#55519F
Closest named color: Twilight (#4E518B). oklch(47.8% 0.122 283), rgb(85, 81, 159).
Aa
White text reads best on this color (6.85:1).
About this color
#55519F is a medium-dark, moderately saturated purple. In OKLCH its lightness is 48%, its chroma 0.122 and its hue 283°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight (#4E518B), ΔE 0.035 away. White text reads best on it, at 6.85:1.
| Hue family | Purples |
| Lightness | medium-dark (48%) |
| Chroma | moderately saturated (0.122) |
| Temperature | cool |
| Nearest name | Twilight (#4E518B) |
| Black text | 3.06:1 |
| White text | 6.85:1 |
Values
| HEX | #55519F |
| RGB | rgb(85, 81, 159) |
| HSL | hsl(243, 33%, 47%) |
| OKLCH | oklch(47.8% 0.122 283) |
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 #55519F | 6.85:1 | AA | Lc -88.5 | Fine for body text |
| Black text on #55519F | 3.06:1 | AA large text | Lc 20.5 | Dividers and decoration only |
| #55519F text on white | 6.85:1 | AA | Lc 83.5 | Fine for body text |
| #55519F text on black | 3.06:1 | AA large text | Lc -18.4 | 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
#E8E9F5
oklch(93.7% 0.016 282.3)
-
Step 200
200
#D5D7EF
oklch(88.5% 0.033 281.9)
-
Step 300
300
#BBBCE7
oklch(80.9% 0.06 283.9)
-
Step 400
400
#9899DA
oklch(70.7% 0.094 283)
-
Step 500
500
#807FD0
oklch(63.2% 0.12 283)
-
Step 600
600
#6A66BD
oklch(55.5% 0.132 283.3)
-
Step 700
700 (this color)
#55519F
oklch(47.8% 0.122 283)
-
Step 800
800
#484684
oklch(42.7% 0.101 282.7)
-
Step 900
900
#3C3B6A
oklch(37.7% 0.079 282.9)
-
Step 950
950
#23233E
oklch(27% 0.05 282.6)
#55519F 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) | #305DA2 | 0.052 |
| Deuteranopia (no green cones) | #2C589D | 0.052 |
| Tritanopia (no blue cones) | #3C6170 | 0.105 |
| Achromatopsia (no color) | #5A5A5A | 0.123 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #55519F
#55519F
oklch(47.8% 0.122 283)
- #685F00
#685F00
oklch(47.9% 0.101 103.1)
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 #55519F, closest first.
No curated palette has a color within ΔE 0.04 of #55519F.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight #4E518B ΔE 0.035
- Dusky Blue #475F94 ΔE 0.048
- Denim Blue #3B5B92 ΔE 0.050
- Blueberry #464196 ΔE 0.051
- Dusk #4E5481 ΔE 0.053
- Iris #6258C4 ΔE 0.064
- Dark Slate Blue #483D8B ΔE 0.064
- Dusk Blue #26538D ΔE 0.067
Use #55519F 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.