
Step 950
950
#45130F
oklch(26.9% 0.078 28)
#AD040C with color blindness
Simulated with the Machado et al. (2009) model. ΔE is how far the color moves: below about 0.02 you would not notice a change.
| Vision | Seen as | Shift (ΔE) |
|---|---|---|
| Protanopia (no red cones) | #483F07 | 0.209 |
| Deuteranopia (no green cones) | #6D6000 | 0.187 |
| Tritanopia (no blue cones) | #BF000D | 0.038 |
| Achromatopsia (no color) | #555555 | 0.192 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #AD040C
#AD040C
oklch(47.1% 0.191 28)
- #006773
#006773
oklch(47% 0.081 208.7)
Analogous
Neighbouring hues, 30° either side.
Split complementary
The two hues beside the complement (150° and 210°).
Triadic
Three hues spaced 120° apart.
Palettes with this color
Curated palettes that contain a color within ΔE 0.04 (OKLab) of #AD040C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rufous #AE2012 ΔE 0.021
- Firebrick #B22222 ΔE 0.028
- Rust Red #AA2704 ΔE 0.030
- Brown #A52A2A ΔE 0.033
- Burnt Red #9F2305 ΔE 0.034
- Carmine #9D0216 ΔE 0.036
- Scarlet #BE0119 ΔE 0.037
- Auburn #9B2226 ΔE 0.039
Use #AD040C in your product
Turn it into light and dark UI roles checked for contrast, then export to Tailwind v4, shadcn/ui, CSS or design tokens.