#643645
Closest named color: Purple Brown (#673A3F). oklch(39.5% 0.068 359.8), rgb(100, 54, 69).
Aa
White text reads best on this color (9.74:1).
About this color
#643645 is a dark, muted red. In OKLCH its lightness is 40%, its chroma 0.068 and its hue 360°. Its hue sits on the warm side of the wheel. The nearest named color is Purple Brown (#673A3F), ΔE 0.019 away. White text reads best on it, at 9.74:1.
| Hue family | Reds |
| Lightness | dark (40%) |
| Chroma | muted (0.068) |
| Temperature | warm |
| Nearest name | Purple Brown (#673A3F) |
| Black text | 2.15:1 |
| White text | 9.74:1 |
Values
| HEX | #643645 |
| RGB | rgb(100, 54, 69) |
| HSL | hsl(340, 30%, 30%) |
| OKLCH | oklch(39.5% 0.068 359.8) |
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 #643645 | 9.74:1 | AAA | Lc -96.6 | Preferred for body text |
| Black text on #643645 | 2.15:1 | Fails | Lc 11.6 | Not readable |
| #643645 text on white | 9.74:1 | AAA | Lc 92.4 | Preferred for body text |
| #643645 text on black | 2.15:1 | Fails | Lc -10.1 | 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
#FAF4F5
oklch(97.2% 0.007 5.6)
-
Step 100
100
#F3E6E9
oklch(93.6% 0.015 1.6)
-
Step 200
200
#EAD2D8
oklch(88.5% 0.028 0.7)
-
Step 300
300
#DEB3BF
oklch(80.8% 0.052 359.8)
-
Step 400
400
#CC8B9F
oklch(70.7% 0.083 359.4)
-
Step 500
500
#BD6D87
oklch(63.1% 0.106 359.7)
-
Step 600
600
#A85471
oklch(55.6% 0.115 359.6)
-
Step 700
700
#90445E
oklch(49.1% 0.107 0.1)
-
Step 800
800
#75394D
oklch(42.8% 0.087 0.3)
-
Step 900
900 (this color)
#643645
oklch(39.5% 0.068 359.8)
-
Step 950
950
#381D26
oklch(27.1% 0.044 359.1)
#643645 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) | #3D3F45 | 0.074 |
| Deuteranopia (no green cones) | #484744 | 0.069 |
| Tritanopia (no blue cones) | #6B333B | 0.020 |
| Achromatopsia (no color) | #444444 | 0.069 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #643645
#643645
oklch(39.5% 0.068 359.8)
- #095248
#095248
oklch(39.5% 0.068 180.6)
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 #643645, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Purple Brown #673A3F ΔE 0.019
- Brownish Purple #76424E ΔE 0.051
- Charcoal Grey #3C4142 ΔE 0.078
- Chestnut #742802 ΔE 0.080
- Merlot #730039 ΔE 0.085
- Bordeaux #7B002C ΔE 0.086
- Wine Red #7B0323 ΔE 0.087
- Wine #80013F ΔE 0.088
Use #643645 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.