#643A18
Closest named color: Mud Brown (#60460F). oklch(39.3% 0.076 56.8), rgb(100, 58, 24).
Aa
White text reads best on this color (9.72:1).
About this color
#643A18 is a dark, moderately saturated brown. In OKLCH its lightness is 39%, its chroma 0.076 and its hue 57°. Its hue sits on the warm side of the wheel. The nearest named color is Mud Brown (#60460F), ΔE 0.038 away. White text reads best on it, at 9.72:1.
| Hue family | Browns |
| Lightness | dark (39%) |
| Chroma | moderately saturated (0.076) |
| Temperature | warm |
| Nearest name | Mud Brown (#60460F) |
| Black text | 2.16:1 |
| White text | 9.72:1 |
Values
| HEX | #643A18 |
| RGB | rgb(100, 58, 24) |
| HSL | hsl(27, 61%, 24%) |
| OKLCH | oklch(39.3% 0.076 56.8) |
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 #643A18 | 9.72:1 | AAA | Lc -96.5 | Preferred for body text |
| Black text on #643A18 | 2.16:1 | Fails | Lc 11.7 | Not readable |
| #643A18 text on white | 9.72:1 | AAA | Lc 92.3 | Preferred for body text |
| #643A18 text on black | 2.16:1 | Fails | Lc -10.1 | 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 900.
-
Step 50
50
#FAF4F1
oklch(97.1% 0.008 48.7)
-
Step 100
100
#F3E7DF
oklch(93.5% 0.017 56.2)
-
Step 200
200
#EAD4C5
oklch(88.4% 0.032 56.6)
-
Step 300
300
#DEB89D
oklch(80.9% 0.057 57.2)
-
Step 400
400
#CC9267
oklch(70.7% 0.091 57.2)
-
Step 500
500
#BE753C
oklch(63% 0.117 56.4)
-
Step 600
600
#A95D15
oklch(55.6% 0.126 57.2)
-
Step 700
700
#914C03
oklch(49.1% 0.117 57)
-
Step 800
800
#763F0B
oklch(42.8% 0.097 57.1)
-
Step 900
900 (this color)
#643A18
oklch(39.3% 0.076 56.8)
-
Step 950
950
#38200D
oklch(27% 0.048 57.2)
#643A18 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) | #463E14 | 0.059 |
| Deuteranopia (no green cones) | #504818 | 0.053 |
| Tritanopia (no blue cones) | #6E3133 | 0.053 |
| Achromatopsia (no color) | #444444 | 0.076 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #643A18
#643A18
oklch(39.3% 0.076 56.8)
- #124B69
#124B69
oklch(39.2% 0.076 237)
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 #643A18, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mud Brown #60460F ΔE 0.038
- Chestnut #742802 ΔE 0.047
- Purple Brown #673A3F ΔE 0.055
- Green Brown #544E03 ΔE 0.070
- Rust Brown #8B3103 ΔE 0.078
- Milk Chocolate #7F4E1E ΔE 0.080
- Red Brown #8B2E16 ΔE 0.080
- Olive Brown #645403 ΔE 0.080
Use #643A18 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.