#51339D
Closest named color: Blueberry (#464196). oklch(42% 0.163 290.7), rgb(81, 51, 157).
Aa
White text reads best on this color (9.08:1).
About this color
#51339D is a dark, vivid purple. In OKLCH its lightness is 42%, its chroma 0.163 and its hue 291°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Blueberry (#464196), ΔE 0.037 away. White text reads best on it, at 9.08:1.
| Hue family | Purples |
| Lightness | dark (42%) |
| Chroma | vivid (0.163) |
| Temperature | in between |
| Nearest name | Blueberry (#464196) |
| Black text | 2.31:1 |
| White text | 9.08:1 |
Values
| HEX | #51339D |
| RGB | rgb(81, 51, 157) |
| HSL | hsl(257, 51%, 41%) |
| OKLCH | oklch(42% 0.163 290.7) |
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 #51339D | 9.08:1 | AAA | Lc -94.8 | Preferred for body text |
| Black text on #51339D | 2.31:1 | Fails | Lc 13.6 | Not readable |
| #51339D text on white | 9.08:1 | AAA | Lc 90.4 | Preferred for body text |
| #51339D text on black | 2.31:1 | Fails | Lc -11.9 | 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
#D8D4FA
oklch(88.5% 0.052 290.1)
-
Step 300
300
#C0B6FA
oklch(80.9% 0.095 290.8)
-
Step 400
400
#A18DF8
oklch(70.6% 0.153 290.5)
-
Step 500
500
#8D6DF4
oklch(63.2% 0.194 290.7)
-
Step 600
600
#7950E3
oklch(55.7% 0.211 290.7)
-
Step 700
700
#663FC5
oklch(49.2% 0.197 290.7)
-
Step 800
800 (this color)
#51339D
oklch(42% 0.163 290.7)
-
Step 900
900
#44307E
oklch(37.7% 0.126 290.9)
-
Step 950
950
#271D4A
oklch(27% 0.08 290.2)
#51339D 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) | #004AA0 | 0.091 |
| Deuteranopia (no green cones) | #00469B | 0.090 |
| Tritanopia (no blue cones) | #394D63 | 0.132 |
| Achromatopsia (no color) | #484848 | 0.164 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51339D
#51339D
oklch(42% 0.163 290.7)
- #505100
#505100
oklch(42% 0.092 110.6)
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 #51339D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blueberry #464196 ΔE 0.037
- Dark Slate Blue #483D8B ΔE 0.040
- Rebecca Purple #663399 ΔE 0.041
- Chrysanthemum #560BAD ΔE 0.056
- Imperial Purple #480CA8 ΔE 0.061
- Blue With A Hint Of Purple #533CC6 ΔE 0.069
- Indigo Blue #3A18B1 ΔE 0.071
- Sapphire #2138AB ΔE 0.073
Use #51339D 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.