#AA3733
Closest named color: Brown (#A52A2A). oklch(50.5% 0.151 26.1), rgb(170, 55, 51).
Aa
White text reads best on this color (6.35:1).
About this color
#AA3733 is a medium-dark, vivid red. In OKLCH its lightness is 50%, its chroma 0.151 and its hue 26°. Its hue sits on the warm side of the wheel. The nearest named color is Brown (#A52A2A), ΔE 0.025 away. White text reads best on it, at 6.35:1.
| Hue family | Reds |
| Lightness | medium-dark (50%) |
| Chroma | vivid (0.151) |
| Temperature | warm |
| Nearest name | Brown (#A52A2A) |
| Black text | 3.30:1 |
| White text | 6.35:1 |
Values
| HEX | #AA3733 |
| RGB | rgb(170, 55, 51) |
| HSL | hsl(2, 54%, 43%) |
| OKLCH | oklch(50.5% 0.151 26.1) |
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 #AA3733 | 6.35:1 | AA | Lc -85.8 | Fine for body text |
| Black text on #AA3733 | 3.30:1 | AA large text | Lc 23.4 | Dividers and decoration only |
| #AA3733 text on white | 6.35:1 | AA | Lc 80.6 | Fine for body text |
| #AA3733 text on black | 3.30:1 | AA large text | Lc -21.2 | 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
#FCF3F2
oklch(97.1% 0.01 25.1)
-
Step 100
100
#F8E5E2
oklch(93.6% 0.021 28.3)
-
Step 200
200
#F3D0CB
oklch(88.6% 0.04 27.5)
-
Step 300
300
#ECAFA8
oklch(80.9% 0.073 26.2)
-
Step 400
400
#E0827A
oklch(70.6% 0.117 25.6)
-
Step 500
500
#D56058
oklch(63.2% 0.149 26.1)
-
Step 600
600
#C0423D
oklch(55.6% 0.163 26.1)
-
Step 700
700 (this color)
#AA3733
oklch(50.5% 0.151 26.1)
-
Step 800
800
#862B28
oklch(42.6% 0.125 25.8)
-
Step 900
900
#6C2925
oklch(37.7% 0.097 26.2)
-
Step 950
950
#401916
oklch(27.1% 0.062 26.4)
#AA3733 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) | #575032 | 0.161 |
| Deuteranopia (no green cones) | #73692F | 0.150 |
| Tritanopia (no blue cones) | #BB1837 | 0.047 |
| Achromatopsia (no color) | #5F5F5F | 0.153 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #AA3733
#AA3733
oklch(50.5% 0.151 26.1)
- #00727D
#00727D
oklch(50.4% 0.086 206.5)
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 #AA3733, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Brown #A52A2A ΔE 0.025
- Brick #A03623 ΔE 0.027
- Firebrick #B22222 ΔE 0.029
- Rusty Red #AF2F0D ΔE 0.030
- Rufous #AE2012 ΔE 0.035
- Rust Red #AA2704 ΔE 0.036
- Dull Red #BB3F3F ΔE 0.041
- Russet #A13905 ΔE 0.042
Use #AA3733 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.