#51409E
Closest named color: Blueberry (#464196). oklch(44.2% 0.146 287.1), rgb(81, 64, 158).
Aa
White text reads best on this color (8.14:1).
About this color
#51409E is a dark, vivid purple. In OKLCH its lightness is 44%, its chroma 0.146 and its hue 287°. Its hue sits on the cool side of the wheel. The nearest named color is Blueberry (#464196), ΔE 0.022 away. White text reads best on it, at 8.14:1.
| Hue family | Purples |
| Lightness | dark (44%) |
| Chroma | vivid (0.146) |
| Temperature | cool |
| Nearest name | Blueberry (#464196) |
| Black text | 2.57:1 |
| White text | 8.14:1 |
Values
| HEX | #51409E |
| RGB | rgb(81, 64, 158) |
| HSL | hsl(251, 42%, 44%) |
| OKLCH | oklch(44.2% 0.146 287.1) |
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 #51409E | 8.14:1 | AAA | Lc -92.5 | Preferred for body text |
| Black text on #51409E | 2.57:1 | Fails | Lc 16.1 | Dividers and decoration only |
| #51409E text on white | 8.14:1 | AAA | Lc 87.9 | Fine for body text |
| #51409E text on black | 2.57:1 | Fails | Lc -14.3 | 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
#E8E8FA
oklch(93.6% 0.024 285.9)
-
Step 200
200
#D6D5F8
oklch(88.5% 0.048 286.7)
-
Step 300
300
#BCB9F6
oklch(81% 0.086 286.6)
-
Step 400
400
#9C92F1
oklch(70.8% 0.137 287.2)
-
Step 500
500
#8573EC
oklch(63% 0.176 287.1)
-
Step 600
600
#7158DA
oklch(55.6% 0.19 287.4)
-
Step 700
700
#5F47BD
oklch(49% 0.177 287.4)
-
Step 800
800 (this color)
#51409E
oklch(44.2% 0.146 287.1)
-
Step 900
900
#40347A
oklch(37.7% 0.115 287.5)
-
Step 950
950
#251F47
oklch(26.9% 0.072 287.4)
#51409E 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) | #0052A1 | 0.081 |
| Deuteranopia (no green cones) | #004D9C | 0.080 |
| Tritanopia (no blue cones) | #375568 | 0.122 |
| Achromatopsia (no color) | #4F4F4F | 0.147 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51409E
#51409E
oklch(44.2% 0.146 287.1)
- #595600
#595600
oklch(44.2% 0.095 107.4)
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 #51409E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blueberry #464196 ΔE 0.022
- Dark Slate Blue #483D8B ΔE 0.035
- Rebecca Purple #663399 ΔE 0.046
- Twilight #4E518B ΔE 0.058
- Blue With A Hint Of Purple #533CC6 ΔE 0.064
- Bluey Purple #6241C7 ΔE 0.071
- Cobalt #1E488F ΔE 0.072
- Blurple #5539CC ΔE 0.074
Use #51409E 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.