#51519D
Closest named color: Twilight (#4E518B). oklch(47.3% 0.12 280.8), rgb(81, 81, 157).
Aa
White text reads best on this color (6.96:1).
About this color
#51519D is a medium-dark, moderately saturated purple. In OKLCH its lightness is 47%, its chroma 0.120 and its hue 281°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight (#4E518B), ΔE 0.030 away. White text reads best on it, at 6.96:1.
| Hue family | Purples |
| Lightness | medium-dark (47%) |
| Chroma | moderately saturated (0.120) |
| Temperature | cool |
| Nearest name | Twilight (#4E518B) |
| Black text | 3.01:1 |
| White text | 6.96:1 |
Values
| HEX | #51519D |
| RGB | rgb(81, 81, 157) |
| HSL | hsl(240, 32%, 47%) |
| OKLCH | oklch(47.3% 0.12 280.8) |
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 #51519D | 6.96:1 | AA | Lc -88.9 | Fine for body text |
| Black text on #51519D | 3.01:1 | AA large text | Lc 20.1 | Dividers and decoration only |
| #51519D text on white | 6.96:1 | AA | Lc 84.0 | Fine for body text |
| #51519D text on black | 3.01:1 | AA large text | Lc -18.0 | 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 700.
-
Step 50
50
#F4F5FB
oklch(97.1% 0.008 278.6)
-
Step 100
100
#E7E9F5
oklch(93.6% 0.016 278.5)
-
Step 200
200
#D5D7EF
oklch(88.5% 0.033 281.9)
-
Step 300
300
#B9BDE6
oklch(80.9% 0.058 280.6)
-
Step 400
400
#969ADA
oklch(70.7% 0.093 281)
-
Step 500
500
#7D80D0
oklch(63.2% 0.119 280.8)
-
Step 600
600
#6768BD
oklch(55.7% 0.13 280.8)
-
Step 700
700 (this color)
#51519D
oklch(47.3% 0.12 280.8)
-
Step 800
800
#464784
oklch(42.8% 0.099 280.6)
-
Step 900
900
#3B3C6A
oklch(37.8% 0.078 281.1)
-
Step 950
950
#22233E
oklch(26.9% 0.05 280.9)
#51519D 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) | #305CA0 | 0.046 |
| Deuteranopia (no green cones) | #2B579B | 0.047 |
| Tritanopia (no blue cones) | #36616F | 0.104 |
| Achromatopsia (no color) | #595959 | 0.121 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51519D
#51519D
oklch(47.3% 0.12 280.8)
- #685D00
#685D00
oklch(47.4% 0.099 101.4)
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 #51519D, closest first.
No curated palette has a color within ΔE 0.04 of #51519D.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight #4E518B ΔE 0.030
- Denim Blue #3B5B92 ΔE 0.044
- Dusky Blue #475F94 ΔE 0.045
- Blueberry #464196 ΔE 0.048
- Dusk #4E5481 ΔE 0.049
- Dusk Blue #26538D ΔE 0.060
- Dark Slate Blue #483D8B ΔE 0.060
- Light Navy Blue #2E5A88 ΔE 0.063
Use #51519D 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.