#51009F
Closest named color: Imperial Purple (#480CA8). oklch(37.7% 0.206 295.8), rgb(81, 0, 159).
Aa
White text reads best on this color (11.34:1).
About this color
#51009F is a dark, vivid purple. In OKLCH its lightness is 38%, its chroma 0.206 and its hue 296°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Imperial Purple (#480CA8), ΔE 0.027 away. White text reads best on it, at 11.34:1.
| Hue family | Purples |
| Lightness | dark (38%) |
| Chroma | vivid (0.206) |
| Temperature | in between |
| Nearest name | Imperial Purple (#480CA8) |
| Black text | 1.85:1 |
| White text | 11.34:1 |
Values
| HEX | #51009F |
| RGB | rgb(81, 0, 159) |
| HSL | hsl(271, 100%, 31%) |
| OKLCH | oklch(37.7% 0.206 295.8) |
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 #51009F | 11.34:1 | AAA | Lc -98.0 | Preferred for body text |
| Black text on #51009F | 1.85:1 | Fails | Lc 10.0 | Not readable |
| #51009F text on white | 11.34:1 | AAA | Lc 93.9 | Preferred for body text |
| #51009F text on black | 1.85:1 | Fails | Lc -8.6 | 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
#F6F4FF
oklch(97.2% 0.015 294.5)
-
Step 100
100
#EBE6FF
oklch(93.6% 0.034 294.9)
-
Step 200
200
#DCD1FF
oklch(88.4% 0.064 296)
-
Step 300
300
#C6B2FF
oklch(80.8% 0.109 295.8)
-
Step 400
400
#AB86FF
oklch(70.7% 0.173 295.7)
-
Step 500
500
#9960FF
oklch(63.1% 0.225 295.8)
-
Step 600
600
#8928FF
oklch(55.6% 0.279 295.7)
-
Step 700
700
#7600E3
oklch(49.1% 0.269 295.7)
-
Step 800
800
#6100BC
oklch(42.7% 0.233 295.8)
-
Step 900
900 (this color)
#51009F
oklch(37.7% 0.206 295.8)
-
Step 950
950
#2F0B5D
oklch(27% 0.131 295.9)
#51009F 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) | #003BA3 | 0.118 |
| Deuteranopia (no green cones) | #00389D | 0.116 |
| Tritanopia (no blue cones) | #393C5B | 0.156 |
| Achromatopsia (no color) | #3A3A3A | 0.208 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51009F
#51009F
oklch(37.7% 0.206 295.8)
- #404700
#404700
oklch(37.8% 0.086 116)
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 #51009F, closest first.
No curated palette has a color within ΔE 0.04 of #51009F.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Imperial Purple #480CA8 ΔE 0.027
- Chrysanthemum #560BAD ΔE 0.028
- Indigo #4B0082 ΔE 0.051
- Indigo Blue #3A18B1 ΔE 0.060
- Violet Blue #510AC9 ΔE 0.072
- Grape #7209B7 ΔE 0.079
- Rebecca Purple #663399 ΔE 0.082
- Royal Purple #4B006E ΔE 0.085
Use #51009F 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.