#6556EF
Closest named color: Neon Blue (#4361EE). oklch(55.9% 0.22 281), rgb(101, 86, 239).
Aa
White text reads best on this color (5.08:1).
About this color
#6556EF is a medium-dark, vivid purple. In OKLCH its lightness is 56%, its chroma 0.220 and its hue 281°. Its hue sits on the cool side of the wheel. The nearest named color is Neon Blue (#4361EE), ΔE 0.046 away. White text reads best on it, at 5.08:1.
| Hue family | Purples |
| Lightness | medium-dark (56%) |
| Chroma | vivid (0.220) |
| Temperature | cool |
| Nearest name | Neon Blue (#4361EE) |
| Black text | 4.13:1 |
| White text | 5.08:1 |
Values
| HEX | #6556EF |
| RGB | rgb(101, 86, 239) |
| HSL | hsl(246, 83%, 64%) |
| OKLCH | oklch(55.9% 0.22 281) |
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 #6556EF | 5.08:1 | AA | Lc -79.9 | Fine for body text |
| Black text on #6556EF | 4.13:1 | AA large text | Lc 29.6 | Dividers and decoration only |
| #6556EF text on white | 5.08:1 | AA | Lc 74.5 | Content text, not long reading |
| #6556EF 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
#F3F5FF
oklch(97.2% 0.013 277.1)
-
Step 100
100
#E6E8FD
oklch(93.6% 0.028 281.5)
-
Step 200
200
#D2D6FE
oklch(88.6% 0.055 280.7)
-
Step 300
300
#B5BAFF
oklch(81% 0.097 280.8)
-
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)
#6556EF
oklch(55.9% 0.22 281)
-
Step 700
700
#5444CF
oklch(49.1% 0.204 281)
-
Step 800
800
#4439A7
oklch(42.7% 0.169 281)
-
Step 900
900
#383385
oklch(37.7% 0.133 280.6)
-
Step 950
950
#211F4E
oklch(27.1% 0.084 281.1)
#6556EF 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) | #0074F4 | 0.091 |
| Deuteranopia (no green cones) | #0069EC | 0.083 |
| Tritanopia (no blue cones) | #067D9B | 0.189 |
| Achromatopsia (no color) | #6E6E6E | 0.221 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #6556EF
#6556EF
oklch(55.9% 0.22 281)
- #837500
#837500
oklch(55.8% 0.116 101)
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 #6556EF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Neon Blue #4361EE ΔE 0.046
- Warm Blue #4B57DB ΔE 0.047
- Dark Periwinkle #665FD1 ΔE 0.051
- Light Indigo #6D5ACF ΔE 0.052
- Slate Blue #6A5ACD ΔE 0.054
- Medium Slate Blue #7B68EE ΔE 0.055
- Purpley #8756E4 ΔE 0.058
- Royal Blue #4169E1 ΔE 0.061
Use #6556EF 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.