#644337
Closest named color: Purple Brown (#673A3F). oklch(41.7% 0.05 40.8), rgb(100, 67, 55).
Aa
White text reads best on this color (8.75:1).
About this color
#644337 is a dark, muted brown. In OKLCH its lightness is 42%, its chroma 0.050 and its hue 41°. Its hue sits on the warm side of the wheel. The nearest named color is Purple Brown (#673A3F), ΔE 0.033 away. White text reads best on it, at 8.75:1.
| Hue family | Browns |
| Lightness | dark (42%) |
| Chroma | muted (0.050) |
| Temperature | warm |
| Nearest name | Purple Brown (#673A3F) |
| Black text | 2.39:1 |
| White text | 8.75:1 |
Values
| HEX | #644337 |
| RGB | rgb(100, 67, 55) |
| HSL | hsl(16, 29%, 30%) |
| OKLCH | oklch(41.7% 0.05 40.8) |
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 #644337 | 8.75:1 | AAA | Lc -94.4 | Preferred for body text |
| Black text on #644337 | 2.39:1 | Fails | Lc 14.1 | Not readable |
| #644337 text on white | 8.75:1 | AAA | Lc 89.9 | Fine for body text |
| #644337 text on black | 2.39:1 | Fails | Lc -12.4 | 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
#EFE8E6
oklch(93.6% 0.008 36.6)
-
Step 200
200
#E3D6D1
oklch(88.5% 0.016 42.4)
-
Step 300
300
#D2BBB2
oklch(80.9% 0.029 42.6)
-
Step 400
400
#BB978B
oklch(70.6% 0.047 39.3)
-
Step 500
500
#AA7E6E
oklch(63.2% 0.06 40.9)
-
Step 600
600
#956756
oklch(55.8% 0.065 41.1)
-
Step 700
700
#7F5546
oklch(49.1% 0.061 40.4)
-
Step 800
800 (this color)
#644337
oklch(41.7% 0.05 40.8)
-
Step 900
900
#543B32
oklch(37.8% 0.039 40.6)
-
Step 950
950
#31221D
oklch(26.9% 0.025 39.2)
#644337 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) | #4B4736 | 0.046 |
| Deuteranopia (no green cones) | #534E37 | 0.043 |
| Tritanopia (no blue cones) | #6C3E40 | 0.027 |
| Achromatopsia (no color) | #4B4B4B | 0.050 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #644337
#644337
oklch(41.7% 0.05 40.8)
- #2A535F
#2A535F
oklch(41.8% 0.05 219.1)
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 #644337, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Purple Brown #673A3F ΔE 0.033
- Mud Brown #60460F ΔE 0.051
- Brownish Purple #76424E ΔE 0.052
- Milk Chocolate #7F4E1E ΔE 0.072
- Chestnut #742802 ΔE 0.072
- Charcoal Grey #3C4142 ΔE 0.073
- Green Brown #544E03 ΔE 0.078
- Olive Brown #645403 ΔE 0.081
Use #644337 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.