#551EB9
Closest named color: Chrysanthemum (#560BAD). oklch(42.6% 0.216 289.7), rgb(85, 30, 185).
Aa
White text reads best on this color (9.24:1).
About this color
#551EB9 is a dark, vivid purple. In OKLCH its lightness is 43%, its chroma 0.216 and its hue 290°. Its hue sits on the cool side of the wheel. The nearest named color is Chrysanthemum (#560BAD), ΔE 0.029 away. White text reads best on it, at 9.24:1.
| Hue family | Purples |
| Lightness | dark (43%) |
| Chroma | vivid (0.216) |
| Temperature | cool |
| Nearest name | Chrysanthemum (#560BAD) |
| Black text | 2.27:1 |
| White text | 9.24:1 |
Values
| HEX | #551EB9 |
| RGB | rgb(85, 30, 185) |
| HSL | hsl(261, 72%, 42%) |
| OKLCH | oklch(42.6% 0.216 289.7) |
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 #551EB9 | 9.24:1 | AAA | Lc -94.4 | Preferred for body text |
| Black text on #551EB9 | 2.27:1 | Fails | Lc 14.0 | Not readable |
| #551EB9 text on white | 9.24:1 | AAA | Lc 90.0 | Fine for body text |
| #551EB9 text on black | 2.27:1 | Fails | Lc -12.3 | 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
#F5F4FF
oklch(97.1% 0.015 290.3)
-
Step 100
100
#E9E7FF
oklch(93.7% 0.032 289.6)
-
Step 200
200
#D8D3FF
oklch(88.5% 0.06 290.3)
-
Step 300
300
#BFB6FF
oklch(81% 0.102 289.6)
-
Step 400
400
#A08CFF
oklch(70.8% 0.164 289.5)
-
Step 500
500
#8C68FF
oklch(63.1% 0.214 289.8)
-
Step 600
600
#7B3AFF
oklch(55.6% 0.265 289.8)
-
Step 700
700
#691DE6
oklch(49.1% 0.261 289.5)
-
Step 800
800 (this color)
#551EB9
oklch(42.6% 0.216 289.7)
-
Step 900
900
#452492
oklch(37.7% 0.168 289.5)
-
Step 950
950
#281756
oklch(27% 0.107 289.6)
#551EB9 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) | #004ABD | 0.108 |
| Deuteranopia (no green cones) | #0044B6 | 0.103 |
| Tritanopia (no blue cones) | #2D4E6E | 0.172 |
| Achromatopsia (no color) | #474747 | 0.218 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #551EB9
#551EB9
oklch(42.6% 0.216 289.7)
- #525200
#525200
oklch(42.5% 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 #551EB9, closest first.
No curated palette has a color within ΔE 0.04 of #551EB9.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Chrysanthemum #560BAD ΔE 0.029
- Violet Blue #510AC9 ΔE 0.030
- Purple Blue #5D21D0 ΔE 0.040
- Imperial Purple #480CA8 ΔE 0.045
- Blue With A Hint Of Purple #533CC6 ΔE 0.053
- Blurple #5539CC ΔE 0.054
- Indigo Blue #3A18B1 ΔE 0.054
- Majorelle Blue #3F37C9 ΔE 0.058
Use #551EB9 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.