#640B3F
Closest named color: Merlot (#730039). oklch(33.8% 0.129 351.4), rgb(100, 11, 63).
Aa
White text reads best on this color (12.63:1).
About this color
#640B3F is a dark, moderately saturated red. In OKLCH its lightness is 34%, its chroma 0.129 and its hue 351°. Its hue sits on the warm side of the wheel. The nearest named color is Merlot (#730039), ΔE 0.035 away. White text reads best on it, at 12.63:1.
| Hue family | Reds |
| Lightness | dark (34%) |
| Chroma | moderately saturated (0.129) |
| Temperature | warm |
| Nearest name | Merlot (#730039) |
| Black text | 1.66:1 |
| White text | 12.63:1 |
Values
| HEX | #640B3F |
| RGB | rgb(100, 11, 63) |
| HSL | hsl(325, 80%, 22%) |
| OKLCH | oklch(33.8% 0.129 351.4) |
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 #640B3F | 12.63:1 | AAA | Lc -100.8 | Preferred for body text |
| Black text on #640B3F | 1.66:1 | Fails | Lc 0.0 | Not readable |
| #640B3F text on white | 12.63:1 | AAA | Lc 97.3 | Preferred for body text |
| #640B3F 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
#F6CBDD
oklch(88.4% 0.054 351.2)
-
Step 300
300
#F2A7C8
oklch(81% 0.097 351.5)
-
Step 400
400
#E774AC
oklch(70.7% 0.155 351.3)
-
Step 500
500
#DC4897
oklch(63.1% 0.198 351.4)
-
Step 600
600
#C71D82
oklch(55.6% 0.216 351.1)
-
Step 700
700
#AC086E
oklch(49.2% 0.2 351.3)
-
Step 800
800
#8B1159
oklch(42.6% 0.165 351.4)
-
Step 900
900 (this color)
#640B3F
oklch(33.8% 0.129 351.4)
-
Step 950
950
#42112B
oklch(27% 0.082 351.2)
#640B3F 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) | #1E2940 | 0.146 |
| Deuteranopia (no green cones) | #37393D | 0.129 |
| Tritanopia (no blue cones) | #6C0224 | 0.049 |
| Achromatopsia (no color) | #333333 | 0.130 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #640B3F
#640B3F
oklch(33.8% 0.129 351.4)
- #004233
#004233
oklch(33.8% 0.066 171.5)
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 #640B3F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Merlot #730039 ΔE 0.035
- Grape Purple #5D1451 ΔE 0.035
- Burgundy #610023 ΔE 0.047
- Velvet #750851 ΔE 0.047
- Rich Purple #720058 ΔE 0.052
- Bordeaux #7B002C ΔE 0.062
- Wine #80013F ΔE 0.062
- Claret #680018 ΔE 0.063
Use #640B3F 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.