#AA3133
Closest named color: Brown (#A52A2A). oklch(49.8% 0.157 24.1), rgb(170, 49, 51).
Aa
White text reads best on this color (6.57:1).
About this color
#AA3133 is a medium-dark, vivid red. In OKLCH its lightness is 50%, its chroma 0.157 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 6.57:1.
| Hue family | Reds |
| Lightness | medium-dark (50%) |
| Chroma | vivid (0.157) |
| Temperature | warm |
| Nearest name | Brown (#A52A2A) |
| Black text | 3.19:1 |
| White text | 6.57:1 |
Values
| HEX | #AA3133 |
| RGB | rgb(170, 49, 51) |
| HSL | hsl(359, 55%, 43%) |
| OKLCH | oklch(49.8% 0.157 24.1) |
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 #AA3133 | 6.57:1 | AA | Lc -86.5 | Fine for body text |
| Black text on #AA3133 | 3.19:1 | AA large text | Lc 22.6 | Dividers and decoration only |
| #AA3133 text on white | 6.57:1 | AA | Lc 81.4 | Fine for body text |
| #AA3133 text on black | 3.19:1 | AA large text | Lc -20.5 | 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
#FCF3F2
oklch(97.1% 0.01 25.1)
-
Step 100
100
#F8E5E3
oklch(93.7% 0.021 24.8)
-
Step 200
200
#F4CFCC
oklch(88.5% 0.042 23.5)
-
Step 300
300
#EEAEA9
oklch(80.9% 0.076 23.9)
-
Step 400
400
#E2817B
oklch(70.7% 0.121 24.3)
-
Step 500
500
#D75D59
oklch(63.1% 0.155 24.4)
-
Step 600
600
#C33E3F
oklch(55.6% 0.17 24.1)
-
Step 700
700 (this color)
#AA3133
oklch(49.8% 0.157 24.1)
-
Step 800
800
#882829
oklch(42.6% 0.131 24)
-
Step 900
900
#6E2726
oklch(37.8% 0.102 24)
-
Step 950
950
#411816
oklch(27.1% 0.064 25.1)
#AA3133 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) | #534D32 | 0.170 |
| Deuteranopia (no green cones) | #71672F | 0.157 |
| Tritanopia (no blue cones) | #BB0633 | 0.045 |
| Achromatopsia (no color) | #5D5D5D | 0.159 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #AA3133
#AA3133
oklch(49.8% 0.157 24.1)
- #007079
#007079
oklch(49.7% 0.085 204.6)
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 #AA3133, 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 0.024
- Brick #A03623 ΔE 0.029
- Rufous #AE2012 ΔE 0.030
- Rusty Red #AF2F0D ΔE 0.032
- Rust Red #AA2704 ΔE 0.034
- Rouge #AB1239 ΔE 0.040
- Auburn #9B2226 ΔE 0.043
Use #AA3133 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.