#643B13
Closest named color: Mud Brown (#60460F). oklch(39.4% 0.078 60.9), rgb(100, 59, 19).
Aa
White text reads best on this color (9.64:1).
About this color
#643B13 is a dark, moderately saturated brown. In OKLCH its lightness is 39%, its chroma 0.078 and its hue 61°. Its hue sits on the warm side of the wheel. The nearest named color is Mud Brown (#60460F), ΔE 0.033 away. White text reads best on it, at 9.64:1.
| Hue family | Browns |
| Lightness | dark (39%) |
| Chroma | moderately saturated (0.078) |
| Temperature | warm |
| Nearest name | Mud Brown (#60460F) |
| Black text | 2.17:1 |
| White text | 9.64:1 |
Values
| HEX | #643B13 |
| RGB | rgb(100, 59, 19) |
| HSL | hsl(30, 68%, 23%) |
| OKLCH | oklch(39.4% 0.078 60.9) |
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 #643B13 | 9.64:1 | AAA | Lc -96.3 | Preferred for body text |
| Black text on #643B13 | 2.17:1 | Fails | Lc 11.9 | Not readable |
| #643B13 text on white | 9.64:1 | AAA | Lc 92.1 | Preferred for body text |
| #643B13 text on black | 2.17:1 | 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
#FAF4F0
oklch(97.1% 0.008 56.3)
-
Step 100
100
#F3E8DF
oklch(93.7% 0.017 62)
-
Step 200
200
#EAD5C4
oklch(88.6% 0.033 61.4)
-
Step 300
300
#DDB99B
oklch(81% 0.058 61.7)
-
Step 400
400
#CC9362
oklch(70.8% 0.095 61.1)
-
Step 500
500
#BD7733
oklch(63.2% 0.12 61.5)
-
Step 600
600
#A85E00
oklch(55.6% 0.129 60.9)
-
Step 700
700
#8E4E00
oklch(49% 0.114 60.5)
-
Step 800
800
#754000
oklch(42.8% 0.099 61.2)
-
Step 900
900 (this color)
#643B13
oklch(39.4% 0.078 60.9)
-
Step 950
950
#38200A
oklch(27% 0.05 60.4)
#643B13 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) | #483F0E | 0.055 |
| Deuteranopia (no green cones) | #514813 | 0.050 |
| Tritanopia (no blue cones) | #6E3233 | 0.057 |
| Achromatopsia (no color) | #454545 | 0.078 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #643B13
#643B13
oklch(39.4% 0.078 60.9)
- #164B6C
#164B6C
oklch(39.5% 0.078 240.6)
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 #643B13, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mud Brown #60460F ΔE 0.033
- Chestnut #742802 ΔE 0.050
- Purple Brown #673A3F ΔE 0.060
- Green Brown #544E03 ΔE 0.065
- Olive Brown #645403 ΔE 0.076
- Milk Chocolate #7F4E1E ΔE 0.078
- Rust Brown #8B3103 ΔE 0.078
- Red Brown #8B2E16 ΔE 0.081
Use #643B13 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.