#AA373F
Closest named color: Brown (#A52A2A). oklch(50.7% 0.15 20.4), rgb(170, 55, 63).
Aa
White text reads best on this color (6.31:1).
About this color
#AA373F is a medium-dark, vivid red. In OKLCH its lightness is 51%, its chroma 0.150 and its hue 20°. Its hue sits on the warm side of the wheel. The nearest named color is Brown (#A52A2A), ΔE 0.031 away. White text reads best on it, at 6.31:1.
| Hue family | Reds |
| Lightness | medium-dark (51%) |
| Chroma | vivid (0.150) |
| Temperature | warm |
| Nearest name | Brown (#A52A2A) |
| Black text | 3.32:1 |
| White text | 6.31:1 |
Values
| HEX | #AA373F |
| RGB | rgb(170, 55, 63) |
| HSL | hsl(356, 51%, 44%) |
| OKLCH | oklch(50.7% 0.15 20.4) |
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 #AA373F | 6.31:1 | AA | Lc -85.6 | Fine for body text |
| Black text on #AA373F | 3.32:1 | AA large text | Lc 23.6 | Dividers and decoration only |
| #AA373F text on white | 6.31:1 | AA | Lc 80.5 | Fine for body text |
| #AA373F text on black | 3.32:1 | AA large text | Lc -21.4 | 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
#FCF3F3
oklch(97.1% 0.01 17.3)
-
Step 100
100
#F8E5E4
oklch(93.7% 0.021 21.2)
-
Step 200
200
#F3CFCE
oklch(88.5% 0.041 19.8)
-
Step 300
300
#ECAEAD
oklch(80.8% 0.073 19.8)
-
Step 400
400
#E08282
oklch(70.8% 0.116 20.4)
-
Step 500
500
#D45F62
oklch(63.1% 0.148 20.7)
-
Step 600
600
#BF4149
oklch(55.5% 0.161 20.5)
-
Step 700
700 (this color)
#AA373F
oklch(50.7% 0.15 20.4)
-
Step 800
800
#862B31
oklch(42.8% 0.124 20.4)
-
Step 900
900
#6C282B
oklch(37.7% 0.097 20.4)
-
Step 950
950
#3F1819
oklch(26.8% 0.061 20.5)
#AA373F 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) | #55503E | 0.163 |
| Deuteranopia (no green cones) | #72693C | 0.151 |
| Tritanopia (no blue cones) | #BA1C3B | 0.040 |
| Achromatopsia (no color) | #606060 | 0.151 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #AA373F
#AA373F
oklch(50.7% 0.15 20.4)
- #007379
#007379
oklch(50.5% 0.086 201.2)
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 #AA373F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Brown #A52A2A ΔE 0.031
- Firebrick #B22222 ΔE 0.036
- Light Burgundy #A8415B ΔE 0.038
- Brick #A03623 ΔE 0.039
- Light Maroon #A24857 ΔE 0.039
- Dull Red #BB3F3F ΔE 0.040
- Rusty Red #AF2F0D ΔE 0.044
- Rufous #AE2012 ΔE 0.045
Use #AA373F 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.