#642839
Closest named color: Purple Brown (#673A3F). oklch(36.8% 0.088 4.7), rgb(100, 40, 57).
Aa
White text reads best on this color (11.02:1).
About this color
#642839 is a dark, moderately saturated red. In OKLCH its lightness is 37%, its chroma 0.088 and its hue 5°. Its hue sits on the warm side of the wheel. The nearest named color is Purple Brown (#673A3F), ΔE 0.046 away. White text reads best on it, at 11.02:1.
| Hue family | Reds |
| Lightness | dark (37%) |
| Chroma | moderately saturated (0.088) |
| Temperature | warm |
| Nearest name | Purple Brown (#673A3F) |
| Black text | 1.90:1 |
| White text | 11.02:1 |
Values
| HEX | #642839 |
| RGB | rgb(100, 40, 57) |
| HSL | hsl(343, 43%, 27%) |
| OKLCH | oklch(36.8% 0.088 4.7) |
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 #642839 | 11.02:1 | AAA | Lc -98.9 | Preferred for body text |
| Black text on #642839 | 1.90:1 | Fails | Lc 8.9 | Not readable |
| #642839 text on white | 11.02:1 | AAA | Lc 95.0 | Preferred for body text |
| #642839 text on black | 1.90:1 | Fails | Lc -7.6 | 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
#F6E5E8
oklch(93.6% 0.019 5.3)
-
Step 200
200
#F0D0D6
oklch(88.6% 0.037 5.1)
-
Step 300
300
#E7AFBB
oklch(80.9% 0.067 4.4)
-
Step 400
400
#D88498
oklch(70.7% 0.106 4.7)
-
Step 500
500
#CB637F
oklch(63.1% 0.135 4.7)
-
Step 600
600
#B64768
oklch(55.6% 0.147 4.7)
-
Step 700
700
#9D3757
oklch(49.1% 0.138 4.4)
-
Step 800
800
#7F2F47
oklch(42.7% 0.113 4.6)
-
Step 900
900 (this color)
#642839
oklch(36.8% 0.088 4.7)
-
Step 950
950
#3D1A23
oklch(27.2% 0.056 5.2)
#642839 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) | #333539 | 0.098 |
| Deuteranopia (no green cones) | #434038 | 0.088 |
| Tritanopia (no blue cones) | #6C222E | 0.023 |
| Achromatopsia (no color) | #3C3C3C | 0.089 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #642839
#642839
oklch(36.8% 0.088 4.7)
- #004A43
#004A43
oklch(36.8% 0.065 184.1)
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 #642839, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Purple Brown #673A3F ΔE 0.046
- Merlot #730039 ΔE 0.058
- Bordeaux #7B002C ΔE 0.062
- Wine Red #7B0323 ΔE 0.063
- Claret #680018 ΔE 0.064
- Burgundy #610023 ΔE 0.065
- Reddy Brown #6E1005 ΔE 0.066
- Grape Purple #5D1451 ΔE 0.071
Use #642839 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.