#643F16
Closest named color: Mud Brown (#60460F). oklch(40.3% 0.075 65.1), rgb(100, 63, 22).
Aa
White text reads best on this color (9.27:1).
About this color
#643F16 is a dark, moderately saturated brown. In OKLCH its lightness is 40%, its chroma 0.075 and its hue 65°. Its hue sits on the warm side of the wheel. The nearest named color is Mud Brown (#60460F), ΔE 0.024 away. White text reads best on it, at 9.27:1.
| Hue family | Browns |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.075) |
| Temperature | warm |
| Nearest name | Mud Brown (#60460F) |
| Black text | 2.26:1 |
| White text | 9.27:1 |
Values
| HEX | #643F16 |
| RGB | rgb(100, 63, 22) |
| HSL | hsl(32, 64%, 24%) |
| OKLCH | oklch(40.3% 0.075 65.1) |
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 #643F16 | 9.27:1 | AAA | Lc -95.5 | Preferred for body text |
| Black text on #643F16 | 2.26:1 | Fails | Lc 12.8 | Not readable |
| #643F16 text on white | 9.27:1 | AAA | Lc 91.2 | Preferred for body text |
| #643F16 text on black | 2.26:1 | Fails | Lc -11.2 | Not readable |
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 800.
-
Step 50
50
#F8F5F1
oklch(97.1% 0.006 75.4)
-
Step 100
100
#F0E8E1
oklch(93.5% 0.013 63.9)
-
Step 200
200
#E5D6C9
oklch(88.5% 0.024 63.5)
-
Step 300
300
#D5BBA3
oklch(80.8% 0.044 64.9)
-
Step 400
400
#C09872
oklch(70.8% 0.071 64.8)
-
Step 500
500
#AF7E4C
oklch(63.1% 0.09 65.5)
-
Step 600
600
#9A662E
oklch(55.5% 0.098 65.2)
-
Step 700
700
#845521
oklch(49.2% 0.091 65.2)
-
Step 800
800 (this color)
#643F16
oklch(40.3% 0.075 65.1)
-
Step 900
900
#573B1E
oklch(37.8% 0.058 65.4)
-
Step 950
950
#332312
oklch(27.1% 0.037 66.8)
#643F16 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) | #4B4211 | 0.049 |
| Deuteranopia (no green cones) | #544B17 | 0.044 |
| Tritanopia (no blue cones) | #6E3636 | 0.058 |
| Achromatopsia (no color) | #474747 | 0.075 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #643F16
#643F16
oklch(40.3% 0.075 65.1)
- #214C6E
#214C6E
oklch(40.3% 0.075 245.1)
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 #643F16, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mud Brown #60460F ΔE 0.024
- Green Brown #544E03 ΔE 0.057
- Chestnut #742802 ΔE 0.058
- Purple Brown #673A3F ΔE 0.062
- Olive Brown #645403 ΔE 0.066
- Milk Chocolate #7F4E1E ΔE 0.070
- Medium Brown #7F5112 ΔE 0.076
- Rust Brown #8B3103 ΔE 0.079
Use #643F16 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.