#51216D
Closest named color: Royal Purple (#4B006E). oklch(35.6% 0.13 310.5), rgb(81, 33, 109).
Aa
White text reads best on this color (11.74:1).
About this color
#51216D is a dark, moderately saturated purple. In OKLCH its lightness is 36%, its chroma 0.130 and its hue 310°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Royal Purple (#4B006E), ΔE 0.049 away. White text reads best on it, at 11.74:1.
| Hue family | Purples |
| Lightness | dark (36%) |
| Chroma | moderately saturated (0.130) |
| Temperature | in between |
| Nearest name | Royal Purple (#4B006E) |
| Black text | 1.78:1 |
| White text | 11.74:1 |
Values
| HEX | #51216D |
| RGB | rgb(81, 33, 109) |
| HSL | hsl(278, 54%, 28%) |
| OKLCH | oklch(35.6% 0.13 310.5) |
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 #51216D | 11.74:1 | AAA | Lc -100.1 | Preferred for body text |
| Black text on #51216D | 1.78:1 | Fails | Lc 7.5 | Not readable |
| #51216D text on white | 11.74:1 | AAA | Lc 96.4 | Preferred for body text |
| #51216D text on black | 1.78:1 | 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 900.
-
Step 50
50
#F8F3FC
oklch(97.1% 0.013 310.5)
-
Step 100
100
#F0E5F8
oklch(93.6% 0.028 311.3)
-
Step 200
200
#E4D0F4
oklch(88.5% 0.053 310.1)
-
Step 300
300
#D4AFF0
oklch(80.9% 0.098 310.1)
-
Step 400
400
#BF82E8
oklch(70.7% 0.156 310.5)
-
Step 500
500
#AF5EE1
oklch(63.2% 0.199 310.5)
-
Step 600
600
#9A3ECE
oklch(55.6% 0.216 310.5)
-
Step 700
700
#842EB2
oklch(49.1% 0.201 310.8)
-
Step 800
800
#6B2990
oklch(42.7% 0.165 310.6)
-
Step 900
900 (this color)
#51216D
oklch(35.6% 0.13 310.5)
-
Step 950
950
#331844
oklch(27.1% 0.083 310.3)
#51216D 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) | #00366F | 0.115 |
| Deuteranopia (no green cones) | #17396B | 0.104 |
| Tritanopia (no blue cones) | #4D3144 | 0.089 |
| Achromatopsia (no color) | #383838 | 0.131 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51216D
#51216D
oklch(35.6% 0.13 310.5)
- #2A4500
#2A4500
oklch(35.5% 0.096 130.3)
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 #51216D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Royal Purple #4B006E ΔE 0.049
- Indigo #4B0082 ΔE 0.057
- Grape Purple #5D1451 ΔE 0.058
- Plum Purple #4E0550 ΔE 0.066
- Deep Violet #490648 ΔE 0.079
- Dark Slate Blue #483D8B ΔE 0.079
- Rich Purple #720058 ΔE 0.084
- Rebecca Purple #663399 ΔE 0.091
Use #51216D 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.