#66243F
Closest named color: Merlot (#730039). oklch(36.7% 0.099 357.7), rgb(102, 36, 63).
Aa
White text reads best on this color (11.11:1).
About this color
#66243F is a dark, moderately saturated red. In OKLCH its lightness is 37%, its chroma 0.099 and its hue 358°. Its hue sits on the warm side of the wheel. The nearest named color is Merlot (#730039), ΔE 0.047 away. White text reads best on it, at 11.11:1.
| Hue family | Reds |
| Lightness | dark (37%) |
| Chroma | moderately saturated (0.099) |
| Temperature | warm |
| Nearest name | Merlot (#730039) |
| Black text | 1.88:1 |
| White text | 11.11:1 |
Values
| HEX | #66243F |
| RGB | rgb(102, 36, 63) |
| HSL | hsl(335, 48%, 27%) |
| OKLCH | oklch(36.7% 0.099 357.7) |
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 #66243F | 11.11:1 | AAA | Lc -99.0 | Preferred for body text |
| Black text on #66243F | 1.88:1 | Fails | Lc 8.8 | Not readable |
| #66243F text on white | 11.11:1 | AAA | Lc 95.1 | Preferred for body text |
| #66243F text on black | 1.88:1 | Fails | Lc -7.5 | 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
#FCF3F5
oklch(97.2% 0.01 2)
-
Step 100
100
#F7E4EA
oklch(93.6% 0.022 356.3)
-
Step 200
200
#F1CED9
oklch(88.4% 0.042 357.1)
-
Step 300
300
#E9ADC1
oklch(80.9% 0.074 357.1)
-
Step 400
400
#DC80A1
oklch(70.8% 0.119 357.6)
-
Step 500
500
#CF5C89
oklch(63% 0.152 357.8)
-
Step 600
600
#BA3F73
oklch(55.6% 0.165 357.9)
-
Step 700
700
#A03061
oklch(49.1% 0.154 357.6)
-
Step 800
800
#82294F
oklch(42.7% 0.127 357.7)
-
Step 900
900 (this color)
#66243F
oklch(36.7% 0.099 357.7)
-
Step 950
950
#3E1826
oklch(27.1% 0.062 358.9)
#66243F 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) | #2F3440 | 0.110 |
| Deuteranopia (no green cones) | #41403D | 0.100 |
| Tritanopia (no blue cones) | #6E1F2F | 0.030 |
| Achromatopsia (no color) | #3B3B3B | 0.100 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66243F
#66243F
oklch(36.7% 0.099 357.7)
- #004A3F
#004A3F
oklch(36.6% 0.067 178.5)
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 #66243F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Merlot #730039 ΔE 0.047
- Purple Brown #673A3F ΔE 0.056
- Bordeaux #7B002C ΔE 0.057
- Grape Purple #5D1451 ΔE 0.057
- Velvet #750851 ΔE 0.059
- Wine #80013F ΔE 0.061
- Wine Red #7B0323 ΔE 0.062
- Burgundy #610023 ΔE 0.063
Use #66243F 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.