#A551DD
Closest named color: Lighter Purple (#A55AF4). oklch(60.1% 0.21 309), rgb(165, 81, 221).
Aa
Black text reads best on this color (4.82:1).
About this color
#A551DD is a medium-dark, vivid purple. In OKLCH its lightness is 60%, its chroma 0.210 and its hue 309°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Lighter Purple (#A55AF4), ΔE 0.037 away. Black text reads best on it, at 4.82:1.
| Hue family | Purples |
| Lightness | medium-dark (60%) |
| Chroma | vivid (0.210) |
| Temperature | in between |
| Nearest name | Lighter Purple (#A55AF4) |
| Black text | 4.82:1 |
| White text | 4.35:1 |
Values
| HEX | #A551DD |
| RGB | rgb(165, 81, 221) |
| HSL | hsl(276, 67%, 59%) |
| OKLCH | oklch(60.1% 0.21 309) |
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 #A551DD | 4.35:1 | AA large text | Lc -75.0 | Fine for body text |
| Black text on #A551DD | 4.82:1 | AA | Lc 34.5 | Non-text elements, placeholder text |
| #A551DD text on white | 4.35:1 | AA large text | Lc 69.6 | Content text, not long reading |
| #A551DD text on black | 4.82:1 | AA | Lc -32.1 | Non-text elements, placeholder text |
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 500.
-
Step 50
50
#F8F3FD
oklch(97.1% 0.014 308.3)
-
Step 100
100
#F0E5F9
oklch(93.6% 0.029 310.1)
-
Step 200
200
#E4CFF6
oklch(88.4% 0.057 309.4)
-
Step 300
300
#D4AFF3
oklch(81% 0.102 309)
-
Step 400
400
#BE81ED
oklch(70.7% 0.163 308.8)
-
Step 500
500 (this color)
#A551DD
oklch(60.1% 0.21 309)
-
Step 600
600
#9A39D5
oklch(55.5% 0.228 309.1)
-
Step 700
700
#8429B9
oklch(49.1% 0.213 309.2)
-
Step 800
800
#6B2596
oklch(42.7% 0.176 308.9)
-
Step 900
900
#572577
oklch(37.7% 0.137 309.3)
-
Step 950
950
#331746
oklch(27% 0.087 309.2)
#A551DD 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) | #0075E1 | 0.185 |
| Deuteranopia (no green cones) | #3B7ADA | 0.164 |
| Tritanopia (no blue cones) | #9D6D90 | 0.146 |
| Achromatopsia (no color) | #797979 | 0.212 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #A551DD
#A551DD
oklch(60.1% 0.21 309)
- #629200
#629200
oklch(60.2% 0.16 129.1)
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 #A551DD, closest first.
No curated palette has a color within ΔE 0.04 of #A551DD.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Lighter Purple #A55AF4 ΔE 0.037
- Medium Orchid #BA55D3 ΔE 0.045
- Purpley #8756E4 ΔE 0.055
- Amethyst #9B5FC0 ΔE 0.057
- Dark Orchid #9932CC ΔE 0.063
- Medium Purple #9370DB ΔE 0.070
- Light Urple #B36FF6 ΔE 0.074
- Purply #983FB2 ΔE 0.076
Use #A551DD 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.