#644C3D
Closest named color: Mud Brown (#60460F). oklch(43.8% 0.04 53.4), rgb(100, 76, 61).
Aa
White text reads best on this color (7.94:1).
About this color
#644C3D is a dark, muted brown. In OKLCH its lightness is 44%, its chroma 0.040 and its hue 53°. Its hue sits on the warm side of the wheel. The nearest named color is Mud Brown (#60460F), ΔE 0.052 away. White text reads best on it, at 7.94:1.
| Hue family | Browns |
| Lightness | dark (44%) |
| Chroma | muted (0.040) |
| Temperature | warm |
| Nearest name | Mud Brown (#60460F) |
| Black text | 2.64:1 |
| White text | 7.94:1 |
Values
| HEX | #644C3D |
| RGB | rgb(100, 76, 61) |
| HSL | hsl(23, 24%, 32%) |
| OKLCH | oklch(43.8% 0.04 53.4) |
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 #644C3D | 7.94:1 | AAA | Lc -92.2 | Preferred for body text |
| Black text on #644C3D | 2.64:1 | Fails | Lc 16.5 | Dividers and decoration only |
| #644C3D text on white | 7.94:1 | AAA | Lc 87.5 | Fine for body text |
| #644C3D text on black | 2.64:1 | Fails | Lc -14.6 | 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
#F7F5F3
oklch(97.1% 0.003 67.8)
-
Step 100
100
#EEE9E6
oklch(93.7% 0.007 53.4)
-
Step 200
200
#E0D7D1
oklch(88.5% 0.013 56.2)
-
Step 300
300
#CEBDB3
oklch(81% 0.024 52.6)
-
Step 400
400
#B49B8B
oklch(70.7% 0.038 54.6)
-
Step 500
500
#A1826E
oklch(63.1% 0.048 54.5)
-
Step 600
600
#8C6B56
oklch(55.5% 0.053 53.8)
-
Step 700
700
#775947
oklch(49% 0.048 52.2)
-
Step 800
800 (this color)
#644C3D
oklch(43.8% 0.04 53.4)
-
Step 900
900
#4F3D32
oklch(37.6% 0.031 52.9)
-
Step 950
950
#2E241D
oklch(27% 0.02 56.7)
#644C3D 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) | #534E3C | 0.030 |
| Deuteranopia (no green cones) | #58533D | 0.028 |
| Tritanopia (no blue cones) | #6B4848 | 0.027 |
| Achromatopsia (no color) | #515151 | 0.040 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #644C3D
#644C3D
oklch(43.8% 0.04 53.4)
- #3B5665
#3B5665
oklch(43.8% 0.041 233.3)
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 #644C3D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mud Brown #60460F ΔE 0.052
- Purple Brown #673A3F ΔE 0.053
- Brownish Purple #76424E ΔE 0.056
- Milk Chocolate #7F4E1E ΔE 0.061
- Olive Brown #645403 ΔE 0.068
- Medium Brown #7F5112 ΔE 0.069
- Green Brown #544E03 ΔE 0.072
- Saddle Brown #8B4513 ΔE 0.079
Use #644C3D 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.