#643013
Closest named color: Chestnut (#742802). oklch(37.3% 0.085 47.1), rgb(100, 48, 19).
Aa
White text reads best on this color (10.63:1).
About this color
#643013 is a dark, moderately saturated brown. In OKLCH its lightness is 37%, its chroma 0.085 and its hue 47°. Its hue sits on the warm side of the wheel. The nearest named color is Chestnut (#742802), ΔE 0.034 away. White text reads best on it, at 10.63:1.
| Hue family | Browns |
| Lightness | dark (37%) |
| Chroma | moderately saturated (0.085) |
| Temperature | warm |
| Nearest name | Chestnut (#742802) |
| Black text | 1.97:1 |
| White text | 10.63:1 |
Values
| HEX | #643013 |
| RGB | rgb(100, 48, 19) |
| HSL | hsl(21, 68%, 23%) |
| OKLCH | oklch(37.3% 0.085 47.1) |
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 #643013 | 10.63:1 | AAA | Lc -98.3 | Preferred for body text |
| Black text on #643013 | 1.97:1 | Fails | Lc 9.7 | Not readable |
| #643013 text on white | 10.63:1 | AAA | Lc 94.3 | Preferred for body text |
| #643013 text on black | 1.97:1 | Fails | Lc -8.3 | 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
#FBF4F1
oklch(97.2% 0.009 44.9)
-
Step 100
100
#F5E6E0
oklch(93.5% 0.018 43.2)
-
Step 200
200
#EED3C6
oklch(88.6% 0.035 47.4)
-
Step 300
300
#E4B59E
oklch(80.9% 0.063 47.4)
-
Step 400
400
#D58C68
oklch(70.6% 0.102 46.8)
-
Step 500
500
#C86E3D
oklch(63.1% 0.13 47.5)
-
Step 600
600
#B45318
oklch(55.6% 0.143 46.8)
-
Step 700
700
#9A4307
oklch(49% 0.132 47.1)
-
Step 800
800
#7D380D
oklch(42.7% 0.109 47.2)
-
Step 900
900 (this color)
#643013
oklch(37.3% 0.085 47.1)
-
Step 950
950
#3B1D0D
oklch(26.9% 0.054 47.4)
#643013 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) | #3F370F | 0.076 |
| Deuteranopia (no green cones) | #4B4312 | 0.070 |
| Tritanopia (no blue cones) | #6E252A | 0.048 |
| Achromatopsia (no color) | #3E3E3E | 0.086 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #643013
#643013
oklch(37.3% 0.085 47.1)
- #00485E
#00485E
oklch(37.4% 0.072 226.5)
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 #643013, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Chestnut #742802 ΔE 0.034
- Purple Brown #673A3F ΔE 0.058
- Reddy Brown #6E1005 ΔE 0.058
- Mud Brown #60460F ΔE 0.062
- Blood #770001 ΔE 0.072
- Maroon #800000 ΔE 0.078
- Red Brown #8B2E16 ΔE 0.081
- Rust Brown #8B3103 ΔE 0.082
Use #643013 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.