#644837
Closest named color: Mud Brown (#60460F). oklch(42.8% 0.047 52.3), rgb(100, 72, 55).
Aa
White text reads best on this color (8.32:1).
About this color
#644837 is a dark, muted brown. In OKLCH its lightness is 43%, its chroma 0.047 and its hue 52°. Its hue sits on the warm side of the wheel. The nearest named color is Mud Brown (#60460F), ΔE 0.045 away. White text reads best on it, at 8.32:1.
| Hue family | Browns |
| Lightness | dark (43%) |
| Chroma | muted (0.047) |
| Temperature | warm |
| Nearest name | Mud Brown (#60460F) |
| Black text | 2.52:1 |
| White text | 8.32:1 |
Values
| HEX | #644837 |
| RGB | rgb(100, 72, 55) |
| HSL | hsl(23, 29%, 30%) |
| OKLCH | oklch(42.8% 0.047 52.3) |
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 #644837 | 8.32:1 | AAA | Lc -93.3 | Preferred for body text |
| Black text on #644837 | 2.52:1 | Fails | Lc 15.3 | Dividers and decoration only |
| #644837 text on white | 8.32:1 | AAA | Lc 88.7 | Fine for body text |
| #644837 text on black | 2.52:1 | Fails | Lc -13.5 | 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
#F7F5F3
oklch(97.1% 0.003 67.8)
-
Step 100
100
#EEE8E5
oklch(93.5% 0.008 48.7)
-
Step 200
200
#E2D7D0
oklch(88.6% 0.015 54.9)
-
Step 300
300
#D0BCB1
oklch(80.9% 0.028 50.8)
-
Step 400
400
#B89A88
oklch(70.8% 0.044 52.7)
-
Step 500
500
#A5806A
oklch(63% 0.056 52.1)
-
Step 600
600
#906952
oklch(55.5% 0.061 51.6)
-
Step 700
700
#7B5842
oklch(49.2% 0.057 53.1)
-
Step 800
800 (this color)
#644837
oklch(42.8% 0.047 52.3)
-
Step 900
900
#513C30
oklch(37.6% 0.036 51)
-
Step 950
950
#30231C
oklch(26.9% 0.024 49.6)
#644837 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) | #504A36 | 0.036 |
| Deuteranopia (no green cones) | #565037 | 0.033 |
| Tritanopia (no blue cones) | #6B4344 | 0.031 |
| Achromatopsia (no color) | #4E4E4E | 0.047 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #644837
#644837
oklch(42.8% 0.047 52.3)
- #345465
#345465
oklch(42.8% 0.047 232.6)
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 #644837, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mud Brown #60460F ΔE 0.045
- Purple Brown #673A3F ΔE 0.046
- Brownish Purple #76424E ΔE 0.056
- Milk Chocolate #7F4E1E ΔE 0.062
- Olive Brown #645403 ΔE 0.069
- Green Brown #544E03 ΔE 0.069
- Medium Brown #7F5112 ΔE 0.071
- Charcoal Grey #3C4142 ΔE 0.078
Use #644837 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.