#A551BB
Closest named color: Amethyst (#9B5FC0). oklch(58.1% 0.175 318.9), rgb(165, 81, 187).
Aa
White text reads best on this color (4.67:1).
About this color
#A551BB is a medium-dark, vivid purple. In OKLCH its lightness is 58%, its chroma 0.175 and its hue 319°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Amethyst (#9B5FC0), ΔE 0.033 away. White text reads best on it, at 4.67:1.
| Hue family | Purples |
| Lightness | medium-dark (58%) |
| Chroma | vivid (0.175) |
| Temperature | in between |
| Nearest name | Amethyst (#9B5FC0) |
| Black text | 4.49:1 |
| White text | 4.67:1 |
Values
| HEX | #A551BB |
| RGB | rgb(165, 81, 187) |
| HSL | hsl(288, 44%, 53%) |
| OKLCH | oklch(58.1% 0.175 318.9) |
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 #A551BB | 4.67:1 | AA | Lc -77.4 | Fine for body text |
| Black text on #A551BB | 4.49:1 | AA large text | Lc 32.1 | Non-text elements, placeholder text |
| #A551BB text on white | 4.67:1 | AA | Lc 72.0 | Content text, not long reading |
| #A551BB text on black | 4.49:1 | AA large text | Lc -29.7 | 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 600.
-
Step 50
50
#F9F3FA
oklch(97.1% 0.011 321.3)
-
Step 100
100
#F1E5F4
oklch(93.6% 0.024 319.5)
-
Step 200
200
#E6D0EC
oklch(88.4% 0.045 319)
-
Step 300
300
#D7B1E1
oklch(80.9% 0.078 319.2)
-
Step 400
400
#C286D2
oklch(70.7% 0.126 319)
-
Step 500
500
#B265C7
oklch(63.1% 0.162 318.7)
-
Step 600
600 (this color)
#A551BB
oklch(58.1% 0.175 318.9)
-
Step 700
700
#863A9A
oklch(49.1% 0.163 318.7)
-
Step 800
800
#6D317D
oklch(42.7% 0.134 318.7)
-
Step 900
900
#592C64
oklch(37.7% 0.105 319.5)
-
Step 950
950
#341A3B
oklch(26.9% 0.068 318.8)
#A551BB 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) | #3A6EBE | 0.164 |
| Deuteranopia (no green cones) | #5777B8 | 0.145 |
| Tritanopia (no blue cones) | #A5617E | 0.111 |
| Achromatopsia (no color) | #747474 | 0.177 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #A551BB
#A551BB
oklch(58.1% 0.175 318.9)
- #399112
#399112
oklch(58% 0.175 138.8)
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 #A551BB, closest first.
No curated palette has a color within ΔE 0.04 of #A551BB.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Amethyst #9B5FC0 ΔE 0.033
- Purply #983FB2 ΔE 0.046
- Deep Lavender #8D5EB7 ΔE 0.049
- Medium Orchid #BA55D3 ΔE 0.053
- Pinky Purple #C94CBE ΔE 0.067
- Deep Lilac #966EBD ΔE 0.068
- Purpley Pink #C83CB9 ΔE 0.069
- Dark Orchid #9932CC ΔE 0.070
Use #A551BB 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.