#A37F2B
Closest named color: Mustard Brown (#AC7E04). oklch(61.6% 0.109 84.8), rgb(163, 127, 43).
Aa
Black text reads best on this color (5.62:1).
About this color
#A37F2B is a medium-dark, moderately saturated brown. In OKLCH its lightness is 62%, its chroma 0.109 and its hue 85°. Its hue sits on the warm side of the wheel. The nearest named color is Mustard Brown (#AC7E04), ΔE 0.020 away. Black text reads best on it, at 5.62:1.
| Hue family | Browns |
| Lightness | medium-dark (62%) |
| Chroma | moderately saturated (0.109) |
| Temperature | warm |
| Nearest name | Mustard Brown (#AC7E04) |
| Black text | 5.62:1 |
| White text | 3.73:1 |
Values
| HEX | #A37F2B |
| RGB | rgb(163, 127, 43) |
| HSL | hsl(42, 58%, 40%) |
| OKLCH | oklch(61.6% 0.109 84.8) |
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 #A37F2B | 3.73:1 | AA large text | Lc -70.2 | Content text, not long reading |
| Black text on #A37F2B | 5.62:1 | AA | Lc 39.3 | Non-text elements, placeholder text |
| #A37F2B text on white | 3.73:1 | AA large text | Lc 64.7 | Content text, not long reading |
| #A37F2B text on black | 5.62:1 | AA | Lc -36.9 | 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
#F8F5F0
oklch(97.1% 0.007 80.7)
-
Step 100
100
#EFE9DF
oklch(93.6% 0.015 80.7)
-
Step 200
200
#E2D8C4
oklch(88.5% 0.029 84.6)
-
Step 300
300
#D1BF9A
oklch(81% 0.054 85.1)
-
Step 400
400
#B99D61
oklch(70.8% 0.085 85.3)
-
Step 500
500 (this color)
#A37F2B
oklch(61.6% 0.109 84.8)
-
Step 600
600
#926D00
oklch(55.7% 0.114 85)
-
Step 700
700
#7B5B00
oklch(49.1% 0.101 84.7)
-
Step 800
800
#654A00
oklch(42.7% 0.087 84.5)
-
Step 900
900
#533E0B
oklch(37.7% 0.071 84.5)
-
Step 950
950
#312409
oklch(26.9% 0.045 82.8)
#A37F2B 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) | #8F7F1F | 0.036 |
| Deuteranopia (no green cones) | #97882F | 0.029 |
| Tritanopia (no blue cones) | #B1736E | 0.098 |
| Achromatopsia (no color) | #848484 | 0.109 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #A37F2B
#A37F2B
oklch(61.6% 0.109 84.8)
- #6483C6
#6483C6
oklch(61.5% 0.108 264.5)
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 #A37F2B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mustard Brown #AC7E04 ΔE 0.020
- Bronze #A87900 ΔE 0.020
- Golden Brown #B27A01 ΔE 0.028
- Coffee #A6814C ΔE 0.032
- Leather #AC7434 ΔE 0.035
- Dark Mustard #A88905 ΔE 0.036
- Tan Brown #AB7E4C ΔE 0.037
- Dark Tan #AF884A ΔE 0.040
Use #A37F2B 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.