#64243D
Closest named color: Merlot (#730039). oklch(36.3% 0.096 358.7), rgb(100, 36, 61).
Aa
White text reads best on this color (11.28:1).
About this color
#64243D is a dark, moderately saturated red. In OKLCH its lightness is 36%, its chroma 0.096 and its hue 359°. Its hue sits on the warm side of the wheel. The nearest named color is Merlot (#730039), ΔE 0.050 away. White text reads best on it, at 11.28:1.
| Hue family | Reds |
| Lightness | dark (36%) |
| Chroma | moderately saturated (0.096) |
| Temperature | warm |
| Nearest name | Merlot (#730039) |
| Black text | 1.86:1 |
| White text | 11.28:1 |
Values
| HEX | #64243D |
| RGB | rgb(100, 36, 61) |
| HSL | hsl(337, 47%, 27%) |
| OKLCH | oklch(36.3% 0.096 358.7) |
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 #64243D | 11.28:1 | AAA | Lc -99.3 | Preferred for body text |
| Black text on #64243D | 1.86:1 | Fails | Lc 8.4 | Not readable |
| #64243D text on white | 11.28:1 | AAA | Lc 95.5 | Preferred for body text |
| #64243D text on black | 1.86:1 | 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
#FBF3F5
oklch(97.1% 0.009 0.1)
-
Step 100
100
#F7E4E9
oklch(93.5% 0.022 359.7)
-
Step 200
200
#F1CFD8
oklch(88.6% 0.04 0.2)
-
Step 300
300
#E8AEC0
oklch(80.9% 0.071 358.4)
-
Step 400
400
#DA819F
oklch(70.7% 0.115 358.8)
-
Step 500
500
#CE5E88
oklch(63.1% 0.148 358.6)
-
Step 600
600
#B94172
oklch(55.6% 0.161 358.5)
-
Step 700
700
#9F325F
oklch(49.1% 0.149 358.8)
-
Step 800
800
#812B4E
oklch(42.7% 0.123 358.5)
-
Step 900
900 (this color)
#64243D
oklch(36.3% 0.096 358.7)
-
Step 950
950
#3D1826
oklch(26.9% 0.061 358.1)
#64243D 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) | #2F333E | 0.107 |
| Deuteranopia (no green cones) | #403F3C | 0.097 |
| Tritanopia (no blue cones) | #6C1E2E | 0.028 |
| Achromatopsia (no color) | #3B3B3B | 0.097 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #64243D
#64243D
oklch(36.3% 0.096 358.7)
- #00493E
#00493E
oklch(36.3% 0.067 178.3)
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 #64243D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Merlot #730039 ΔE 0.050
- Purple Brown #673A3F ΔE 0.057
- Grape Purple #5D1451 ΔE 0.058
- Bordeaux #7B002C ΔE 0.059
- Burgundy #610023 ΔE 0.060
- Wine Red #7B0323 ΔE 0.063
- Velvet #750851 ΔE 0.063
- Claret #680018 ΔE 0.063
Use #64243D 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.