#66243B
Closest named color: Merlot (#730039). oklch(36.6% 0.098 1.5), rgb(102, 36, 59).
Aa
White text reads best on this color (11.16:1).
About this color
#66243B is a dark, moderately saturated red. In OKLCH its lightness is 37%, its chroma 0.098 and its hue 2°. Its hue sits on the warm side of the wheel. The nearest named color is Merlot (#730039), ΔE 0.048 away. White text reads best on it, at 11.16:1.
| Hue family | Reds |
| Lightness | dark (37%) |
| Chroma | moderately saturated (0.098) |
| Temperature | warm |
| Nearest name | Merlot (#730039) |
| Black text | 1.88:1 |
| White text | 11.16:1 |
Values
| HEX | #66243B |
| RGB | rgb(102, 36, 59) |
| HSL | hsl(339, 48%, 27%) |
| OKLCH | oklch(36.6% 0.098 1.5) |
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 #66243B | 11.16:1 | AAA | Lc -99.1 | Preferred for body text |
| Black text on #66243B | 1.88:1 | Fails | Lc 8.7 | Not readable |
| #66243B text on white | 11.16:1 | AAA | Lc 95.2 | Preferred for body text |
| #66243B text on black | 1.88:1 | Fails | Lc -7.4 | 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
#F7E4E9
oklch(93.5% 0.022 359.7)
-
Step 200
200
#F2CFD7
oklch(88.6% 0.041 2.5)
-
Step 300
300
#EAADBD
oklch(80.9% 0.074 1.6)
-
Step 400
400
#DC809B
oklch(70.6% 0.117 1.7)
-
Step 500
500
#D05D83
oklch(63.1% 0.15 1.6)
-
Step 600
600
#BB406D
oklch(55.6% 0.162 1.4)
-
Step 700
700
#A1305B
oklch(49.1% 0.152 1.3)
-
Step 800
800
#832A4A
oklch(42.8% 0.125 1.8)
-
Step 900
900 (this color)
#66243B
oklch(36.6% 0.098 1.5)
-
Step 950
950
#3E1824
oklch(27% 0.061 2.1)
#66243B 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) | #30333C | 0.109 |
| Deuteranopia (no green cones) | #424039 | 0.099 |
| Tritanopia (no blue cones) | #6F1D2D | 0.028 |
| Achromatopsia (no color) | #3B3B3B | 0.099 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66243B
#66243B
oklch(36.6% 0.098 1.5)
- #004A41
#004A41
oklch(36.7% 0.066 181.3)
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 #66243B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Merlot #730039 ΔE 0.048
- Purple Brown #673A3F ΔE 0.054
- Bordeaux #7B002C ΔE 0.055
- Wine Red #7B0323 ΔE 0.058
- Burgundy #610023 ΔE 0.060
- Claret #680018 ΔE 0.061
- Wine #80013F ΔE 0.063
- Grape Purple #5D1451 ΔE 0.063
Use #66243B 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.