#A9040E
Closest named color: Rufous (#AE2012). oklch(46.3% 0.187 27.6), rgb(169, 4, 14).
Aa
White text reads best on this color (7.74:1).
About this color
#A9040E is a medium-dark, vivid red. In OKLCH its lightness is 46%, its chroma 0.187 and its hue 28°. Its hue sits on the warm side of the wheel. The nearest named color is Rufous (#AE2012), ΔE 0.026 away. White text reads best on it, at 7.74:1.
| Hue family | Reds |
| Lightness | medium-dark (46%) |
| Chroma | vivid (0.187) |
| Temperature | warm |
| Nearest name | Rufous (#AE2012) |
| Black text | 2.71:1 |
| White text | 7.74:1 |
Values
| HEX | #A9040E |
| RGB | rgb(169, 4, 14) |
| HSL | hsl(356, 95%, 34%) |
| OKLCH | oklch(46.3% 0.187 27.6) |
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 #A9040E | 7.74:1 | AAA | Lc -89.3 | Fine for body text |
| Black text on #A9040E | 2.71:1 | Fails | Lc 19.6 | Dividers and decoration only |
| #A9040E text on white | 7.74:1 | AAA | Lc 84.4 | Fine for body text |
| #A9040E text on black | 2.71:1 | Fails | Lc -17.6 | 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
#F6AAA0
oklch(80.8% 0.091 27.6)
-
Step 400
400
#ED796D
oklch(70.6% 0.145 27.4)
-
Step 500
500
#E45046
oklch(63.2% 0.186 27.5)
-
Step 600
600
#CF2A26
oklch(55.6% 0.201 27.7)
-
Step 700
700 (this color)
#A9040E
oklch(46.3% 0.187 27.6)
-
Step 800
800
#911A17
oklch(42.7% 0.155 27.8)
-
Step 900
900
#751E1A
oklch(37.7% 0.122 27.3)
-
Step 950
950
#451410
oklch(27.1% 0.076 27.9)
#A9040E 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) | #463D0A | 0.206 |
| Deuteranopia (no green cones) | #6B5E00 | 0.184 |
| Tritanopia (no blue cones) | #BB000D | 0.038 |
| Achromatopsia (no color) | #535353 | 0.188 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #A9040E
#A9040E
oklch(46.3% 0.187 27.6)
- #006570
#006570
oklch(46.3% 0.08 207.8)
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 #A9040E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rufous #AE2012 ΔE 0.026
- Carmine #9D0216 ΔE 0.027
- Burnt Red #9F2305 ΔE 0.030
- Rust Red #AA2704 ΔE 0.033
- Auburn #9B2226 ΔE 0.033
- Brown #A52A2A ΔE 0.033
- Deep Red #9A0200 ΔE 0.034
- Firebrick #B22222 ΔE 0.034
Use #A9040E 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.