#644B42
Closest named color: Purple Brown (#673A3F). oklch(43.7% 0.037 40.7), rgb(100, 75, 66).
Aa
White text reads best on this color (7.99:1).
About this color
#644B42 is a dark, muted brown. In OKLCH its lightness is 44%, its chroma 0.037 and its hue 41°. Its hue sits on the warm side of the wheel. The nearest named color is Purple Brown (#673A3F), ΔE 0.047 away. White text reads best on it, at 7.99:1.
| Hue family | Browns |
| Lightness | dark (44%) |
| Chroma | muted (0.037) |
| Temperature | warm |
| Nearest name | Purple Brown (#673A3F) |
| Black text | 2.62:1 |
| White text | 7.99:1 |
Values
| HEX | #644B42 |
| RGB | rgb(100, 75, 66) |
| HSL | hsl(16, 20%, 33%) |
| OKLCH | oklch(43.7% 0.037 40.7) |
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 #644B42 | 7.99:1 | AAA | Lc -92.4 | Preferred for body text |
| Black text on #644B42 | 2.62:1 | Fails | Lc 16.3 | Dividers and decoration only |
| #644B42 text on white | 7.99:1 | AAA | Lc 87.7 | Fine for body text |
| #644B42 text on black | 2.62:1 | Fails | Lc -14.5 | 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
#EEE8E7
oklch(93.5% 0.007 28.8)
-
Step 200
200
#E1D7D3
oklch(88.6% 0.012 43.3)
-
Step 300
300
#CEBCB6
oklch(80.9% 0.022 39.4)
-
Step 400
400
#B59A90
oklch(70.8% 0.035 41.4)
-
Step 500
500
#A28175
oklch(63.1% 0.045 40.9)
-
Step 600
600
#8D6A5E
oklch(55.6% 0.049 39.7)
-
Step 700
700
#77584D
oklch(49% 0.045 40.4)
-
Step 800
800 (this color)
#644B42
oklch(43.7% 0.037 40.7)
-
Step 900
900
#4F3D36
oklch(37.7% 0.028 42.3)
-
Step 950
950
#2F2420
oklch(27.2% 0.018 40.9)
#644B42 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) | #514E41 | 0.034 |
| Deuteranopia (no green cones) | #575342 | 0.032 |
| Tritanopia (no blue cones) | #6A4749 | 0.022 |
| Achromatopsia (no color) | #515151 | 0.037 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #644B42
#644B42
oklch(43.7% 0.037 40.7)
- #3A5760
#3A5760
oklch(43.8% 0.037 219.2)
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 #644B42, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Purple Brown #673A3F ΔE 0.047
- Brownish Purple #76424E ΔE 0.049
- Mud Brown #60460F ΔE 0.060
- Milk Chocolate #7F4E1E ΔE 0.067
- Medium Brown #7F5112 ΔE 0.076
- Olive Brown #645403 ΔE 0.077
- Charcoal Grey #3C4142 ΔE 0.079
- Green Brown #544E03 ΔE 0.080
Use #644B42 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.