#642840
Closest named color: Purple Brown (#673A3F). oklch(37% 0.091 357.4), rgb(100, 40, 64).
Aa
White text reads best on this color (10.94:1).
About this color
#642840 is a dark, moderately saturated red. In OKLCH its lightness is 37%, its chroma 0.091 and its hue 357°. Its hue sits on the warm side of the wheel. The nearest named color is Purple Brown (#673A3F), ΔE 0.049 away. White text reads best on it, at 10.94:1.
| Hue family | Reds |
| Lightness | dark (37%) |
| Chroma | moderately saturated (0.091) |
| Temperature | warm |
| Nearest name | Purple Brown (#673A3F) |
| Black text | 1.91:1 |
| White text | 10.94:1 |
Values
| HEX | #642840 |
| RGB | rgb(100, 40, 64) |
| HSL | hsl(336, 43%, 27%) |
| OKLCH | oklch(37% 0.091 357.4) |
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 #642840 | 10.94:1 | AAA | Lc -98.8 | Preferred for body text |
| Black text on #642840 | 1.91:1 | Fails | Lc 9.1 | Not readable |
| #642840 text on white | 10.94:1 | AAA | Lc 94.9 | Preferred for body text |
| #642840 text on black | 1.91:1 | Fails | Lc -7.8 | 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
#F6E5EA
oklch(93.7% 0.02 357.6)
-
Step 200
200
#EFCFD9
oklch(88.4% 0.038 357.1)
-
Step 300
300
#E6AFC1
oklch(80.9% 0.068 357.3)
-
Step 400
400
#D783A1
oklch(70.7% 0.109 357.3)
-
Step 500
500
#CA618A
oklch(63% 0.14 357.3)
-
Step 600
600
#B54574
oklch(55.5% 0.152 357.2)
-
Step 700
700
#9C3661
oklch(49.1% 0.142 357.6)
-
Step 800
800
#7E2E4F
oklch(42.6% 0.116 357.6)
-
Step 900
900 (this color)
#642840
oklch(37% 0.091 357.4)
-
Step 950
950
#3C1927
oklch(27% 0.058 356.5)
#642840 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) | #313641 | 0.101 |
| Deuteranopia (no green cones) | #41413F | 0.092 |
| Tritanopia (no blue cones) | #6C2431 | 0.028 |
| Achromatopsia (no color) | #3D3D3D | 0.092 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #642840
#642840
oklch(37% 0.091 357.4)
- #004B3F
#004B3F
oklch(36.9% 0.068 177.3)
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 #642840, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Purple Brown #673A3F ΔE 0.049
- Merlot #730039 ΔE 0.056
- Grape Purple #5D1451 ΔE 0.061
- Bordeaux #7B002C ΔE 0.064
- Velvet #750851 ΔE 0.066
- Wine Red #7B0323 ΔE 0.067
- Wine #80013F ΔE 0.068
- Burgundy #610023 ΔE 0.069
Use #642840 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.