#660740
Closest named color: Merlot (#730039). oklch(34% 0.134 351.2), rgb(102, 7, 64).
Aa
White text reads best on this color (12.57:1).
About this color
#660740 is a dark, moderately saturated red. In OKLCH its lightness is 34%, its chroma 0.134 and its hue 351°. Its hue sits on the warm side of the wheel. The nearest named color is Merlot (#730039), ΔE 0.032 away. White text reads best on it, at 12.57:1.
| Hue family | Reds |
| Lightness | dark (34%) |
| Chroma | moderately saturated (0.134) |
| Temperature | warm |
| Nearest name | Merlot (#730039) |
| Black text | 1.66:1 |
| White text | 12.57:1 |
Values
| HEX | #660740 |
| RGB | rgb(102, 7, 64) |
| HSL | hsl(324, 87%, 21%) |
| OKLCH | oklch(34% 0.134 351.2) |
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 #660740 | 12.57:1 | AAA | Lc -100.6 | Preferred for body text |
| Black text on #660740 | 1.66:1 | Fails | Lc 0.0 | Not readable |
| #660740 text on white | 12.57:1 | AAA | Lc 97.0 | Preferred for body text |
| #660740 text on black | 1.66:1 | 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
#FDF2F6
oklch(97.1% 0.013 353.1)
-
Step 100
100
#FAE2EC
oklch(93.5% 0.029 350.5)
-
Step 200
200
#F7CBDD
oklch(88.5% 0.055 351.8)
-
Step 300
300
#F3A6C8
oklch(80.9% 0.1 351.5)
-
Step 400
400
#E972AC
oklch(70.7% 0.16 351.4)
-
Step 500
500
#DF4498
oklch(63.2% 0.206 351.3)
-
Step 600
600
#CA1282
oklch(55.6% 0.223 351.5)
-
Step 700
700
#AD006E
oklch(49.2% 0.204 351.3)
-
Step 800
800
#8D085A
oklch(42.7% 0.172 351.1)
-
Step 900
900 (this color)
#660740
oklch(34% 0.134 351.2)
-
Step 950
950
#43102B
oklch(27% 0.084 351.6)
#660740 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) | #1D2941 | 0.152 |
| Deuteranopia (no green cones) | #38393E | 0.132 |
| Tritanopia (no blue cones) | #6F0024 | 0.052 |
| Achromatopsia (no color) | #333333 | 0.136 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #660740
#660740
oklch(34% 0.134 351.2)
- #004333
#004333
oklch(34.1% 0.067 170.5)
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 #660740, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Merlot #730039 ΔE 0.032
- Grape Purple #5D1451 ΔE 0.036
- Velvet #750851 ΔE 0.043
- Rich Purple #720058 ΔE 0.048
- Burgundy #610023 ΔE 0.049
- Wine #80013F ΔE 0.059
- Bordeaux #7B002C ΔE 0.060
- Red Purple #820747 ΔE 0.064
Use #660740 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.