#643C23
Closest named color: Mud Brown (#60460F). oklch(39.8% 0.068 51.7), rgb(100, 60, 35).
Aa
White text reads best on this color (9.49:1).
About this color
#643C23 is a dark, muted brown. In OKLCH its lightness is 40%, its chroma 0.068 and its hue 52°. Its hue sits on the warm side of the wheel. The nearest named color is Mud Brown (#60460F), ΔE 0.041 away. White text reads best on it, at 9.49:1.
| Hue family | Browns |
| Lightness | dark (40%) |
| Chroma | muted (0.068) |
| Temperature | warm |
| Nearest name | Mud Brown (#60460F) |
| Black text | 2.21:1 |
| White text | 9.49:1 |
Values
| HEX | #643C23 |
| RGB | rgb(100, 60, 35) |
| HSL | hsl(23, 48%, 26%) |
| OKLCH | oklch(39.8% 0.068 51.7) |
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 #643C23 | 9.49:1 | AAA | Lc -96.0 | Preferred for body text |
| Black text on #643C23 | 2.21:1 | Fails | Lc 12.2 | Not readable |
| #643C23 text on white | 9.49:1 | AAA | Lc 91.8 | Preferred for body text |
| #643C23 text on black | 2.21:1 | Fails | Lc -10.6 | 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
#F9F4F1
oklch(97% 0.007 53.4)
-
Step 100
100
#F2E7E1
oklch(93.5% 0.014 50.8)
-
Step 200
200
#E9D4C9
oklch(88.4% 0.028 49.6)
-
Step 300
300
#DCB8A3
oklch(80.9% 0.051 52)
-
Step 400
400
#CA9271
oklch(70.6% 0.082 51.5)
-
Step 500
500
#BB764C
oklch(63% 0.104 51.2)
-
Step 600
600
#A65E2E
oklch(55.6% 0.113 51.9)
-
Step 700
700
#8F4D20
oklch(49.2% 0.106 51.7)
-
Step 800
800
#743F1D
oklch(42.6% 0.088 50.9)
-
Step 900
900 (this color)
#643C23
oklch(39.8% 0.068 51.7)
-
Step 950
950
#372012
oklch(27% 0.043 51.4)
#643C23 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) | #474021 | 0.056 |
| Deuteranopia (no green cones) | #514923 | 0.050 |
| Tritanopia (no blue cones) | #6D3436 | 0.044 |
| Achromatopsia (no color) | #464646 | 0.068 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #643C23
#643C23
oklch(39.8% 0.068 51.7)
- #184D65
#184D65
oklch(39.7% 0.068 231.8)
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 #643C23, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mud Brown #60460F ΔE 0.041
- Purple Brown #673A3F ΔE 0.044
- Chestnut #742802 ΔE 0.052
- Brownish Purple #76424E ΔE 0.073
- Green Brown #544E03 ΔE 0.073
- Milk Chocolate #7F4E1E ΔE 0.077
- Rust Brown #8B3103 ΔE 0.078
- Red Brown #8B2E16 ΔE 0.079
Use #643C23 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.