#643A2B
Closest named color: Purple Brown (#673A3F). oklch(39.6% 0.065 40.3), rgb(100, 58, 43).
Aa
White text reads best on this color (9.62:1).
About this color
#643A2B is a dark, muted brown. In OKLCH its lightness is 40%, its chroma 0.065 and its hue 40°. Its hue sits on the warm side of the wheel. The nearest named color is Purple Brown (#673A3F), ΔE 0.032 away. White text reads best on it, at 9.62:1.
| Hue family | Browns |
| Lightness | dark (40%) |
| Chroma | muted (0.065) |
| Temperature | warm |
| Nearest name | Purple Brown (#673A3F) |
| Black text | 2.18:1 |
| White text | 9.62:1 |
Values
| HEX | #643A2B |
| RGB | rgb(100, 58, 43) |
| HSL | hsl(16, 40%, 28%) |
| OKLCH | oklch(39.6% 0.065 40.3) |
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 #643A2B | 9.62:1 | AAA | Lc -96.3 | Preferred for body text |
| Black text on #643A2B | 2.18:1 | Fails | Lc 11.9 | Not readable |
| #643A2B text on white | 9.62:1 | AAA | Lc 92.1 | Preferred for body text |
| #643A2B text on black | 2.18:1 | Fails | Lc -10.3 | 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
#F3E7E3
oklch(93.6% 0.014 39.4)
-
Step 200
200
#EAD4CC
oklch(88.6% 0.027 41.1)
-
Step 300
300
#DDB7A9
oklch(80.9% 0.048 41.2)
-
Step 400
400
#CB907C
oklch(70.6% 0.078 39.5)
-
Step 500
500
#BC745A
oklch(63% 0.099 40.6)
-
Step 600
600
#A85B40
oklch(55.6% 0.109 39.9)
-
Step 700
700
#904B32
oklch(49.2% 0.101 40.3)
-
Step 800
800
#753E2A
oklch(42.8% 0.083 40.5)
-
Step 900
900 (this color)
#643A2B
oklch(39.6% 0.065 40.3)
-
Step 950
950
#371F17
oklch(26.9% 0.04 39.2)
#643A2B 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) | #453F2A | 0.059 |
| Deuteranopia (no green cones) | #4F482B | 0.055 |
| Tritanopia (no blue cones) | #6D3336 | 0.033 |
| Achromatopsia (no color) | #454545 | 0.065 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #643A2B
#643A2B
oklch(39.6% 0.065 40.3)
- #124E5F
#124E5F
oklch(39.5% 0.065 221.4)
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 #643A2B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Purple Brown #673A3F ΔE 0.032
- Chestnut #742802 ΔE 0.052
- Mud Brown #60460F ΔE 0.054
- Brownish Purple #76424E ΔE 0.065
- Charcoal Grey #3C4142 ΔE 0.076
- Red Brown #8B2E16 ΔE 0.079
- Rust Brown #8B3103 ΔE 0.080
- Reddy Brown #6E1005 ΔE 0.081
Use #643A2B 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.