#A551B4
Closest named color: Amethyst (#9B5FC0). oklch(57.7% 0.168 321.4), rgb(165, 81, 180).
Aa
White text reads best on this color (4.73:1).
About this color
#A551B4 is a medium-dark, vivid purple. In OKLCH its lightness is 58%, its chroma 0.168 and its hue 321°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Amethyst (#9B5FC0), ΔE 0.036 away. White text reads best on it, at 4.73:1.
| Hue family | Purples |
| Lightness | medium-dark (58%) |
| Chroma | vivid (0.168) |
| Temperature | in between |
| Nearest name | Amethyst (#9B5FC0) |
| Black text | 4.43:1 |
| White text | 4.73:1 |
Values
| HEX | #A551B4 |
| RGB | rgb(165, 81, 180) |
| HSL | hsl(291, 40%, 51%) |
| OKLCH | oklch(57.7% 0.168 321.4) |
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 #A551B4 | 4.73:1 | AA | Lc -77.8 | Fine for body text |
| Black text on #A551B4 | 4.43:1 | AA large text | Lc 31.7 | Non-text elements, placeholder text |
| #A551B4 text on white | 4.73:1 | AA | Lc 72.4 | Content text, not long reading |
| #A551B4 text on black | 4.43:1 | AA large text | Lc -29.3 | 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
#F1E5F3
oklch(93.5% 0.023 321.4)
-
Step 200
200
#E7D1EA
oklch(88.6% 0.041 322.2)
-
Step 300
300
#D8B1DE
oklch(80.9% 0.075 321.8)
-
Step 400
400
#C386CE
oklch(70.6% 0.122 321.3)
-
Step 500
500
#B366C1
oklch(63.1% 0.155 321.3)
-
Step 600
600 (this color)
#A551B4
oklch(57.7% 0.168 321.4)
-
Step 700
700
#873B95
oklch(49.1% 0.157 321.2)
-
Step 800
800
#6E3279
oklch(42.8% 0.129 321.2)
-
Step 900
900
#592D61
oklch(37.7% 0.1 321.3)
-
Step 950
950
#341B39
oklch(27% 0.063 320.8)
#A551B4 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) | #3F6DB7 | 0.160 |
| Deuteranopia (no green cones) | #5B76B1 | 0.141 |
| Tritanopia (no blue cones) | #A75F7B | 0.103 |
| Achromatopsia (no color) | #737373 | 0.170 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #A551B4
#A551B4
oklch(57.7% 0.168 321.4)
- #319024
#319024
oklch(57.6% 0.168 141.4)
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 #A551B4, closest first.
No curated palette has a color within ΔE 0.04 of #A551B4.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Amethyst #9B5FC0 ΔE 0.036
- Purply #983FB2 ΔE 0.046
- Deep Lavender #8D5EB7 ΔE 0.048
- Medium Orchid #BA55D3 ΔE 0.060
- Deep Lilac #966EBD ΔE 0.067
- Pinky Purple #C94CBE ΔE 0.068
- Soft Purple #A66FB5 ΔE 0.069
- Purpley Pink #C83CB9 ΔE 0.070
Use #A551B4 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.