#51309F
Closest named color: Blueberry (#464196). oklch(41.8% 0.169 290.9), rgb(81, 48, 159).
Aa
White text reads best on this color (9.23:1).
About this color
#51309F is a dark, vivid purple. In OKLCH its lightness is 42%, its chroma 0.169 and its hue 291°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Blueberry (#464196), ΔE 0.043 away. White text reads best on it, at 9.23:1.
| Hue family | Purples |
| Lightness | dark (42%) |
| Chroma | vivid (0.169) |
| Temperature | in between |
| Nearest name | Blueberry (#464196) |
| Black text | 2.27:1 |
| White text | 9.23:1 |
Values
| HEX | #51309F |
| RGB | rgb(81, 48, 159) |
| HSL | hsl(258, 54%, 41%) |
| OKLCH | oklch(41.8% 0.169 290.9) |
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 #51309F | 9.23:1 | AAA | Lc -95.1 | Preferred for body text |
| Black text on #51309F | 2.27:1 | Fails | Lc 13.3 | Not readable |
| #51309F text on white | 9.23:1 | AAA | Lc 90.7 | Preferred for body text |
| #51309F text on black | 2.27:1 | Fails | Lc -11.6 | 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 800.
-
Step 50
50
#F5F4FE
oklch(97.1% 0.013 290.8)
-
Step 100
100
#E9E7FC
oklch(93.6% 0.028 290.2)
-
Step 200
200
#D8D3FC
oklch(88.4% 0.056 290.8)
-
Step 300
300
#C0B6FC
oklch(80.9% 0.098 290.6)
-
Step 400
400
#A28CFB
oklch(70.7% 0.159 290.9)
-
Step 500
500
#8D6BF8
oklch(63.1% 0.202 290.6)
-
Step 600
600
#794DE7
oklch(55.6% 0.22 290.6)
-
Step 700
700
#673CC8
oklch(49.1% 0.204 291.1)
-
Step 800
800 (this color)
#51309F
oklch(41.8% 0.169 290.9)
-
Step 900
900
#442F81
oklch(37.8% 0.132 290.5)
-
Step 950
950
#281C4B
oklch(27% 0.084 291.6)
#51309F 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) | #0049A2 | 0.093 |
| Deuteranopia (no green cones) | #00459D | 0.092 |
| Tritanopia (no blue cones) | #384C64 | 0.135 |
| Achromatopsia (no color) | #474747 | 0.170 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51309F
#51309F
oklch(41.8% 0.169 290.9)
- #4F5000
#4F5000
oklch(41.6% 0.091 110.6)
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 #51309F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blueberry #464196 ΔE 0.043
- Rebecca Purple #663399 ΔE 0.043
- Dark Slate Blue #483D8B ΔE 0.046
- Chrysanthemum #560BAD ΔE 0.049
- Imperial Purple #480CA8 ΔE 0.054
- Indigo Blue #3A18B1 ΔE 0.066
- Blue With A Hint Of Purple #533CC6 ΔE 0.068
- Sapphire #2138AB ΔE 0.073
Use #51309F 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.