#643526
Closest named color: Purple Brown (#673A3F). oklch(38.5% 0.072 38.4), rgb(100, 53, 38).
Aa
White text reads best on this color (10.10:1).
About this color
#643526 is a dark, moderately saturated red. In OKLCH its lightness is 39%, its chroma 0.072 and its hue 38°. Its hue sits on the warm side of the wheel. The nearest named color is Purple Brown (#673A3F), ΔE 0.037 away. White text reads best on it, at 10.10:1.
| Hue family | Reds |
| Lightness | dark (39%) |
| Chroma | moderately saturated (0.072) |
| Temperature | warm |
| Nearest name | Purple Brown (#673A3F) |
| Black text | 2.07:1 |
| White text | 10.10:1 |
Values
| HEX | #643526 |
| RGB | rgb(100, 53, 38) |
| HSL | hsl(15, 45%, 27%) |
| OKLCH | oklch(38.5% 0.072 38.4) |
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 #643526 | 10.10:1 | AAA | Lc -97.3 | Preferred for body text |
| Black text on #643526 | 2.07:1 | Fails | Lc 10.8 | Not readable |
| #643526 text on white | 10.10:1 | AAA | Lc 93.2 | Preferred for body text |
| #643526 text on black | 2.07:1 | Fails | Lc -9.3 | 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
#FAF4F2
oklch(97.1% 0.007 39.5)
-
Step 100
100
#F4E7E2
oklch(93.7% 0.016 42.4)
-
Step 200
200
#ECD3CB
oklch(88.5% 0.03 38.6)
-
Step 300
300
#E1B5A8
oklch(80.9% 0.055 37.1)
-
Step 400
400
#D08E79
oklch(70.7% 0.087 38.4)
-
Step 500
500
#C27056
oklch(63% 0.111 38.3)
-
Step 600
600
#AD573B
oklch(55.5% 0.12 38.6)
-
Step 700
700
#95472E
oklch(49.2% 0.112 38.3)
-
Step 800
800
#793B27
oklch(42.8% 0.092 38.5)
-
Step 900
900 (this color)
#643526
oklch(38.5% 0.072 38.4)
-
Step 950
950
#391E15
oklch(26.9% 0.045 39.2)
#643526 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) | #413C25 | 0.069 |
| Deuteranopia (no green cones) | #4C4625 | 0.065 |
| Tritanopia (no blue cones) | #6D2D31 | 0.034 |
| Achromatopsia (no color) | #424242 | 0.072 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #643526
#643526
oklch(38.5% 0.072 38.4)
- #004C5C
#004C5C
oklch(38.5% 0.069 218.1)
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 #643526, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Purple Brown #673A3F ΔE 0.037
- Chestnut #742802 ΔE 0.044
- Mud Brown #60460F ΔE 0.061
- Reddy Brown #6E1005 ΔE 0.069
- Brownish Purple #76424E ΔE 0.073
- Red Brown #8B2E16 ΔE 0.079
- Charcoal Grey #3C4142 ΔE 0.080
- Rust Brown #8B3103 ΔE 0.081
Use #643526 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.