#644E39
Closest named color: Mud Brown (#60460F). oklch(44.1% 0.044 65), rgb(100, 78, 57).
Aa
White text reads best on this color (7.80:1).
About this color
#644E39 is a dark, muted brown. In OKLCH its lightness is 44%, its chroma 0.044 and its hue 65°. Its hue sits on the warm side of the wheel. The nearest named color is Mud Brown (#60460F), ΔE 0.047 away. White text reads best on it, at 7.80:1.
| Hue family | Browns |
| Lightness | dark (44%) |
| Chroma | muted (0.044) |
| Temperature | warm |
| Nearest name | Mud Brown (#60460F) |
| Black text | 2.69:1 |
| White text | 7.80:1 |
Values
| HEX | #644E39 |
| RGB | rgb(100, 78, 57) |
| HSL | hsl(29, 27%, 31%) |
| OKLCH | oklch(44.1% 0.044 65) |
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 #644E39 | 7.80:1 | AAA | Lc -91.8 | Preferred for body text |
| Black text on #644E39 | 2.69:1 | Fails | Lc 16.9 | Dividers and decoration only |
| #644E39 text on white | 7.80:1 | AAA | Lc 87.1 | Fine for body text |
| #644E39 text on black | 2.69:1 | Fails | Lc -15.0 | Dividers and decoration only |
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
#EDE9E5
oklch(93.6% 0.007 67.7)
-
Step 200
200
#E0D7D0
oklch(88.4% 0.014 60.5)
-
Step 300
300
#CDBEB0
oklch(81% 0.026 65.5)
-
Step 400
400
#B39C86
oklch(70.7% 0.041 65.8)
-
Step 500
500
#A08368
oklch(63% 0.052 64.6)
-
Step 600
600
#8B6D50
oklch(55.7% 0.057 65.3)
-
Step 700
700
#765B40
oklch(49.2% 0.053 66)
-
Step 800
800 (this color)
#644E39
oklch(44.1% 0.044 65)
-
Step 900
900
#4E3E2E
oklch(37.6% 0.034 66.5)
-
Step 950
950
#2E241B
oklch(26.9% 0.022 63.7)
#644E39 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) | #554F38 | 0.026 |
| Deuteranopia (no green cones) | #5A5439 | 0.024 |
| Tritanopia (no blue cones) | #6B4948 | 0.034 |
| Achromatopsia (no color) | #525252 | 0.044 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #644E39
#644E39
oklch(44.1% 0.044 65)
- #3E566A
#3E566A
oklch(44.2% 0.044 244.2)
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 #644E39, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mud Brown #60460F ΔE 0.047
- Milk Chocolate #7F4E1E ΔE 0.056
- Olive Brown #645403 ΔE 0.059
- Purple Brown #673A3F ΔE 0.062
- Medium Brown #7F5112 ΔE 0.063
- Brownish Purple #76424E ΔE 0.063
- Green Brown #544E03 ΔE 0.064
- Mud #735C12 ΔE 0.070
Use #644E39 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.