#643405
Closest named color: Chestnut (#742802). oklch(37.9% 0.088 57.4), rgb(100, 52, 5).
Aa
White text reads best on this color (10.31:1).
About this color
#643405 is a dark, moderately saturated brown. In OKLCH its lightness is 38%, its chroma 0.088 and its hue 57°. Its hue sits on the warm side of the wheel. The nearest named color is Chestnut (#742802), ΔE 0.040 away. White text reads best on it, at 10.31:1.
| Hue family | Browns |
| Lightness | dark (38%) |
| Chroma | moderately saturated (0.088) |
| Temperature | warm |
| Nearest name | Chestnut (#742802) |
| Black text | 2.03:1 |
| White text | 10.31:1 |
Values
| HEX | #643405 |
| RGB | rgb(100, 52, 5) |
| HSL | hsl(30, 90%, 21%) |
| OKLCH | oklch(37.9% 0.088 57.4) |
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 #643405 | 10.31:1 | AAA | Lc -97.6 | Preferred for body text |
| Black text on #643405 | 2.03:1 | Fails | Lc 10.4 | Not readable |
| #643405 text on white | 10.31:1 | AAA | Lc 93.6 | Preferred for body text |
| #643405 text on black | 2.03:1 | Fails | Lc -9.0 | 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
#F4E7DE
oklch(93.6% 0.019 57.2)
-
Step 200
200
#EDD4C2
oklch(88.6% 0.037 58)
-
Step 300
300
#E2B797
oklch(81% 0.066 58.3)
-
Step 400
400
#D28F5C
oklch(70.6% 0.106 57.3)
-
Step 500
500
#C57227
oklch(63.2% 0.135 57.8)
-
Step 600
600
#AC5B00
oklch(55.6% 0.134 57.3)
-
Step 700
700
#914C00
oklch(49.1% 0.118 57.5)
-
Step 800
800
#783E00
oklch(42.9% 0.103 57.6)
-
Step 900
900 (this color)
#643405
oklch(37.9% 0.088 57.4)
-
Step 950
950
#3A1F07
oklch(27.1% 0.055 58.7)
#643405 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) | #423A00 | 0.069 |
| Deuteranopia (no green cones) | #4E4505 | 0.062 |
| Tritanopia (no blue cones) | #6E292C | 0.060 |
| Achromatopsia (no color) | #404040 | 0.088 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #643405
#643405
oklch(37.9% 0.088 57.4)
- #004869
#004869
oklch(38.1% 0.083 237.2)
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 #643405, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Chestnut #742802 ΔE 0.040
- Mud Brown #60460F ΔE 0.049
- Purple Brown #673A3F ΔE 0.066
- Reddy Brown #6E1005 ΔE 0.071
- Green Brown #544E03 ΔE 0.079
- Rust Brown #8B3103 ΔE 0.080
- Red Brown #8B2E16 ΔE 0.083
- Blood #770001 ΔE 0.084
Use #643405 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.