#51409A
Closest named color: Blueberry (#464196). oklch(43.9% 0.141 287.8), rgb(81, 64, 154).
Aa
White text reads best on this color (8.23:1).
About this color
#51409A is a dark, vivid purple. In OKLCH its lightness is 44%, its chroma 0.141 and its hue 288°. Its hue sits on the cool side of the wheel. The nearest named color is Blueberry (#464196), ΔE 0.019 away. White text reads best on it, at 8.23:1.
| Hue family | Purples |
| Lightness | dark (44%) |
| Chroma | vivid (0.141) |
| Temperature | cool |
| Nearest name | Blueberry (#464196) |
| Black text | 2.54:1 |
| White text | 8.23:1 |
Values
| HEX | #51409A |
| RGB | rgb(81, 64, 154) |
| HSL | hsl(251, 41%, 43%) |
| OKLCH | oklch(43.9% 0.141 287.8) |
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 #51409A | 8.23:1 | AAA | Lc -92.8 | Preferred for body text |
| Black text on #51409A | 2.54:1 | Fails | Lc 15.8 | Dividers and decoration only |
| #51409A text on white | 8.23:1 | AAA | Lc 88.2 | Fine for body text |
| #51409A text on black | 2.54:1 | Fails | Lc -14.0 | 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 800.
-
Step 50
50
#F5F4FD
oklch(97% 0.012 291.3)
-
Step 100
100
#E8E8F9
oklch(93.6% 0.023 286)
-
Step 200
200
#D7D5F6
oklch(88.5% 0.045 288.2)
-
Step 300
300
#BDB9F3
oklch(80.9% 0.081 287.6)
-
Step 400
400
#9D92EE
oklch(70.7% 0.132 288)
-
Step 500
500
#8774E8
oklch(63.1% 0.169 288.1)
-
Step 600
600
#725AD6
oklch(55.7% 0.182 287.9)
-
Step 700
700
#6049BA
oklch(49.2% 0.17 287.8)
-
Step 800
800 (this color)
#51409A
oklch(43.9% 0.141 287.8)
-
Step 900
900
#403578
oklch(37.8% 0.11 287.5)
-
Step 950
950
#251F46
oklch(26.9% 0.07 287.8)
#51409A 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) | #01519D | 0.081 |
| Deuteranopia (no green cones) | #024C98 | 0.080 |
| Tritanopia (no blue cones) | #395466 | 0.117 |
| Achromatopsia (no color) | #4F4F4F | 0.141 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51409A
#51409A
oklch(43.9% 0.141 287.8)
- #585500
#585500
oklch(43.8% 0.094 107.4)
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 #51409A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blueberry #464196 ΔE 0.019
- Dark Slate Blue #483D8B ΔE 0.030
- Rebecca Purple #663399 ΔE 0.045
- Twilight #4E518B ΔE 0.054
- Cobalt #1E488F ΔE 0.070
- Blue With A Hint Of Purple #533CC6 ΔE 0.071
- Dusk #4E5481 ΔE 0.073
- Dusk Blue #26538D ΔE 0.075
Use #51409A 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.