#64243B
Closest named color: Merlot (#730039). oklch(36.2% 0.096 0.7), rgb(100, 36, 59).
Aa
White text reads best on this color (11.30:1).
About this color
#64243B is a dark, moderately saturated red. In OKLCH its lightness is 36%, its chroma 0.096 and its hue 1°. 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 11.30:1.
| Hue family | Reds |
| Lightness | dark (36%) |
| Chroma | moderately saturated (0.096) |
| Temperature | warm |
| Nearest name | Merlot (#730039) |
| Black text | 1.85:1 |
| White text | 11.30:1 |
Values
| HEX | #64243B |
| RGB | rgb(100, 36, 59) |
| HSL | hsl(338, 47%, 27%) |
| OKLCH | oklch(36.2% 0.096 0.7) |
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 #64243B | 11.30:1 | AAA | Lc -99.3 | Preferred for body text |
| Black text on #64243B | 1.85:1 | Fails | Lc 8.4 | Not readable |
| #64243B text on white | 11.30:1 | AAA | Lc 95.5 | Preferred for body text |
| #64243B text on black | 1.85:1 | 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
#E9AEBE
oklch(81% 0.072 0.9)
-
Step 400
400
#DB819D
oklch(70.7% 0.115 0.5)
-
Step 500
500
#CE5E85
oklch(63% 0.147 0.3)
-
Step 600
600
#B9426E
oklch(55.6% 0.158 0.8)
-
Step 700
700
#9F325C
oklch(49% 0.148 0.6)
-
Step 800
800
#812B4B
oklch(42.6% 0.122 0.8)
-
Step 900
900 (this color)
#64243B
oklch(36.2% 0.096 0.7)
-
Step 950
950
#3D1825
oklch(26.9% 0.06 359.8)
#64243B 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 | 0.105 |
| Deuteranopia (no green cones) | #403F3A | 0.097 |
| Tritanopia (no blue cones) | #6C1E2D | 0.027 |
| Achromatopsia (no color) | #3A3A3A | 0.097 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #64243B
#64243B
oklch(36.2% 0.096 0.7)
- #00493F
#00493F
oklch(36.3% 0.066 179.7)
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 #64243B, 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 0.056
- Bordeaux #7B002C ΔE 0.058
- Burgundy #610023 ΔE 0.059
- Grape Purple #5D1451 ΔE 0.061
- Claret #680018 ΔE 0.061
- Wine Red #7B0323 ΔE 0.061
- Velvet #750851 ΔE 0.066
Use #64243B 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.