#A3731D
Closest named color: Caramel (#AF6F09). oklch(59% 0.113 76.7), rgb(163, 115, 29).
Aa
Black text reads best on this color (5.02:1).
About this color
#A3731D is a medium-dark, moderately saturated brown. In OKLCH its lightness is 59%, its chroma 0.113 and its hue 77°. Its hue sits on the warm side of the wheel. The nearest named color is Caramel (#AF6F09), ΔE 0.022 away. Black text reads best on it, at 5.02:1.
| Hue family | Browns |
| Lightness | medium-dark (59%) |
| Chroma | moderately saturated (0.113) |
| Temperature | warm |
| Nearest name | Caramel (#AF6F09) |
| Black text | 5.02:1 |
| White text | 4.17:1 |
Values
| HEX | #A3731D |
| RGB | rgb(163, 115, 29) |
| HSL | hsl(39, 70%, 38%) |
| OKLCH | oklch(59% 0.113 76.7) |
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 #A3731D | 4.17:1 | AA large text | Lc -74.1 | Content text, not long reading |
| Black text on #A3731D | 5.02:1 | AA | Lc 35.5 | Non-text elements, placeholder text |
| #A3731D text on white | 4.17:1 | AA large text | Lc 68.6 | Content text, not long reading |
| #A3731D text on black | 5.02:1 | AA | Lc -33.1 | Non-text elements, placeholder text |
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 600.
-
Step 50
50
#F8F5F0
oklch(97.1% 0.007 80.7)
-
Step 100
100
#F0E9DF
oklch(93.7% 0.015 77.1)
-
Step 200
200
#E4D7C5
oklch(88.5% 0.028 76.2)
-
Step 300
300
#D4BD9C
oklch(80.9% 0.052 76.8)
-
Step 400
400
#BE9A65
oklch(70.7% 0.082 76.5)
-
Step 500
500
#AD8038
oklch(63% 0.105 76.4)
-
Step 600
600 (this color)
#A3731D
oklch(59% 0.113 76.7)
-
Step 700
700
#815700
oklch(49% 0.103 76.4)
-
Step 800
800
#6A4704
oklch(42.7% 0.088 75.9)
-
Step 900
900
#563C11
oklch(37.7% 0.068 76.1)
-
Step 950
950
#32230C
oklch(26.9% 0.043 75.8)
#A3731D 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) | #85750B | 0.054 |
| Deuteranopia (no green cones) | #908121 | 0.047 |
| Tritanopia (no blue cones) | #B26663 | 0.097 |
| Achromatopsia (no color) | #7C7C7C | 0.113 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #A3731D
#A3731D
oklch(59% 0.113 76.7)
- #4F7EC0
#4F7EC0
oklch(58.9% 0.114 257.1)
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 #A3731D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Caramel #AF6F09 ΔE 0.022
- Bronze #A87900 ΔE 0.023
- Leather #AC7434 ΔE 0.025
- Golden Brown #B27A01 ΔE 0.035
- Mustard Brown #AC7E04 ΔE 0.037
- Hazel #8E7618 ΔE 0.037
- Clay Brown #B2713D ΔE 0.041
- Umber #B26400 ΔE 0.041
Use #A3731D 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.