#3F0521
Closest named color: Dark Plum (#3F012C). oklch(24.6% 0.091 357.2), rgb(63, 5, 33).
Aa
White text reads best on this color (16.73:1).
About this color
#3F0521 is a very dark, moderately saturated red. In OKLCH its lightness is 25%, its chroma 0.091 and its hue 357°. Its hue sits on the warm side of the wheel. The nearest named color is Dark Plum (#3F012C), ΔE 0.025 away. White text reads best on it, at 16.73:1.
| Hue family | Reds |
| Lightness | very dark (25%) |
| Chroma | moderately saturated (0.091) |
| Temperature | warm |
| Nearest name | Dark Plum (#3F012C) |
| Black text | 1.25:1 |
| White text | 16.73:1 |
Values
| HEX | #3F0521 |
| RGB | rgb(63, 5, 33) |
| HSL | hsl(331, 85%, 13%) |
| OKLCH | oklch(24.6% 0.091 357.2) |
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 #3F0521 | 16.73:1 | AAA | Lc -105.4 | Preferred for body text |
| Black text on #3F0521 | 1.25:1 | Fails | Lc 0.0 | Not readable |
| #3F0521 text on white | 16.73:1 | AAA | Lc 102.9 | Preferred for body text |
| #3F0521 text on black | 1.25:1 | 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 950.
-
Step 50
50
#FEF2F5
oklch(97.1% 0.013 0.3)
-
Step 100
100
#FCE2EA
oklch(93.6% 0.03 357.1)
-
Step 200
200
#FBC9D9
oklch(88.4% 0.06 357.3)
-
Step 300
300
#F9A3C1
oklch(80.9% 0.108 357.3)
-
Step 400
400
#F16CA2
oklch(70.7% 0.172 357)
-
Step 500
500
#E8388B
oklch(63.1% 0.22 357.1)
-
Step 600
600
#CF0075
oklch(55.6% 0.227 357.1)
-
Step 700
700
#AF0062
oklch(49.1% 0.2 357.1)
-
Step 800
800
#910050
oklch(42.7% 0.174 357.2)
-
Step 900
900
#770D42
oklch(37.7% 0.143 357.5)
-
Step 950
950 (this color)
#3F0521
oklch(24.6% 0.091 357.2)
#3F0521 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) | #121722 | 0.103 |
| Deuteranopia (no green cones) | #222220 | 0.092 |
| Tritanopia (no blue cones) | #450012 | 0.029 |
| Achromatopsia (no color) | #1E1E1E | 0.091 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F0521
#3F0521
oklch(24.6% 0.091 357.2)
- #002720
#002720
oklch(24.4% 0.045 177.7)
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 #3F0521, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Plum #3F012C ΔE 0.025
- Aubergine #3D0734 ΔE 0.037
- Dark Maroon #3C0008 ΔE 0.042
- Eggplant #380835 ΔE 0.043
- Deep Brown #410200 ΔE 0.054
- Mahogany #4A0100 ΔE 0.058
- Eggplant Purple #430541 ΔE 0.061
- Dark Purple #35063E ΔE 0.063
Use #3F0521 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.