#644C41
Closest named color: Purple Brown (#673A3F). oklch(43.9% 0.037 45.8), rgb(100, 76, 65).
Aa
White text reads best on this color (7.91:1).
About this color
#644C41 is a dark, muted brown. In OKLCH its lightness is 44%, its chroma 0.037 and its hue 46°. Its hue sits on the warm side of the wheel. The nearest named color is Purple Brown (#673A3F), ΔE 0.051 away. White text reads best on it, at 7.91:1.
| Hue family | Browns |
| Lightness | dark (44%) |
| Chroma | muted (0.037) |
| Temperature | warm |
| Nearest name | Purple Brown (#673A3F) |
| Black text | 2.65:1 |
| White text | 7.91:1 |
Values
| HEX | #644C41 |
| RGB | rgb(100, 76, 65) |
| HSL | hsl(19, 21%, 32%) |
| OKLCH | oklch(43.9% 0.037 45.8) |
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 #644C41 | 7.91:1 | AAA | Lc -92.1 | Preferred for body text |
| Black text on #644C41 | 2.65:1 | Fails | Lc 16.6 | Dividers and decoration only |
| #644C41 text on white | 7.91:1 | AAA | Lc 87.4 | Fine for body text |
| #644C41 text on black | 2.65:1 | Fails | Lc -14.7 | 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
#F7F5F4
oklch(97.1% 0.003 48.7)
-
Step 100
100
#EEE9E6
oklch(93.7% 0.007 53.4)
-
Step 200
200
#E0D7D3
oklch(88.5% 0.011 45.7)
-
Step 300
300
#CDBDB5
oklch(80.9% 0.021 48.4)
-
Step 400
400
#B49A8F
oklch(70.6% 0.035 44.3)
-
Step 500
500
#A18273
oklch(63.2% 0.044 47.2)
-
Step 600
600
#8C6B5C
oklch(55.7% 0.048 45.6)
-
Step 700
700
#77594B
oklch(49.1% 0.045 46.2)
-
Step 800
800 (this color)
#644C41
oklch(43.9% 0.037 45.8)
-
Step 900
900
#4F3D35
oklch(37.7% 0.029 45.2)
-
Step 950
950
#2E241F
oklch(27% 0.018 48)
#644C41 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) | #524E40 | 0.032 |
| Deuteranopia (no green cones) | #585341 | 0.028 |
| Tritanopia (no blue cones) | #6A4849 | 0.023 |
| Achromatopsia (no color) | #515151 | 0.037 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #644C41
#644C41
oklch(43.9% 0.037 45.8)
- #3C5762
#3C5762
oklch(44% 0.037 225.2)
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 #644C41, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Purple Brown #673A3F ΔE 0.051
- Brownish Purple #76424E ΔE 0.051
- Mud Brown #60460F ΔE 0.058
- Milk Chocolate #7F4E1E ΔE 0.064
- Medium Brown #7F5112 ΔE 0.073
- Olive Brown #645403 ΔE 0.074
- Green Brown #544E03 ΔE 0.077
- Charcoal Grey #3C4142 ΔE 0.081
Use #644C41 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.