#AA1800
Closest named color: Rufous (#AE2012). oklch(47.3% 0.181 31.5), rgb(170, 24, 0).
Aa
White text reads best on this color (7.39:1).
About this color
#AA1800 is a medium-dark, vivid red. In OKLCH its lightness is 47%, its chroma 0.181 and its hue 32°. Its hue sits on the warm side of the wheel. The nearest named color is Rufous (#AE2012), ΔE 0.015 away. White text reads best on it, at 7.39:1.
| Hue family | Reds |
| Lightness | medium-dark (47%) |
| Chroma | vivid (0.181) |
| Temperature | warm |
| Nearest name | Rufous (#AE2012) |
| Black text | 2.83:1 |
| White text | 7.39:1 |
Values
| HEX | #AA1800 |
| RGB | rgb(170, 24, 0) |
| HSL | hsl(8, 100%, 33%) |
| OKLCH | oklch(47.3% 0.181 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 #AA1800 | 7.39:1 | AAA | Lc -88.7 | Fine for body text |
| Black text on #AA1800 | 2.83:1 | Fails | Lc 20.3 | Dividers and decoration only |
| #AA1800 text on white | 7.39:1 | AAA | Lc 83.7 | Fine for body text |
| #AA1800 text on black | 2.83:1 | Fails | Lc -18.2 | 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
#FAE4E0
oklch(93.6% 0.025 29.9)
-
Step 200
200
#F8CEC6
oklch(88.5% 0.049 30.7)
-
Step 300
300
#F4AC9E
oklch(80.9% 0.088 31.3)
-
Step 400
400
#EB7C68
oklch(70.7% 0.141 31.5)
-
Step 500
500
#E1543E
oklch(63% 0.18 31.4)
-
Step 600
600
#CC311A
oklch(55.5% 0.195 31.5)
-
Step 700
700 (this color)
#AA1800
oklch(47.3% 0.181 31.5)
-
Step 800
800
#8F1F0E
oklch(42.7% 0.15 31.6)
-
Step 900
900
#732115
oklch(37.7% 0.117 31.2)
-
Step 950
950
#44150D
oklch(27% 0.075 31.9)
#AA1800 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) | #4B4100 | 0.195 |
| Deuteranopia (no green cones) | #6E6100 | 0.174 |
| Tritanopia (no blue cones) | #BC0016 | 0.039 |
| Achromatopsia (no color) | #565656 | 0.183 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #AA1800
#AA1800
oklch(47.3% 0.181 31.5)
- #006776
#006776
oklch(47.2% 0.082 212)
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 #AA1800, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rufous #AE2012 ΔE 0.015
- Rust Red #AA2704 ΔE 0.016
- Burnt Red #9F2305 ΔE 0.023
- Firebrick #B22222 ΔE 0.028
- Brown #A52A2A ΔE 0.029
- Rusty Red #AF2F0D ΔE 0.032
- Auburn #9B2226 ΔE 0.037
- Brick #A03623 ΔE 0.039
Use #AA1800 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.