#644331
Closest named color: Purple Brown (#673A3F). oklch(41.6% 0.054 49.4), rgb(100, 67, 49).
Aa
White text reads best on this color (8.79:1).
About this color
#644331 is a dark, muted brown. In OKLCH its lightness is 42%, its chroma 0.054 and its hue 49°. Its hue sits on the warm side of the wheel. The nearest named color is Purple Brown (#673A3F), ΔE 0.039 away. White text reads best on it, at 8.79:1.
| Hue family | Browns |
| Lightness | dark (42%) |
| Chroma | muted (0.054) |
| Temperature | warm |
| Nearest name | Purple Brown (#673A3F) |
| Black text | 2.38:1 |
| White text | 8.79:1 |
Values
| HEX | #644331 |
| RGB | rgb(100, 67, 49) |
| HSL | hsl(21, 34%, 29%) |
| OKLCH | oklch(41.6% 0.054 49.4) |
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 #644331 | 8.79:1 | AAA | Lc -94.5 | Preferred for body text |
| Black text on #644331 | 2.38:1 | Fails | Lc 14.0 | Not readable |
| #644331 text on white | 8.79:1 | AAA | Lc 90.0 | Fine for body text |
| #644331 text on black | 2.38:1 | Fails | Lc -12.3 | 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
#F8F5F3
oklch(97.2% 0.004 56.4)
-
Step 100
100
#EFE8E5
oklch(93.6% 0.009 44.9)
-
Step 200
200
#E3D6CF
oklch(88.5% 0.017 50.4)
-
Step 300
300
#D2BBAF
oklch(80.8% 0.031 49.4)
-
Step 400
400
#BC9885
oklch(70.8% 0.051 49.3)
-
Step 500
500
#AA7E67
oklch(63.1% 0.064 48.7)
-
Step 600
600
#95674E
oklch(55.6% 0.07 49.3)
-
Step 700
700
#7F563F
oklch(49.2% 0.065 50)
-
Step 800
800 (this color)
#644331
oklch(41.6% 0.054 49.4)
-
Step 900
900
#543B2D
oklch(37.7% 0.042 50.3)
-
Step 950
950
#31231B
oklch(27% 0.026 51)
#644331 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) | #4C4630 | 0.044 |
| Deuteranopia (no green cones) | #544D31 | 0.040 |
| Tritanopia (no blue cones) | #6C3D3E | 0.034 |
| Achromatopsia (no color) | #4B4B4B | 0.054 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #644331
#644331
oklch(41.6% 0.054 49.4)
- #2A5164
#2A5164
oklch(41.5% 0.054 231.2)
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 #644331, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Purple Brown #673A3F ΔE 0.039
- Mud Brown #60460F ΔE 0.043
- Brownish Purple #76424E ΔE 0.059
- Milk Chocolate #7F4E1E ΔE 0.068
- Chestnut #742802 ΔE 0.069
- Green Brown #544E03 ΔE 0.071
- Olive Brown #645403 ΔE 0.074
- Charcoal Grey #3C4142 ΔE 0.075
Use #644331 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.