#A03540
Closest named color: Brown (#A52A2A). oklch(48.8% 0.141 18.2), rgb(160, 53, 64).
Aa
White text reads best on this color (6.82:1).
About this color
#A03540 is a medium-dark, vivid red. In OKLCH its lightness is 49%, its chroma 0.141 and its hue 18°. Its hue sits on the warm side of the wheel. The nearest named color is Brown (#A52A2A), ΔE 0.028 away. White text reads best on it, at 6.82:1.
| Hue family | Reds |
| Lightness | medium-dark (49%) |
| Chroma | vivid (0.141) |
| Temperature | warm |
| Nearest name | Brown (#A52A2A) |
| Black text | 3.07:1 |
| White text | 6.82:1 |
Values
| HEX | #A03540 |
| RGB | rgb(160, 53, 64) |
| HSL | hsl(354, 50%, 42%) |
| OKLCH | oklch(48.8% 0.141 18.2) |
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 #A03540 | 6.82:1 | AA | Lc -87.7 | Fine for body text |
| Black text on #A03540 | 3.07:1 | AA large text | Lc 21.4 | Dividers and decoration only |
| #A03540 text on white | 6.82:1 | AA | Lc 82.7 | Fine for body text |
| #A03540 text on black | 3.07:1 | AA large text | Lc -19.3 | 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
#F7E5E5
oklch(93.6% 0.02 17.5)
-
Step 200
200
#F1D0D0
oklch(88.5% 0.037 17.9)
-
Step 300
300
#EAAFB0
oklch(80.9% 0.069 17.6)
-
Step 400
400
#DC8486
oklch(70.7% 0.109 18.7)
-
Step 500
500
#D06269
oklch(63.1% 0.139 18)
-
Step 600
600
#BB4550
oklch(55.5% 0.152 18.1)
-
Step 700
700 (this color)
#A03540
oklch(48.8% 0.141 18.2)
-
Step 800
800
#832E36
oklch(42.7% 0.117 18)
-
Step 900
900
#6A2A2F
oklch(37.8% 0.092 17.9)
-
Step 950
950
#3E191B
oklch(26.9% 0.058 18.4)
#A03540 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 | 0.155 |
| Deuteranopia (no green cones) | #6B633D | 0.143 |
| Tritanopia (no blue cones) | #AF1E3A | 0.037 |
| Achromatopsia (no color) | #5B5B5B | 0.142 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #A03540
#A03540
oklch(48.8% 0.141 18.2)
- #006E71
#006E71
oklch(48.9% 0.083 198.1)
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 #A03540, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Brown #A52A2A ΔE 0.028
- Brick #A03623 ΔE 0.036
- Auburn #9B2226 ΔE 0.040
- Rouge #AB1239 ΔE 0.042
- Light Maroon #A24857 ΔE 0.043
- Light Burgundy #A8415B ΔE 0.043
- Firebrick #B22222 ΔE 0.046
- Rufous #AE2012 ΔE 0.050
Use #A03540 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.