#663140
Closest named color: Purple Brown (#673A3F). oklch(38.8% 0.078 3.4), rgb(102, 49, 64).
Aa
White text reads best on this color (10.10:1).
About this color
#663140 is a dark, moderately saturated red. In OKLCH its lightness is 39%, its chroma 0.078 and its hue 3°. Its hue sits on the warm side of the wheel. The nearest named color is Purple Brown (#673A3F), ΔE 0.025 away. White text reads best on it, at 10.10:1.
| Hue family | Reds |
| Lightness | dark (39%) |
| Chroma | moderately saturated (0.078) |
| Temperature | warm |
| Nearest name | Purple Brown (#673A3F) |
| Black text | 2.07:1 |
| White text | 10.10:1 |
Values
| HEX | #663140 |
| RGB | rgb(102, 49, 64) |
| HSL | hsl(343, 35%, 30%) |
| OKLCH | oklch(38.8% 0.078 3.4) |
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 #663140 | 10.10:1 | AAA | Lc -97.3 | Preferred for body text |
| Black text on #663140 | 2.07:1 | Fails | Lc 10.8 | Not readable |
| #663140 text on white | 10.10:1 | AAA | Lc 93.1 | Preferred for body text |
| #663140 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
#FAF3F5
oklch(97% 0.008 357.8)
-
Step 100
100
#F4E5E8
oklch(93.5% 0.017 3.7)
-
Step 200
200
#EDD1D7
oklch(88.6% 0.032 3.2)
-
Step 300
300
#E2B1BD
oklch(80.8% 0.059 2.2)
-
Step 400
400
#D2889A
oklch(70.7% 0.093 3.9)
-
Step 500
500
#C46882
oklch(63% 0.12 3.1)
-
Step 600
600
#AF4E6B
oklch(55.5% 0.13 3.5)
-
Step 700
700
#963F59
oklch(49.1% 0.12 3.8)
-
Step 800
800
#7A3449
oklch(42.6% 0.1 3.4)
-
Step 900
900 (this color)
#663140
oklch(38.8% 0.078 3.4)
-
Step 950
950
#3A1B24
oklch(26.9% 0.05 2.5)
#663140 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) | #3A3B40 | 0.085 |
| Deuteranopia (no green cones) | #47453F | 0.078 |
| Tritanopia (no blue cones) | #6E2D36 | 0.022 |
| Achromatopsia (no color) | #424242 | 0.078 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #663140
#663140
oklch(38.8% 0.078 3.4)
- #005048
#005048
oklch(38.7% 0.069 183.4)
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 #663140, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Purple Brown #673A3F ΔE 0.025
- Brownish Purple #76424E ΔE 0.058
- Chestnut #742802 ΔE 0.073
- Merlot #730039 ΔE 0.074
- Bordeaux #7B002C ΔE 0.074
- Wine Red #7B0323 ΔE 0.075
- Wine #80013F ΔE 0.078
- Reddy Brown #6E1005 ΔE 0.080
Use #663140 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.