#643528
Closest named color: Purple Brown (#673A3F). oklch(38.6% 0.071 36.3), rgb(100, 53, 40).
Aa
White text reads best on this color (10.08:1).
About this color
#643528 is a dark, moderately saturated red. In OKLCH its lightness is 39%, its chroma 0.071 and its hue 36°. Its hue sits on the warm side of the wheel. The nearest named color is Purple Brown (#673A3F), ΔE 0.034 away. White text reads best on it, at 10.08:1.
| Hue family | Reds |
| Lightness | dark (39%) |
| Chroma | moderately saturated (0.071) |
| Temperature | warm |
| Nearest name | Purple Brown (#673A3F) |
| Black text | 2.08:1 |
| White text | 10.08:1 |
Values
| HEX | #643528 |
| RGB | rgb(100, 53, 40) |
| HSL | hsl(13, 43%, 27%) |
| OKLCH | oklch(38.6% 0.071 36.3) |
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 #643528 | 10.08:1 | AAA | Lc -97.3 | Preferred for body text |
| Black text on #643528 | 2.08:1 | Fails | Lc 10.8 | Not readable |
| #643528 text on white | 10.08:1 | AAA | Lc 93.1 | Preferred for body text |
| #643528 text on black | 2.08:1 | 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
#F4E7E3
oklch(93.7% 0.015 37.9)
-
Step 200
200
#ECD3CC
oklch(88.6% 0.03 36.2)
-
Step 300
300
#E1B5A9
oklch(80.9% 0.054 35.7)
-
Step 400
400
#D08E7B
oklch(70.8% 0.086 36.7)
-
Step 500
500
#C2705A
oklch(63.1% 0.109 35.9)
-
Step 600
600
#AD573F
oklch(55.6% 0.119 36.5)
-
Step 700
700
#944731
oklch(49.1% 0.11 36.8)
-
Step 800
800
#793A29
oklch(42.7% 0.093 36.1)
-
Step 900
900 (this color)
#643528
oklch(38.6% 0.071 36.3)
-
Step 950
950
#391E16
oklch(26.9% 0.045 37.3)
#643528 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) | #413C27 | 0.069 |
| Deuteranopia (no green cones) | #4C4627 | 0.065 |
| Tritanopia (no blue cones) | #6D2D32 | 0.033 |
| Achromatopsia (no color) | #424242 | 0.071 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #643528
#643528
oklch(38.6% 0.071 36.3)
- #004D5B
#004D5B
oklch(38.7% 0.068 215.2)
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 #643528, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Purple Brown #673A3F ΔE 0.034
- Chestnut #742802 ΔE 0.045
- Mud Brown #60460F ΔE 0.063
- Reddy Brown #6E1005 ΔE 0.069
- Brownish Purple #76424E ΔE 0.071
- Red Brown #8B2E16 ΔE 0.079
- Charcoal Grey #3C4142 ΔE 0.079
- Blood #770001 ΔE 0.082
Use #643528 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.