#51499E
Closest named color: Blueberry (#464196). oklch(45.9% 0.133 284.1), rgb(81, 73, 158).
Aa
White text reads best on this color (7.50:1).
About this color
#51499E is a medium-dark, moderately saturated purple. In OKLCH its lightness is 46%, its chroma 0.133 and its hue 284°. Its hue sits on the cool side of the wheel. The nearest named color is Blueberry (#464196), ΔE 0.031 away. White text reads best on it, at 7.50:1.
| Hue family | Purples |
| Lightness | medium-dark (46%) |
| Chroma | moderately saturated (0.133) |
| Temperature | cool |
| Nearest name | Blueberry (#464196) |
| Black text | 2.79:1 |
| White text | 7.50:1 |
Values
| HEX | #51499E |
| RGB | rgb(81, 73, 158) |
| HSL | hsl(246, 37%, 45%) |
| OKLCH | oklch(45.9% 0.133 284.1) |
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 #51499E | 7.50:1 | AAA | Lc -90.7 | Preferred for body text |
| Black text on #51499E | 2.79:1 | Fails | Lc 18.2 | Dividers and decoration only |
| #51499E text on white | 7.50:1 | AAA | Lc 85.9 | Fine for body text |
| #51499E text on black | 2.79:1 | Fails | Lc -16.2 | Dividers and decoration only |
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
#F4F5FC
oklch(97.1% 0.009 279.7)
-
Step 100
100
#E8E8F9
oklch(93.6% 0.023 286)
-
Step 200
200
#D5D6F6
oklch(88.5% 0.044 284)
-
Step 300
300
#BABAF2
oklch(80.8% 0.079 284.5)
-
Step 400
400
#9895EB
oklch(70.7% 0.124 284.3)
-
Step 500
500
#8078E5
oklch(63.1% 0.16 284.2)
-
Step 600
600
#6B5ED3
oklch(55.6% 0.174 284.3)
-
Step 700
700
#594DB7
oklch(49.1% 0.161 283.9)
-
Step 800
800 (this color)
#51499E
oklch(45.9% 0.133 284.1)
-
Step 900
900
#3C3776
oklch(37.7% 0.104 283.8)
-
Step 950
950
#232145
oklch(27% 0.065 283.6)
#51499E 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) | #1D57A1 | 0.064 |
| Deuteranopia (no green cones) | #19529C | 0.064 |
| Tritanopia (no blue cones) | #365C6C | 0.114 |
| Achromatopsia (no color) | #555555 | 0.134 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51499E
#51499E
oklch(45.9% 0.133 284.1)
- #615A00
#615A00
oklch(46% 0.097 104.3)
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 #51499E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blueberry #464196 ΔE 0.031
- Twilight #4E518B ΔE 0.041
- Dark Slate Blue #483D8B ΔE 0.045
- Rebecca Purple #663399 ΔE 0.059
- Denim Blue #3B5B92 ΔE 0.061
- Dusk #4E5481 ΔE 0.061
- Dusky Blue #475F94 ΔE 0.065
- Dusk Blue #26538D ΔE 0.066
Use #51499E 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.