#643B19
Closest named color: Mud Brown (#60460F). oklch(39.5% 0.075 57.6), rgb(100, 59, 25).
Aa
White text reads best on this color (9.62:1).
About this color
#643B19 is a dark, moderately saturated brown. In OKLCH its lightness is 39%, its chroma 0.075 and its hue 58°. Its hue sits on the warm side of the wheel. The nearest named color is Mud Brown (#60460F), ΔE 0.036 away. White text reads best on it, at 9.62:1.
| Hue family | Browns |
| Lightness | dark (39%) |
| Chroma | moderately saturated (0.075) |
| Temperature | warm |
| Nearest name | Mud Brown (#60460F) |
| Black text | 2.18:1 |
| White text | 9.62:1 |
Values
| HEX | #643B19 |
| RGB | rgb(100, 59, 25) |
| HSL | hsl(27, 60%, 25%) |
| OKLCH | oklch(39.5% 0.075 57.6) |
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 #643B19 | 9.62:1 | AAA | Lc -96.3 | Preferred for body text |
| Black text on #643B19 | 2.18:1 | Fails | Lc 11.9 | Not readable |
| #643B19 text on white | 9.62:1 | AAA | Lc 92.1 | Preferred for body text |
| #643B19 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
#FAF4F1
oklch(97.1% 0.008 48.7)
-
Step 100
100
#F3E7E0
oklch(93.6% 0.016 52.6)
-
Step 200
200
#EAD5C6
oklch(88.6% 0.031 57.9)
-
Step 300
300
#DDB89E
oklch(80.8% 0.056 56.9)
-
Step 400
400
#CB9268
oklch(70.6% 0.089 57.1)
-
Step 500
500
#BD763D
oklch(63.1% 0.115 57.3)
-
Step 600
600
#A85D16
oklch(55.5% 0.125 57.4)
-
Step 700
700
#904D04
oklch(49.2% 0.116 58.1)
-
Step 800
800
#753F0B
oklch(42.6% 0.096 57.6)
-
Step 900
900 (this color)
#643B19
oklch(39.5% 0.075 57.6)
-
Step 950
950
#38200D
oklch(27% 0.048 57.2)
#643B19 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) | #473F15 | 0.057 |
| Deuteranopia (no green cones) | #514819 | 0.050 |
| Tritanopia (no blue cones) | #6E3234 | 0.053 |
| Achromatopsia (no color) | #454545 | 0.075 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #643B19
#643B19
oklch(39.5% 0.075 57.6)
- #154C6A
#154C6A
oklch(39.6% 0.075 237.4)
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 #643B19, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mud Brown #60460F ΔE 0.036
- Chestnut #742802 ΔE 0.049
- Purple Brown #673A3F ΔE 0.054
- Green Brown #544E03 ΔE 0.068
- Rust Brown #8B3103 ΔE 0.078
- Milk Chocolate #7F4E1E ΔE 0.078
- Olive Brown #645403 ΔE 0.078
- Red Brown #8B2E16 ΔE 0.080
Use #643B19 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.