#661D40
Closest named color: Merlot (#730039). oklch(35.9% 0.111 354.6), rgb(102, 29, 64).
Aa
White text reads best on this color (11.57:1).
About this color
#661D40 is a dark, moderately saturated red. In OKLCH its lightness is 36%, its chroma 0.111 and its hue 355°. Its hue sits on the warm side of the wheel. The nearest named color is Merlot (#730039), ΔE 0.037 away. White text reads best on it, at 11.57:1.
| Hue family | Reds |
| Lightness | dark (36%) |
| Chroma | moderately saturated (0.111) |
| Temperature | warm |
| Nearest name | Merlot (#730039) |
| Black text | 1.81:1 |
| White text | 11.57:1 |
Values
| HEX | #661D40 |
| RGB | rgb(102, 29, 64) |
| HSL | hsl(331, 56%, 26%) |
| OKLCH | oklch(35.9% 0.111 354.6) |
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 #661D40 | 11.57:1 | AAA | Lc -99.6 | Preferred for body text |
| Black text on #661D40 | 1.81:1 | Fails | Lc 8.1 | Not readable |
| #661D40 text on white | 11.57:1 | AAA | Lc 95.8 | Preferred for body text |
| #661D40 text on black | 1.81:1 | 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
#FCF3F6
oklch(97.2% 0.01 354.9)
-
Step 100
100
#F8E4EB
oklch(93.7% 0.024 354.3)
-
Step 200
200
#F3CDDB
oklch(88.5% 0.046 353.9)
-
Step 300
300
#ECABC4
oklch(80.9% 0.082 354.3)
-
Step 400
400
#E07BA5
oklch(70.6% 0.133 354.7)
-
Step 500
500
#D4568F
oklch(63.2% 0.169 354.8)
-
Step 600
600
#BF3579
oklch(55.6% 0.184 354.8)
-
Step 700
700
#A42666
oklch(49% 0.171 354.6)
-
Step 800
800
#862253
oklch(42.8% 0.142 355)
-
Step 900
900 (this color)
#661D40
oklch(35.9% 0.111 354.6)
-
Step 950
950
#3F1528
oklch(26.9% 0.07 354.6)
#661D40 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) | #2A3041 | 0.122 |
| Deuteranopia (no green cones) | #3E3E3E | 0.111 |
| Tritanopia (no blue cones) | #6E172C | 0.036 |
| Achromatopsia (no color) | #393939 | 0.111 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #661D40
#661D40
oklch(35.9% 0.111 354.6)
- #00483A
#00483A
oklch(35.8% 0.068 174.1)
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 #661D40, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Merlot #730039 ΔE 0.037
- Grape Purple #5D1451 ΔE 0.046
- Velvet #750851 ΔE 0.049
- Bordeaux #7B002C ΔE 0.055
- Burgundy #610023 ΔE 0.056
- Wine #80013F ΔE 0.057
- Rich Purple #720058 ΔE 0.060
- Red Purple #820747 ΔE 0.061
Use #661D40 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.