#640D3E
Closest named color: Merlot (#730039). oklch(33.9% 0.127 352.3), rgb(100, 13, 62).
Aa
White text reads best on this color (12.58:1).
About this color
#640D3E is a dark, moderately saturated red. In OKLCH its lightness is 34%, its chroma 0.127 and its hue 352°. Its hue sits on the warm side of the wheel. The nearest named color is Merlot (#730039), ΔE 0.034 away. White text reads best on it, at 12.58:1.
| Hue family | Reds |
| Lightness | dark (34%) |
| Chroma | moderately saturated (0.127) |
| Temperature | warm |
| Nearest name | Merlot (#730039) |
| Black text | 1.66:1 |
| White text | 12.58:1 |
Values
| HEX | #640D3E |
| RGB | rgb(100, 13, 62) |
| HSL | hsl(326, 77%, 22%) |
| OKLCH | oklch(33.9% 0.127 352.3) |
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 #640D3E | 12.58:1 | AAA | Lc -100.8 | Preferred for body text |
| Black text on #640D3E | 1.66:1 | Fails | Lc 0.0 | Not readable |
| #640D3E text on white | 12.58:1 | AAA | Lc 97.2 | Preferred for body text |
| #640D3E text on black | 1.66:1 | 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
#FDF2F6
oklch(97.1% 0.013 353.1)
-
Step 100
100
#FAE3EC
oklch(93.7% 0.028 352)
-
Step 200
200
#F6CBDC
oklch(88.4% 0.053 352.5)
-
Step 300
300
#F1A7C7
oklch(80.8% 0.096 351.9)
-
Step 400
400
#E675AA
oklch(70.7% 0.151 352.2)
-
Step 500
500
#DC4A95
oklch(63.2% 0.195 352.4)
-
Step 600
600
#C7217F
oklch(55.7% 0.211 352.5)
-
Step 700
700
#AB0D6B
oklch(49% 0.197 352.5)
-
Step 800
800
#8B1358
oklch(42.7% 0.163 352.1)
-
Step 900
900 (this color)
#640D3E
oklch(33.9% 0.127 352.3)
-
Step 950
950
#42122A
oklch(27% 0.08 352.8)
#640D3E 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) | #1F293F | 0.144 |
| Deuteranopia (no green cones) | #38393C | 0.126 |
| Tritanopia (no blue cones) | #6C0324 | 0.047 |
| Achromatopsia (no color) | #333333 | 0.128 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #640D3E
#640D3E
oklch(33.9% 0.127 352.3)
- #004234
#004234
oklch(33.8% 0.065 172.8)
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 #640D3E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Merlot #730039 ΔE 0.034
- Grape Purple #5D1451 ΔE 0.037
- Burgundy #610023 ΔE 0.045
- Velvet #750851 ΔE 0.048
- Rich Purple #720058 ΔE 0.054
- Bordeaux #7B002C ΔE 0.060
- Claret #680018 ΔE 0.060
- Wine #80013F ΔE 0.061
Use #640D3E 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.