#331021
Closest named color: Dark Plum (#3F012C). oklch(23.6% 0.061 352.5), rgb(51, 16, 33).
Aa
White text reads best on this color (16.97:1).
About this color
#331021 is a very dark, muted red. In OKLCH its lightness is 24%, its chroma 0.061 and its hue 352°. Its hue sits on the warm side of the wheel. The nearest named color is Dark Plum (#3F012C), ΔE 0.045 away. White text reads best on it, at 16.97:1.
| Hue family | Reds |
| Lightness | very dark (24%) |
| Chroma | muted (0.061) |
| Temperature | warm |
| Nearest name | Dark Plum (#3F012C) |
| Black text | 1.23:1 |
| White text | 16.97:1 |
Values
| HEX | #331021 |
| RGB | rgb(51, 16, 33) |
| HSL | hsl(331, 52%, 13%) |
| OKLCH | oklch(23.6% 0.061 352.5) |
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 #331021 | 16.97:1 | AAA | Lc -106.0 | Preferred for body text |
| Black text on #331021 | 1.23:1 | Fails | Lc 0.0 | Not readable |
| #331021 text on white | 16.97:1 | AAA | Lc 103.6 | Preferred for body text |
| #331021 text on black | 1.23:1 | 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
#FBF3F6
oklch(97.1% 0.009 352.4)
-
Step 100
100
#F6E4EB
oklch(93.5% 0.022 351.9)
-
Step 200
200
#F0CFDC
oklch(88.6% 0.041 352.2)
-
Step 300
300
#E6AEC5
oklch(80.9% 0.072 352.4)
-
Step 400
400
#D881A7
oklch(70.7% 0.116 352.8)
-
Step 500
500
#CB5F92
oklch(63.2% 0.148 352.6)
-
Step 600
600
#B6427C
oklch(55.6% 0.161 352.6)
-
Step 700
700
#9C3369
oklch(49.1% 0.15 352.3)
-
Step 800
800
#7F2C55
oklch(42.8% 0.123 352.9)
-
Step 900
900
#662846
oklch(37.6% 0.096 352.5)
-
Step 950
950 (this color)
#331021
oklch(23.6% 0.061 352.5)
#331021 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) | #151822 | 0.066 |
| Deuteranopia (no green cones) | #1E1F20 | 0.062 |
| Tritanopia (no blue cones) | #370E17 | 0.020 |
| Achromatopsia (no color) | #1C1C1C | 0.062 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #331021
#331021
oklch(23.6% 0.061 352.5)
- #00251C
#00251C
oklch(23.6% 0.045 172.7)
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 #331021, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Plum #3F012C ΔE 0.045
- Eggplant #380835 ΔE 0.046
- Aubergine #3D0734 ΔE 0.047
- Dark Maroon #3C0008 ΔE 0.048
- Deep Brown #410200 ΔE 0.060
- Dark Purple #35063E ΔE 0.063
- Very Dark Purple #2A0134 ΔE 0.064
- Jet #212529 ΔE 0.069
Use #331021 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.