#A43340
Closest named color: Brown (#A52A2A). oklch(49.2% 0.148 18), rgb(164, 51, 64).
Aa
White text reads best on this color (6.71:1).
About this color
#A43340 is a medium-dark, vivid red. In OKLCH its lightness is 49%, its chroma 0.148 and its hue 18°. Its hue sits on the warm side of the wheel. The nearest named color is Brown (#A52A2A), ΔE 0.026 away. White text reads best on it, at 6.71:1.
| Hue family | Reds |
| Lightness | medium-dark (49%) |
| Chroma | vivid (0.148) |
| Temperature | warm |
| Nearest name | Brown (#A52A2A) |
| Black text | 3.12:1 |
| White text | 6.71:1 |
Values
| HEX | #A43340 |
| RGB | rgb(164, 51, 64) |
| HSL | hsl(353, 53%, 42%) |
| OKLCH | oklch(49.2% 0.148 18) |
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 #A43340 | 6.71:1 | AA | Lc -87.2 | Fine for body text |
| Black text on #A43340 | 3.12:1 | AA large text | Lc 21.9 | Dividers and decoration only |
| #A43340 text on white | 6.71:1 | AA | Lc 82.2 | Fine for body text |
| #A43340 text on black | 3.12:1 | AA large text | Lc -19.7 | 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
#FCF3F3
oklch(97.1% 0.01 17.3)
-
Step 100
100
#F8E5E5
oklch(93.7% 0.021 17.5)
-
Step 200
200
#F3CFCF
oklch(88.5% 0.041 17.9)
-
Step 300
300
#EBAEAF
oklch(80.8% 0.072 17.7)
-
Step 400
400
#DF8285
oklch(70.7% 0.115 18.3)
-
Step 500
500
#D35F67
oklch(63.1% 0.147 18.1)
-
Step 600
600
#BE424F
oklch(55.6% 0.159 17.9)
-
Step 700
700 (this color)
#A43340
oklch(49.2% 0.148 18)
-
Step 800
800
#852B35
oklch(42.7% 0.123 17.6)
-
Step 900
900
#6B282E
oklch(37.6% 0.096 17.6)
-
Step 950
950
#3F181B
oklch(26.9% 0.061 17.4)
#A43340 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) | #504D40 | 0.162 |
| Deuteranopia (no green cones) | #6D643D | 0.148 |
| Tritanopia (no blue cones) | #B41838 | 0.039 |
| Achromatopsia (no color) | #5C5C5C | 0.149 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #A43340
#A43340
oklch(49.2% 0.148 18)
- #006F72
#006F72
oklch(49.2% 0.084 198.1)
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 #A43340, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Brown #A52A2A ΔE 0.026
- Rouge #AB1239 ΔE 0.037
- Brick #A03623 ΔE 0.038
- Firebrick #B22222 ΔE 0.041
- Light Burgundy #A8415B ΔE 0.041
- Auburn #9B2226 ΔE 0.043
- Light Maroon #A24857 ΔE 0.043
- Rufous #AE2012 ΔE 0.047
Use #A43340 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.