#6655F1
Closest named color: Neon Blue (#4361EE). oklch(56% 0.224 281.3), rgb(102, 85, 241).
Aa
White text reads best on this color (5.07:1).
About this color
#6655F1 is a medium-dark, vivid purple. In OKLCH its lightness is 56%, its chroma 0.224 and its hue 281°. Its hue sits on the cool side of the wheel. The nearest named color is Neon Blue (#4361EE), ΔE 0.048 away. White text reads best on it, at 5.07:1.
| Hue family | Purples |
| Lightness | medium-dark (56%) |
| Chroma | vivid (0.224) |
| Temperature | cool |
| Nearest name | Neon Blue (#4361EE) |
| Black text | 4.13:1 |
| White text | 5.07:1 |
Values
| HEX | #6655F1 |
| RGB | rgb(102, 85, 241) |
| HSL | hsl(247, 85%, 64%) |
| OKLCH | oklch(56% 0.224 281.3) |
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 #6655F1 | 5.07:1 | AA | Lc -79.9 | Fine for body text |
| Black text on #6655F1 | 4.13:1 | AA large text | Lc 29.6 | Dividers and decoration only |
| #6655F1 text on white | 5.07:1 | AA | Lc 74.5 | Content text, not long reading |
| #6655F1 text on black | 4.13:1 | AA large text | Lc -27.2 | 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
#F4F5FF
oklch(97.2% 0.013 281.6)
-
Step 100
100
#E6E8FE
oklch(93.6% 0.03 281.7)
-
Step 200
200
#D2D6FE
oklch(88.6% 0.055 280.7)
-
Step 300
300
#B5B9FF
oklch(80.8% 0.099 281.4)
-
Step 400
400
#9192FF
oklch(70.7% 0.157 281.2)
-
Step 500
500
#7972FF
oklch(63.2% 0.203 281.1)
-
Step 600
600 (this color)
#6655F1
oklch(56% 0.224 281.3)
-
Step 700
700
#5542D1
oklch(49.1% 0.209 281.5)
-
Step 800
800
#4538A9
oklch(42.7% 0.173 281.4)
-
Step 900
900
#393285
oklch(37.6% 0.134 281.6)
-
Step 950
950
#211E4E
oklch(26.9% 0.086 281.8)
#6655F1 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) | #0074F6 | 0.093 |
| Deuteranopia (no green cones) | #0069EE | 0.085 |
| Tritanopia (no blue cones) | #097D9C | 0.191 |
| Achromatopsia (no color) | #6E6E6E | 0.225 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #6655F1
#6655F1
oklch(56% 0.224 281.3)
- #837600
#837600
oklch(56% 0.117 101.7)
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 #6655F1, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Neon Blue #4361EE ΔE 0.048
- Warm Blue #4B57DB ΔE 0.050
- Dark Periwinkle #665FD1 ΔE 0.054
- Light Indigo #6D5ACF ΔE 0.055
- Medium Slate Blue #7B68EE ΔE 0.056
- Slate Blue #6A5ACD ΔE 0.057
- Purpley #8756E4 ΔE 0.058
- Purpley Blue #5F34E7 ΔE 0.063
Use #6655F1 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.