#51379D
Closest named color: Blueberry (#464196). oklch(42.6% 0.158 289.8), rgb(81, 55, 157).
Aa
White text reads best on this color (8.81:1).
About this color
#51379D is a dark, vivid purple. In OKLCH its lightness is 43%, its chroma 0.158 and its hue 290°. Its hue sits on the cool side of the wheel. The nearest named color is Blueberry (#464196), ΔE 0.030 away. White text reads best on it, at 8.81:1.
| Hue family | Purples |
| Lightness | dark (43%) |
| Chroma | vivid (0.158) |
| Temperature | cool |
| Nearest name | Blueberry (#464196) |
| Black text | 2.38:1 |
| White text | 8.81:1 |
Values
| HEX | #51379D |
| RGB | rgb(81, 55, 157) |
| HSL | hsl(255, 48%, 42%) |
| OKLCH | oklch(42.6% 0.158 289.8) |
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 #51379D | 8.81:1 | AAA | Lc -94.2 | Preferred for body text |
| Black text on #51379D | 2.38:1 | Fails | Lc 14.3 | Not readable |
| #51379D text on white | 8.81:1 | AAA | Lc 89.7 | Fine for body text |
| #51379D text on black | 2.38:1 | Fails | Lc -12.6 | 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
#F5F4FD
oklch(97% 0.012 291.3)
-
Step 100
100
#E9E7FB
oklch(93.5% 0.027 290.5)
-
Step 200
200
#D8D4F9
oklch(88.5% 0.051 290.3)
-
Step 300
300
#BFB7F9
oklch(80.9% 0.093 289.7)
-
Step 400
400
#A08FF5
oklch(70.8% 0.146 289.8)
-
Step 500
500
#8B6FF1
oklch(63.2% 0.187 289.9)
-
Step 600
600
#7652E0
oklch(55.5% 0.205 289.7)
-
Step 700
700
#6442C2
oklch(49.1% 0.189 289.8)
-
Step 800
800 (this color)
#51379D
oklch(42.6% 0.158 289.8)
-
Step 900
900
#43317D
oklch(37.7% 0.123 290.1)
-
Step 950
950
#271E49
oklch(27.1% 0.077 289.9)
#51379D 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) | #004CA0 | 0.088 |
| Deuteranopia (no green cones) | #00489B | 0.087 |
| Tritanopia (no blue cones) | #384F65 | 0.127 |
| Achromatopsia (no color) | #4A4A4A | 0.158 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51379D
#51379D
oklch(42.6% 0.158 289.8)
- #535300
#535300
oklch(42.8% 0.093 109.8)
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 #51379D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blueberry #464196 ΔE 0.030
- Dark Slate Blue #483D8B ΔE 0.036
- Rebecca Purple #663399 ΔE 0.040
- Chrysanthemum #560BAD ΔE 0.064
- Blue With A Hint Of Purple #533CC6 ΔE 0.067
- Imperial Purple #480CA8 ΔE 0.069
- Sapphire #2138AB ΔE 0.073
- Twilight #4E518B ΔE 0.075
Use #51379D 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.