#AA1D2B
Closest named color: Brown (#A52A2A). oklch(47.9% 0.175 22.6), rgb(170, 29, 43).
Aa
White text reads best on this color (7.19:1).
About this color
#AA1D2B is a medium-dark, vivid red. In OKLCH its lightness is 48%, its chroma 0.175 and its hue 23°. Its hue sits on the warm side of the wheel. The nearest named color is Brown (#A52A2A), ΔE 0.017 away. White text reads best on it, at 7.19:1.
| Hue family | Reds |
| Lightness | medium-dark (48%) |
| Chroma | vivid (0.175) |
| Temperature | warm |
| Nearest name | Brown (#A52A2A) |
| Black text | 2.91:1 |
| White text | 7.19:1 |
Values
| HEX | #AA1D2B |
| RGB | rgb(170, 29, 43) |
| HSL | hsl(354, 71%, 39%) |
| OKLCH | oklch(47.9% 0.175 22.6) |
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 #AA1D2B | 7.19:1 | AAA | Lc -88.3 | Fine for body text |
| Black text on #AA1D2B | 2.91:1 | Fails | Lc 20.8 | Dividers and decoration only |
| #AA1D2B text on white | 7.19:1 | AAA | Lc 83.3 | Fine for body text |
| #AA1D2B text on black | 2.91:1 | Fails | Lc -18.7 | 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
#FAE4E2
oklch(93.6% 0.024 23.9)
-
Step 200
200
#F7CECB
oklch(88.6% 0.047 23)
-
Step 300
300
#F3ABA8
oklch(80.9% 0.085 21.8)
-
Step 400
400
#E97C79
oklch(70.8% 0.135 22.7)
-
Step 500
500
#DE5557
oklch(63.1% 0.172 22.6)
-
Step 600
600
#CA323C
oklch(55.6% 0.188 22.6)
-
Step 700
700 (this color)
#AA1D2B
oklch(47.9% 0.175 22.6)
-
Step 800
800
#8D2027
oklch(42.7% 0.144 22.7)
-
Step 900
900
#722224
oklch(37.8% 0.113 22.9)
-
Step 950
950
#431516
oklch(27% 0.071 21.9)
#AA1D2B 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) | #4A442A | 0.193 |
| Deuteranopia (no green cones) | #6D6226 | 0.175 |
| Tritanopia (no blue cones) | #BB0024 | 0.034 |
| Achromatopsia (no color) | #575757 | 0.176 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #AA1D2B
#AA1D2B
oklch(47.9% 0.175 22.6)
- #006B71
#006B71
oklch(48% 0.082 201.6)
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 #AA1D2B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Brown #A52A2A ΔE 0.017
- Firebrick #B22222 ΔE 0.022
- Rouge #AB1239 ΔE 0.023
- Rufous #AE2012 ΔE 0.025
- Auburn #9B2226 ΔE 0.031
- Rust Red #AA2704 ΔE 0.035
- Burnt Red #9F2305 ΔE 0.039
- Scarlet #BE0119 ΔE 0.041
Use #AA1D2B 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.