#AA1F21
Closest named color: Rufous (#AE2012). oklch(48% 0.174 26.3), rgb(170, 31, 33).
Aa
White text reads best on this color (7.17:1).
About this color
#AA1F21 is a medium-dark, vivid red. In OKLCH its lightness is 48%, its chroma 0.174 and its hue 26°. 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 7.17:1.
| Hue family | Reds |
| Lightness | medium-dark (48%) |
| Chroma | vivid (0.174) |
| Temperature | warm |
| Nearest name | Rufous (#AE2012) |
| Black text | 2.92:1 |
| White text | 7.17:1 |
Values
| HEX | #AA1F21 |
| RGB | rgb(170, 31, 33) |
| HSL | hsl(359, 69%, 39%) |
| OKLCH | oklch(48% 0.174 26.3) |
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 #AA1F21 | 7.17:1 | AAA | Lc -88.3 | Fine for body text |
| Black text on #AA1F21 | 2.92:1 | Fails | Lc 20.8 | Dividers and decoration only |
| #AA1F21 text on white | 7.17:1 | AAA | Lc 83.2 | Fine for body text |
| #AA1F21 text on black | 2.92:1 | 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
#FDF3F1
oklch(97.1% 0.011 31.1)
-
Step 100
100
#FAE4E1
oklch(93.6% 0.025 26.9)
-
Step 200
200
#F7CEC9
oklch(88.5% 0.047 26.2)
-
Step 300
300
#F2ACA4
oklch(80.9% 0.084 26.4)
-
Step 400
400
#E97D73
oklch(70.8% 0.135 26.5)
-
Step 500
500
#DE564E
oklch(63.1% 0.172 26.5)
-
Step 600
600
#CA3432
oklch(55.7% 0.187 26.3)
-
Step 700
700 (this color)
#AA1F21
oklch(48% 0.174 26.3)
-
Step 800
800
#8D2120
oklch(42.7% 0.144 26.2)
-
Step 900
900
#72221F
oklch(37.7% 0.113 26.2)
-
Step 950
950
#431513
oklch(26.9% 0.072 25.6)
#AA1F21 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) | #4C441F | 0.190 |
| Deuteranopia (no green cones) | #6E621A | 0.172 |
| Tritanopia (no blue cones) | #BC0022 | 0.037 |
| Achromatopsia (no color) | #575757 | 0.176 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #AA1F21
#AA1F21
oklch(48% 0.174 26.3)
- #006A74
#006A74
oklch(47.9% 0.082 206.2)
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 #AA1F21, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rufous #AE2012 ΔE 0.015
- Brown #A52A2A ΔE 0.015
- Firebrick #B22222 ΔE 0.018
- Rust Red #AA2704 ΔE 0.023
- Burnt Red #9F2305 ΔE 0.030
- Auburn #9B2226 ΔE 0.031
- Rusty Red #AF2F0D ΔE 0.033
- Rouge #AB1239 ΔE 0.034
Use #AA1F21 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.