#643107
Closest named color: Chestnut (#742802). oklch(37.4% 0.089 53.4), rgb(100, 49, 7).
Aa
White text reads best on this color (10.58:1).
About this color
#643107 is a dark, moderately saturated brown. In OKLCH its lightness is 37%, its chroma 0.089 and its hue 53°. Its hue sits on the warm side of the wheel. The nearest named color is Chestnut (#742802), ΔE 0.036 away. White text reads best on it, at 10.58:1.
| Hue family | Browns |
| Lightness | dark (37%) |
| Chroma | moderately saturated (0.089) |
| Temperature | warm |
| Nearest name | Chestnut (#742802) |
| Black text | 1.98:1 |
| White text | 10.58:1 |
Values
| HEX | #643107 |
| RGB | rgb(100, 49, 7) |
| HSL | hsl(27, 87%, 21%) |
| OKLCH | oklch(37.4% 0.089 53.4) |
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 #643107 | 10.58:1 | AAA | Lc -98.1 | Preferred for body text |
| Black text on #643107 | 1.98:1 | Fails | Lc 9.8 | Not readable |
| #643107 text on white | 10.58:1 | AAA | Lc 94.1 | Preferred for body text |
| #643107 text on black | 1.98:1 | Fails | Lc -8.4 | 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
#FBF4F0
oklch(97.1% 0.009 52.1)
-
Step 100
100
#F5E7DE
oklch(93.7% 0.02 55.1)
-
Step 200
200
#EED3C3
oklch(88.5% 0.037 52.7)
-
Step 300
300
#E4B599
oklch(80.8% 0.067 52.3)
-
Step 400
400
#D58D5F
oklch(70.7% 0.107 52.8)
-
Step 500
500
#C86F2D
oklch(63.1% 0.137 53.3)
-
Step 600
600
#B05700
oklch(55.5% 0.14 53.4)
-
Step 700
700
#954900
oklch(49.2% 0.124 53.7)
-
Step 800
800
#7B3B00
oklch(42.8% 0.108 53.6)
-
Step 900
900 (this color)
#643107
oklch(37.4% 0.089 53.4)
-
Step 950
950
#3B1E08
oklch(27% 0.056 54.6)
#643107 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) | #403801 | 0.074 |
| Deuteranopia (no green cones) | #4C4306 | 0.067 |
| Tritanopia (no blue cones) | #6E2529 | 0.056 |
| Achromatopsia (no color) | #3F3F3F | 0.089 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #643107
#643107
oklch(37.4% 0.089 53.4)
- #004763
#004763
oklch(37.4% 0.077 233.1)
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 #643107, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Chestnut #742802 ΔE 0.036
- Mud Brown #60460F ΔE 0.057
- Reddy Brown #6E1005 ΔE 0.063
- Purple Brown #673A3F ΔE 0.066
- Blood #770001 ΔE 0.077
- Rust Brown #8B3103 ΔE 0.081
- Maroon #800000 ΔE 0.082
- Red Brown #8B2E16 ΔE 0.083
Use #643107 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.