#643F2A
Closest named color: Purple Brown (#673A3F). oklch(40.6% 0.061 49.9), rgb(100, 63, 42).
Aa
White text reads best on this color (9.18:1).
About this color
#643F2A is a dark, muted brown. In OKLCH its lightness is 41%, its chroma 0.061 and its hue 50°. 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 9.18:1.
| Hue family | Browns |
| Lightness | dark (41%) |
| Chroma | muted (0.061) |
| Temperature | warm |
| Nearest name | Purple Brown (#673A3F) |
| Black text | 2.28:1 |
| White text | 9.18:1 |
Values
| HEX | #643F2A |
| RGB | rgb(100, 63, 42) |
| HSL | hsl(22, 41%, 28%) |
| OKLCH | oklch(40.6% 0.061 49.9) |
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 #643F2A | 9.18:1 | AAA | Lc -95.4 | Preferred for body text |
| Black text on #643F2A | 2.28:1 | Fails | Lc 13.0 | Not readable |
| #643F2A text on white | 9.18:1 | AAA | Lc 91.0 | Preferred for body text |
| #643F2A text on black | 2.28:1 | Fails | Lc -11.3 | 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 800.
-
Step 50
50
#F8F5F3
oklch(97.2% 0.004 56.4)
-
Step 100
100
#F0E8E4
oklch(93.6% 0.01 48.6)
-
Step 200
200
#E5D6CE
oklch(88.6% 0.02 50.1)
-
Step 300
300
#D5BAAC
oklch(80.8% 0.037 49.2)
-
Step 400
400
#BF9781
oklch(70.8% 0.057 50.2)
-
Step 500
500
#AE7D61
oklch(63.2% 0.073 50.7)
-
Step 600
600
#996548
oklch(55.6% 0.08 49.7)
-
Step 700
700
#835439
oklch(49.2% 0.075 50.2)
-
Step 800
800 (this color)
#643F2A
oklch(40.6% 0.061 49.9)
-
Step 900
900
#563A2A
oklch(37.6% 0.048 50.6)
-
Step 950
950
#332219
oklch(27% 0.031 48.9)
#643F2A 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) | #494328 | 0.051 |
| Deuteranopia (no green cones) | #524B2A | 0.047 |
| Tritanopia (no blue cones) | #6D383A | 0.039 |
| Achromatopsia (no color) | #484848 | 0.062 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #643F2A
#643F2A
oklch(40.6% 0.061 49.9)
- #204F64
#204F64
oklch(40.5% 0.062 230.2)
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 #643F2A, 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 0.041
- Chestnut #742802 ΔE 0.059
- Brownish Purple #76424E ΔE 0.065
- Green Brown #544E03 ΔE 0.072
- Milk Chocolate #7F4E1E ΔE 0.073
- Charcoal Grey #3C4142 ΔE 0.076
- Olive Brown #645403 ΔE 0.078
Use #643F2A 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.