#AA0218
Closest named color: Rufous (#AE2012). oklch(46.5% 0.188 25.4), rgb(170, 2, 24).
Aa
White text reads best on this color (7.68:1).
About this color
#AA0218 is a medium-dark, vivid red. In OKLCH its lightness is 47%, its chroma 0.188 and its hue 25°. Its hue sits on the warm side of the wheel. The nearest named color is Rufous (#AE2012), ΔE 0.027 away. White text reads best on it, at 7.68:1.
| Hue family | Reds |
| Lightness | medium-dark (47%) |
| Chroma | vivid (0.188) |
| Temperature | warm |
| Nearest name | Rufous (#AE2012) |
| Black text | 2.73:1 |
| White text | 7.68:1 |
Values
| HEX | #AA0218 |
| RGB | rgb(170, 2, 24) |
| HSL | hsl(352, 98%, 34%) |
| OKLCH | oklch(46.5% 0.188 25.4) |
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 #AA0218 | 7.68:1 | AAA | Lc -89.1 | Fine for body text |
| Black text on #AA0218 | 2.73:1 | Fails | Lc 19.9 | Dividers and decoration only |
| #AA0218 text on white | 7.68:1 | AAA | Lc 84.2 | Fine for body text |
| #AA0218 text on black | 2.73:1 | Fails | Lc -17.8 | 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
#FEF3F1
oklch(97.2% 0.012 29.9)
-
Step 100
100
#FBE4E1
oklch(93.7% 0.026 26.5)
-
Step 200
200
#F9CDC8
oklch(88.5% 0.05 25.7)
-
Step 300
300
#F6AAA3
oklch(80.9% 0.091 25.1)
-
Step 400
400
#ED7971
oklch(70.7% 0.144 25.4)
-
Step 500
500
#E44F4B
oklch(63.1% 0.186 25.5)
-
Step 600
600
#CF282E
oklch(55.6% 0.201 25.4)
-
Step 700
700 (this color)
#AA0218
oklch(46.5% 0.188 25.4)
-
Step 800
800
#91181D
oklch(42.6% 0.155 25.3)
-
Step 900
900
#751E1D
oklch(37.8% 0.121 25.7)
-
Step 950
950
#451312
oklch(27% 0.077 24.9)
#AA0218 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) | #453D16 | 0.208 |
| Deuteranopia (no green cones) | #6B5F0D | 0.188 |
| Tritanopia (no blue cones) | #BC0010 | 0.039 |
| Achromatopsia (no color) | #535353 | 0.189 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #AA0218
#AA0218
oklch(46.5% 0.188 25.4)
- #00666F
#00666F
oklch(46.6% 0.08 205.4)
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 #AA0218, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rufous #AE2012 ΔE 0.027
- Carmine #9D0216 ΔE 0.028
- Brown #A52A2A ΔE 0.032
- Firebrick #B22222 ΔE 0.033
- Auburn #9B2226 ΔE 0.033
- Rouge #AB1239 ΔE 0.035
- Burnt Red #9F2305 ΔE 0.035
- Rust Red #AA2704 ΔE 0.036
Use #AA0218 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.