#A37F39
Closest named color: Coffee (#A6814C). oklch(61.7% 0.098 81.7), rgb(163, 127, 57).
Aa
Black text reads best on this color (5.65:1).
About this color
#A37F39 is a medium-dark, moderately saturated brown. In OKLCH its lightness is 62%, its chroma 0.098 and its hue 82°. Its hue sits on the warm side of the wheel. The nearest named color is Coffee (#A6814C), ΔE 0.020 away. Black text reads best on it, at 5.65:1.
| Hue family | Browns |
| Lightness | medium-dark (62%) |
| Chroma | moderately saturated (0.098) |
| Temperature | warm |
| Nearest name | Coffee (#A6814C) |
| Black text | 5.65:1 |
| White text | 3.71:1 |
Values
| HEX | #A37F39 |
| RGB | rgb(163, 127, 57) |
| HSL | hsl(40, 48%, 43%) |
| OKLCH | oklch(61.7% 0.098 81.7) |
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 #A37F39 | 3.71:1 | AA large text | Lc -70.1 | Content text, not long reading |
| Black text on #A37F39 | 5.65:1 | AA | Lc 39.5 | Non-text elements, placeholder text |
| #A37F39 text on white | 3.71:1 | AA large text | Lc 64.6 | Content text, not long reading |
| #A37F39 text on black | 5.65:1 | AA | Lc -37.1 | 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 500.
-
Step 50
50
#F8F5F1
oklch(97.1% 0.006 75.4)
-
Step 100
100
#EFE9E0
oklch(93.6% 0.014 78.3)
-
Step 200
200
#E2D8C6
oklch(88.5% 0.027 82.4)
-
Step 300
300
#D0BE9E
oklch(80.8% 0.048 82)
-
Step 400
400
#B99C68
oklch(70.7% 0.077 81.5)
-
Step 500
500 (this color)
#A37F39
oklch(61.7% 0.098 81.7)
-
Step 600
600
#926C17
oklch(55.6% 0.107 82)
-
Step 700
700
#7D5A05
oklch(49.2% 0.1 81.6)
-
Step 800
800
#654A0C
oklch(42.7% 0.082 82.6)
-
Step 900
900
#533E14
oklch(37.8% 0.064 81.7)
-
Step 950
950
#30240D
oklch(26.9% 0.041 81.8)
#A37F39 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) | #8E7F32 | 0.036 |
| Deuteranopia (no green cones) | #97883B | 0.029 |
| Tritanopia (no blue cones) | #B07470 | 0.087 |
| Achromatopsia (no color) | #848484 | 0.098 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #A37F39
#A37F39
oklch(61.7% 0.098 81.7)
- #6485C1
#6485C1
oklch(61.7% 0.099 261.8)
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 #A37F39, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Coffee #A6814C ΔE 0.020
- Tan Brown #AB7E4C ΔE 0.027
- Bronze #A87900 ΔE 0.029
- Puce #A57E52 ΔE 0.029
- Mustard Brown #AC7E04 ΔE 0.029
- Leather #AC7434 ΔE 0.030
- Light Brown #AD8150 ΔE 0.031
- Golden Brown #B27A01 ΔE 0.033
Use #A37F39 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.