#310D21
Closest named color: Dark Plum (#3F012C). oklch(22.7% 0.064 349), rgb(49, 13, 33).
Aa
White text reads best on this color (17.35:1).
About this color
#310D21 is a very dark, muted red. In OKLCH its lightness is 23%, its chroma 0.064 and its hue 349°. Its hue sits on the warm side of the wheel. The nearest named color is Dark Plum (#3F012C), ΔE 0.044 away. White text reads best on it, at 17.35:1.
| Hue family | Reds |
| Lightness | very dark (23%) |
| Chroma | muted (0.064) |
| Temperature | warm |
| Nearest name | Dark Plum (#3F012C) |
| Black text | 1.21:1 |
| White text | 17.35:1 |
Values
| HEX | #310D21 |
| RGB | rgb(49, 13, 33) |
| HSL | hsl(327, 58%, 12%) |
| OKLCH | oklch(22.7% 0.064 349) |
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 #310D21 | 17.35:1 | AAA | Lc -106.3 | Preferred for body text |
| Black text on #310D21 | 1.21:1 | Fails | Lc 0.0 | Not readable |
| #310D21 text on white | 17.35:1 | AAA | Lc 103.9 | Preferred for body text |
| #310D21 text on black | 1.21:1 | 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
#F6E4EC
oklch(93.6% 0.022 348.8)
-
Step 200
200
#F0CEDD
oklch(88.4% 0.043 349.6)
-
Step 300
300
#E7ADC8
oklch(80.9% 0.076 349.4)
-
Step 400
400
#D880AD
oklch(70.7% 0.121 348.7)
-
Step 500
500
#CC5C98
oklch(63.1% 0.157 349.2)
-
Step 600
600
#B73F83
oklch(55.7% 0.17 349)
-
Step 700
700
#9D306F
oklch(49.2% 0.158 348.9)
-
Step 800
800
#7F295A
oklch(42.6% 0.13 348.8)
-
Step 900
900
#67274A
oklch(37.7% 0.101 349.1)
-
Step 950
950 (this color)
#310D21
oklch(22.7% 0.064 349)
#310D21 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) | #111622 | 0.071 |
| Deuteranopia (no green cones) | #1B1D20 | 0.065 |
| Tritanopia (no blue cones) | #350C15 | 0.025 |
| Achromatopsia (no color) | #1A1A1A | 0.065 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #310D21
#310D21
oklch(22.7% 0.064 349)
- #002319
#002319
oklch(22.8% 0.045 169.8)
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 #310D21, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Plum #3F012C ΔE 0.044
- Eggplant #380835 ΔE 0.044
- Aubergine #3D0734 ΔE 0.047
- Dark Maroon #3C0008 ΔE 0.049
- Very Dark Purple #2A0134 ΔE 0.057
- Dark Purple #35063E ΔE 0.060
- Midnight Purple #280137 ΔE 0.063
- Deep Brown #410200 ΔE 0.064
Use #310D21 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.