#AA1B27
Closest named color: Brown (#A52A2A). oklch(47.8% 0.176 23.7), rgb(170, 27, 39).
Aa
White text reads best on this color (7.25:1).
About this color
#AA1B27 is a medium-dark, vivid red. In OKLCH its lightness is 48%, its chroma 0.176 and its hue 24°. Its hue sits on the warm side of the wheel. The nearest named color is Brown (#A52A2A), ΔE 0.018 away. White text reads best on it, at 7.25:1.
| Hue family | Reds |
| Lightness | medium-dark (48%) |
| Chroma | vivid (0.176) |
| Temperature | warm |
| Nearest name | Brown (#A52A2A) |
| Black text | 2.89:1 |
| White text | 7.25:1 |
Values
| HEX | #AA1B27 |
| RGB | rgb(170, 27, 39) |
| HSL | hsl(355, 73%, 39%) |
| OKLCH | oklch(47.8% 0.176 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 #AA1B27 | 7.25:1 | AAA | Lc -88.4 | Fine for body text |
| Black text on #AA1B27 | 2.89:1 | Fails | Lc 20.6 | Dividers and decoration only |
| #AA1B27 text on white | 7.25:1 | AAA | Lc 83.4 | Fine for body text |
| #AA1B27 text on black | 2.89:1 | Fails | Lc -18.5 | 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
#F7CECA
oklch(88.5% 0.047 24.6)
-
Step 300
300
#F3ABA6
oklch(80.8% 0.086 23.6)
-
Step 400
400
#E97B77
oklch(70.6% 0.137 23.3)
-
Step 500
500
#DF5454
oklch(63.1% 0.174 23.5)
-
Step 600
600
#CB3138
oklch(55.7% 0.19 23.8)
-
Step 700
700 (this color)
#AA1B27
oklch(47.8% 0.176 23.7)
-
Step 800
800
#8E1F24
oklch(42.7% 0.146 23.9)
-
Step 900
900
#722122
oklch(37.7% 0.114 23.8)
-
Step 950
950
#431515
oklch(27% 0.072 23.2)
#AA1B27 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) | #4A4326 | 0.193 |
| Deuteranopia (no green cones) | #6D6221 | 0.177 |
| Tritanopia (no blue cones) | #BC0022 | 0.036 |
| Achromatopsia (no color) | #575757 | 0.177 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #AA1B27
#AA1B27
oklch(47.8% 0.176 23.7)
- #006A72
#006A72
oklch(47.8% 0.081 203.9)
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 #AA1B27, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Brown #A52A2A ΔE 0.018
- Firebrick #B22222 ΔE 0.022
- Rufous #AE2012 ΔE 0.022
- Rouge #AB1239 ΔE 0.026
- Auburn #9B2226 ΔE 0.030
- Rust Red #AA2704 ΔE 0.032
- Burnt Red #9F2305 ΔE 0.036
- Carmine #9D0216 ΔE 0.039
Use #AA1B27 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.