#660D40
Closest named color: Merlot (#730039). oklch(34.4% 0.129 351.8), rgb(102, 13, 64).
Aa
White text reads best on this color (12.37:1).
About this color
#660D40 is a dark, moderately saturated red. In OKLCH its lightness is 34%, its chroma 0.129 and its hue 352°. Its hue sits on the warm side of the wheel. The nearest named color is Merlot (#730039), ΔE 0.031 away. White text reads best on it, at 12.37:1.
| Hue family | Reds |
| Lightness | dark (34%) |
| Chroma | moderately saturated (0.129) |
| Temperature | warm |
| Nearest name | Merlot (#730039) |
| Black text | 1.69:1 |
| White text | 12.37:1 |
Values
| HEX | #660D40 |
| RGB | rgb(102, 13, 64) |
| HSL | hsl(326, 77%, 23%) |
| OKLCH | oklch(34.4% 0.129 351.8) |
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 #660D40 | 12.37:1 | AAA | Lc -100.5 | Preferred for body text |
| Black text on #660D40 | 1.69:1 | Fails | Lc 0.0 | Not readable |
| #660D40 text on white | 12.37:1 | AAA | Lc 96.8 | Preferred for body text |
| #660D40 text on black | 1.69:1 | 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
#FAE3EC
oklch(93.7% 0.028 352)
-
Step 200
200
#F7CBDD
oklch(88.5% 0.055 351.8)
-
Step 300
300
#F2A7C7
oklch(81% 0.097 352.2)
-
Step 400
400
#E774AB
oklch(70.7% 0.154 351.8)
-
Step 500
500
#DD4896
oklch(63.2% 0.198 352)
-
Step 600
600
#C81C81
oklch(55.6% 0.216 351.7)
-
Step 700
700
#AC066D
oklch(49.1% 0.201 351.7)
-
Step 800
800
#8C1059
oklch(42.8% 0.167 351.7)
-
Step 900
900 (this color)
#660D40
oklch(34.4% 0.129 351.8)
-
Step 950
950
#42112B
oklch(27% 0.082 351.2)
#660D40 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) | #1F2A41 | 0.147 |
| Deuteranopia (no green cones) | #393A3E | 0.128 |
| Tritanopia (no blue cones) | #6E0326 | 0.047 |
| Achromatopsia (no color) | #343434 | 0.131 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #660D40
#660D40
oklch(34.4% 0.129 351.8)
- #004435
#004435
oklch(34.4% 0.067 172)
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 #660D40, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Merlot #730039 ΔE 0.031
- Grape Purple #5D1451 ΔE 0.036
- Velvet #750851 ΔE 0.043
- Burgundy #610023 ΔE 0.049
- Rich Purple #720058 ΔE 0.049
- Wine #80013F ΔE 0.057
- Bordeaux #7B002C ΔE 0.058
- Red Purple #820747 ΔE 0.062
Use #660D40 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.