#643A25
Closest named color: Purple Brown (#673A3F). oklch(39.5% 0.068 46.7), rgb(100, 58, 37).
Aa
White text reads best on this color (9.66:1).
About this color
#643A25 is a dark, muted brown. In OKLCH its lightness is 39%, its chroma 0.068 and its hue 47°. Its hue sits on the warm side of the wheel. The nearest named color is Purple Brown (#673A3F), ΔE 0.040 away. White text reads best on it, at 9.66:1.
| Hue family | Browns |
| Lightness | dark (39%) |
| Chroma | muted (0.068) |
| Temperature | warm |
| Nearest name | Purple Brown (#673A3F) |
| Black text | 2.17:1 |
| White text | 9.66:1 |
Values
| HEX | #643A25 |
| RGB | rgb(100, 58, 37) |
| HSL | hsl(20, 46%, 27%) |
| OKLCH | oklch(39.5% 0.068 46.7) |
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 #643A25 | 9.66:1 | AAA | Lc -96.4 | Preferred for body text |
| Black text on #643A25 | 2.17:1 | Fails | Lc 11.8 | Not readable |
| #643A25 text on white | 9.66:1 | AAA | Lc 92.2 | Preferred for body text |
| #643A25 text on black | 2.17:1 | Fails | Lc -10.2 | 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 900.
-
Step 50
50
#FAF4F2
oklch(97.1% 0.007 39.5)
-
Step 100
100
#F3E7E2
oklch(93.6% 0.015 44.2)
-
Step 200
200
#EAD4CA
oklch(88.5% 0.028 46.1)
-
Step 300
300
#DEB7A5
oklch(80.9% 0.052 46.1)
-
Step 400
400
#CC9175
oklch(70.8% 0.082 46.3)
-
Step 500
500
#BD7551
oklch(63.2% 0.104 46.8)
-
Step 600
600
#A85C34
oklch(55.6% 0.113 47)
-
Step 700
700
#904B27
oklch(49% 0.105 46.5)
-
Step 800
800
#753E21
oklch(42.7% 0.087 47)
-
Step 900
900 (this color)
#643A25
oklch(39.5% 0.068 46.7)
-
Step 950
950
#381F14
oklch(27% 0.044 44.2)
#643A25 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) | #453F23 | 0.060 |
| Deuteranopia (no green cones) | #4F4825 | 0.055 |
| Tritanopia (no blue cones) | #6D3235 | 0.040 |
| Achromatopsia (no color) | #454545 | 0.068 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #643A25
#643A25
oklch(39.5% 0.068 46.7)
- #114D62
#114D62
oklch(39.4% 0.068 226.6)
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 #643A25, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Purple Brown #673A3F ΔE 0.040
- Mud Brown #60460F ΔE 0.047
- Chestnut #742802 ΔE 0.049
- Brownish Purple #76424E ΔE 0.071
- Red Brown #8B2E16 ΔE 0.078
- Charcoal Grey #3C4142 ΔE 0.078
- Rust Brown #8B3103 ΔE 0.078
- Green Brown #544E03 ΔE 0.079
Use #643A25 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.