#66143B
Closest named color: Merlot (#730039). oklch(34.7% 0.12 356.7), rgb(102, 20, 59).
Aa
White text reads best on this color (12.15:1).
About this color
#66143B is a dark, moderately saturated red. In OKLCH its lightness is 35%, its chroma 0.120 and its hue 357°. Its hue sits on the warm side of the wheel. The nearest named color is Merlot (#730039), ΔE 0.030 away. White text reads best on it, at 12.15:1.
| Hue family | Reds |
| Lightness | dark (35%) |
| Chroma | moderately saturated (0.120) |
| Temperature | warm |
| Nearest name | Merlot (#730039) |
| Black text | 1.72:1 |
| White text | 12.15:1 |
Values
| HEX | #66143B |
| RGB | rgb(102, 20, 59) |
| HSL | hsl(331, 67%, 24%) |
| OKLCH | oklch(34.7% 0.12 356.7) |
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 #66143B | 12.15:1 | AAA | Lc -100.3 | Preferred for body text |
| Black text on #66143B | 1.72:1 | Fails | Lc 0.0 | Not readable |
| #66143B text on white | 12.15:1 | AAA | Lc 96.7 | Preferred for body text |
| #66143B text on black | 1.72:1 | Fails | Lc 0.0 | 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
#FDF2F5
oklch(97.1% 0.012 358.8)
-
Step 100
100
#F9E3EA
oklch(93.6% 0.026 356.3)
-
Step 200
200
#F6CCDA
oklch(88.5% 0.051 356.2)
-
Step 300
300
#F0A9C2
oklch(80.9% 0.089 356.4)
-
Step 400
400
#E677A2
oklch(70.7% 0.145 356.9)
-
Step 500
500
#DA4E8C
oklch(63% 0.184 356.3)
-
Step 600
600
#C62976
oklch(55.7% 0.2 356.6)
-
Step 700
700
#AA1963
oklch(49.1% 0.185 356.5)
-
Step 800
800
#8A1951
oklch(42.6% 0.154 356.3)
-
Step 900
900 (this color)
#66143B
oklch(34.7% 0.12 356.7)
-
Step 950
950
#421327
oklch(27.1% 0.076 357.1)
#66143B 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) | #252C3C | 0.135 |
| Deuteranopia (no green cones) | #3C3B39 | 0.120 |
| Tritanopia (no blue cones) | #6F0825 | 0.040 |
| Achromatopsia (no color) | #363636 | 0.121 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66143B
#66143B
oklch(34.7% 0.12 356.7)
- #004439
#004439
oklch(34.6% 0.064 177.4)
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 #66143B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Merlot #730039 ΔE 0.030
- Burgundy #610023 ΔE 0.043
- Grape Purple #5D1451 ΔE 0.046
- Velvet #750851 ΔE 0.050
- Bordeaux #7B002C ΔE 0.051
- Claret #680018 ΔE 0.053
- Wine #80013F ΔE 0.056
- Wine Red #7B0323 ΔE 0.058
Use #66143B 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.