#AA0B21
Closest named color: Rouge (#AB1239). oklch(46.9% 0.184 23.7), rgb(170, 11, 33).
Aa
White text reads best on this color (7.55:1).
About this color
#AA0B21 is a medium-dark, vivid red. In OKLCH its lightness is 47%, its chroma 0.184 and its hue 24°. Its hue sits on the warm side of the wheel. The nearest named color is Rouge (#AB1239), ΔE 0.027 away. White text reads best on it, at 7.55:1.
| Hue family | Reds |
| Lightness | medium-dark (47%) |
| Chroma | vivid (0.184) |
| Temperature | warm |
| Nearest name | Rouge (#AB1239) |
| Black text | 2.77:1 |
| White text | 7.55:1 |
Values
| HEX | #AA0B21 |
| RGB | rgb(170, 11, 33) |
| HSL | hsl(352, 88%, 35%) |
| OKLCH | oklch(46.9% 0.184 23.7) |
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 #AA0B21 | 7.55:1 | AAA | Lc -89.0 | Fine for body text |
| Black text on #AA0B21 | 2.77:1 | Fails | Lc 20.0 | Dividers and decoration only |
| #AA0B21 text on white | 7.55:1 | AAA | Lc 84.0 | Fine for body text |
| #AA0B21 text on black | 2.77:1 | Fails | Lc -17.9 | 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
#FDF3F2
oklch(97.2% 0.011 24.3)
-
Step 100
100
#FBE4E2
oklch(93.7% 0.025 23.6)
-
Step 200
200
#F9CDC9
oklch(88.5% 0.05 24.2)
-
Step 300
300
#F5AAA5
oklch(80.9% 0.089 23.5)
-
Step 400
400
#EC7975
oklch(70.6% 0.143 23.4)
-
Step 500
500
#E35051
oklch(63.2% 0.183 23.6)
-
Step 600
600
#CE2A35
oklch(55.6% 0.198 23.6)
-
Step 700
700 (this color)
#AA0B21
oklch(46.9% 0.184 23.7)
-
Step 800
800
#901A22
oklch(42.7% 0.152 23.6)
-
Step 900
900
#741E21
oklch(37.7% 0.12 23.2)
-
Step 950
950
#441414
oklch(27% 0.074 23.5)
#AA0B21 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) | #463F20 | 0.204 |
| Deuteranopia (no green cones) | #6B5F1A | 0.184 |
| Tritanopia (no blue cones) | #BC0017 | 0.038 |
| Achromatopsia (no color) | #545454 | 0.186 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #AA0B21
#AA0B21
oklch(46.9% 0.184 23.7)
- #00676F
#00676F
oklch(46.8% 0.08 204.1)
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 #AA0B21, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rouge #AB1239 ΔE 0.027
- Rufous #AE2012 ΔE 0.027
- Brown #A52A2A ΔE 0.028
- Firebrick #B22222 ΔE 0.030
- Carmine #9D0216 ΔE 0.031
- Auburn #9B2226 ΔE 0.031
- Burnt Red #9F2305 ΔE 0.037
- Rust Red #AA2704 ΔE 0.037
Use #AA0B21 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.