#AA2B18
Closest named color: Rust Red (#AA2704). oklch(48.9% 0.166 31.5), rgb(170, 43, 24).
Aa
White text reads best on this color (6.84:1).
About this color
#AA2B18 is a medium-dark, vivid red. In OKLCH its lightness is 49%, its chroma 0.166 and its hue 32°. Its hue sits on the warm side of the wheel. The nearest named color is Rust Red (#AA2704), ΔE 0.010 away. White text reads best on it, at 6.84:1.
| Hue family | Reds |
| Lightness | medium-dark (49%) |
| Chroma | vivid (0.166) |
| Temperature | warm |
| Nearest name | Rust Red (#AA2704) |
| Black text | 3.06:1 |
| White text | 6.84:1 |
Values
| HEX | #AA2B18 |
| RGB | rgb(170, 43, 24) |
| HSL | hsl(8, 75%, 38%) |
| OKLCH | oklch(48.9% 0.166 31.5) |
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 #AA2B18 | 6.84:1 | AA | Lc -87.4 | Fine for body text |
| Black text on #AA2B18 | 3.06:1 | AA large text | Lc 21.7 | Dividers and decoration only |
| #AA2B18 text on white | 6.84:1 | AA | Lc 82.3 | Fine for body text |
| #AA2B18 text on black | 3.06:1 | AA large text | Lc -19.6 | 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
#FDF3F1
oklch(97.1% 0.011 31.1)
-
Step 100
100
#F9E5E0
oklch(93.7% 0.023 34.3)
-
Step 200
200
#F5CFC7
oklch(88.5% 0.044 31.9)
-
Step 300
300
#F0AEA1
oklch(80.9% 0.08 31.4)
-
Step 400
400
#E5806D
oklch(70.6% 0.129 31.7)
-
Step 500
500
#DB5B46
oklch(63.1% 0.165 31.4)
-
Step 600
600
#C63B26
oklch(55.5% 0.179 31.5)
-
Step 700
700 (this color)
#AA2B18
oklch(48.9% 0.166 31.5)
-
Step 800
800
#8B2717
oklch(42.8% 0.138 31.8)
-
Step 900
900
#70261A
oklch(37.8% 0.108 31.6)
-
Step 950
950
#421710
oklch(27% 0.069 31.3)
#AA2B18 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) | #524914 | 0.177 |
| Deuteranopia (no green cones) | #716510 | 0.161 |
| Tritanopia (no blue cones) | #BC0028 | 0.049 |
| Achromatopsia (no color) | #5A5A5A | 0.168 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #AA2B18
#AA2B18
oklch(48.9% 0.166 31.5)
- #006C7C
#006C7C
oklch(48.8% 0.085 212.4)
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 #AA2B18, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rust Red #AA2704 ΔE 0.010
- Rufous #AE2012 ΔE 0.013
- Rusty Red #AF2F0D ΔE 0.015
- Brown #A52A2A ΔE 0.020
- Firebrick #B22222 ΔE 0.021
- Brick #A03623 ΔE 0.023
- Burnt Red #9F2305 ΔE 0.029
- Russet #A13905 ΔE 0.031
Use #AA2B18 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.