#A43540
Closest named color: Brown (#A52A2A). oklch(49.4% 0.146 18.6), rgb(164, 53, 64).
Aa
White text reads best on this color (6.64:1).
About this color
#A43540 is a medium-dark, vivid red. In OKLCH its lightness is 49%, its chroma 0.146 and its hue 19°. Its hue sits on the warm side of the wheel. The nearest named color is Brown (#A52A2A), ΔE 0.027 away. White text reads best on it, at 6.64:1.
| Hue family | Reds |
| Lightness | medium-dark (49%) |
| Chroma | vivid (0.146) |
| Temperature | warm |
| Nearest name | Brown (#A52A2A) |
| Black text | 3.16:1 |
| White text | 6.64:1 |
Values
| HEX | #A43540 |
| RGB | rgb(164, 53, 64) |
| HSL | hsl(354, 51%, 43%) |
| OKLCH | oklch(49.4% 0.146 18.6) |
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 #A43540 | 6.64:1 | AA | Lc -87.0 | Fine for body text |
| Black text on #A43540 | 3.16:1 | AA large text | Lc 22.2 | Dividers and decoration only |
| #A43540 text on white | 6.64:1 | AA | Lc 81.9 | Fine for body text |
| #A43540 text on black | 3.16:1 | AA large text | Lc -20.0 | 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
#F7E5E4
oklch(93.6% 0.02 21.4)
-
Step 200
200
#F2CFCF
oklch(88.4% 0.039 17.9)
-
Step 300
300
#EBAFAF
oklch(80.9% 0.07 18.7)
-
Step 400
400
#DE8385
oklch(70.8% 0.112 18.9)
-
Step 500
500
#D26067
oklch(63.1% 0.144 18.4)
-
Step 600
600
#BD434E
oklch(55.5% 0.157 18.6)
-
Step 700
700 (this color)
#A43540
oklch(49.4% 0.146 18.6)
-
Step 800
800
#842C34
oklch(42.6% 0.121 18.6)
-
Step 900
900
#6B292E
oklch(37.8% 0.094 18.2)
-
Step 950
950
#3F191B
oklch(27.1% 0.059 18.7)
#A43540 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) | #524E40 | 0.158 |
| Deuteranopia (no green cones) | #6E653D | 0.146 |
| Tritanopia (no blue cones) | #B41C3A | 0.039 |
| Achromatopsia (no color) | #5C5C5C | 0.147 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #A43540
#A43540
oklch(49.4% 0.146 18.6)
- #007073
#007073
oklch(49.5% 0.084 198)
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 #A43540, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Brown #A52A2A ΔE 0.027
- Brick #A03623 ΔE 0.036
- Light Burgundy #A8415B ΔE 0.040
- Rouge #AB1239 ΔE 0.041
- Light Maroon #A24857 ΔE 0.041
- Firebrick #B22222 ΔE 0.041
- Auburn #9B2226 ΔE 0.044
- Rufous #AE2012 ΔE 0.047
Use #A43540 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.