#644A28
Closest named color: Mud Brown (#60460F). oklch(42.9% 0.061 72.4), rgb(100, 74, 40).
Aa
White text reads best on this color (8.22:1).
About this color
#644A28 is a dark, muted brown. In OKLCH its lightness is 43%, its chroma 0.061 and its hue 72°. Its hue sits on the warm side of the wheel. The nearest named color is Mud Brown (#60460F), ΔE 0.026 away. White text reads best on it, at 8.22:1.
| Hue family | Browns |
| Lightness | dark (43%) |
| Chroma | muted (0.061) |
| Temperature | warm |
| Nearest name | Mud Brown (#60460F) |
| Black text | 2.55:1 |
| White text | 8.22:1 |
Values
| HEX | #644A28 |
| RGB | rgb(100, 74, 40) |
| HSL | hsl(34, 43%, 27%) |
| OKLCH | oklch(42.9% 0.061 72.4) |
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 #644A28 | 8.22:1 | AAA | Lc -93.0 | Preferred for body text |
| Black text on #644A28 | 2.55:1 | Fails | Lc 15.6 | Dividers and decoration only |
| #644A28 text on white | 8.22:1 | AAA | Lc 88.4 | Fine for body text |
| #644A28 text on black | 2.55:1 | Fails | Lc -13.8 | 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
#F7F5F2
oklch(97.1% 0.005 78.3)
-
Step 100
100
#EEE9E3
oklch(93.6% 0.01 72.7)
-
Step 200
200
#E1D7CB
oklch(88.4% 0.02 72.6)
-
Step 300
300
#CFBDA8
oklch(80.8% 0.035 71.6)
-
Step 400
400
#B79B7A
oklch(70.6% 0.056 71.3)
-
Step 500
500
#A58358
oklch(63.2% 0.072 72.5)
-
Step 600
600
#906C3D
oklch(55.7% 0.079 72.4)
-
Step 700
700
#7A5A2F
oklch(49.1% 0.073 72.8)
-
Step 800
800 (this color)
#644A28
oklch(42.9% 0.061 72.4)
-
Step 900
900
#513E24
oklch(37.8% 0.048 74.2)
-
Step 950
950
#302416
oklch(27% 0.03 70.3)
#644A28 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) | #534B25 | 0.031 |
| Deuteranopia (no green cones) | #595129 | 0.027 |
| Tritanopia (no blue cones) | #6C4342 | 0.051 |
| Achromatopsia (no color) | #4F4F4F | 0.061 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #644A28
#644A28
oklch(42.9% 0.061 72.4)
- #375170
#375170
oklch(42.8% 0.061 253.4)
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 #644A28, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mud Brown #60460F ΔE 0.026
- Olive Brown #645403 ΔE 0.047
- Green Brown #544E03 ΔE 0.049
- Milk Chocolate #7F4E1E ΔE 0.053
- Medium Brown #7F5112 ΔE 0.059
- Purple Brown #673A3F ΔE 0.066
- Mud #735C12 ΔE 0.068
- Saddle Brown #8B4513 ΔE 0.073
Use #644A28 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.