#644FF8
Closest named color: Neon Blue (#4361EE). oklch(55.5% 0.239 280.9), rgb(100, 79, 248).
Aa
White text reads best on this color (5.22:1).
About this color
#644FF8 is a medium-dark, vivid purple. In OKLCH its lightness is 56%, its chroma 0.239 and its hue 281°. Its hue sits on the cool side of the wheel. The nearest named color is Neon Blue (#4361EE), ΔE 0.053 away. White text reads best on it, at 5.22:1.
| Hue family | Purples |
| Lightness | medium-dark (56%) |
| Chroma | vivid (0.239) |
| Temperature | cool |
| Nearest name | Neon Blue (#4361EE) |
| Black text | 4.01:1 |
| White text | 5.22:1 |
Values
| HEX | #644FF8 |
| RGB | rgb(100, 79, 248) |
| HSL | hsl(247, 92%, 64%) |
| OKLCH | oklch(55.5% 0.239 280.9) |
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 #644FF8 | 5.22:1 | AA | Lc -80.6 | Fine for body text |
| Black text on #644FF8 | 4.01:1 | AA large text | Lc 28.9 | Dividers and decoration only |
| #644FF8 text on white | 5.22:1 | AA | Lc 75.2 | Fine for body text |
| #644FF8 text on black | 4.01:1 | AA large text | Lc -26.5 | 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
#E6E8FF
oklch(93.6% 0.031 281.8)
-
Step 200
200
#D2D6FF
oklch(88.6% 0.057 280.8)
-
Step 300
300
#B5BAFF
oklch(81% 0.097 280.8)
-
Step 400
400
#9092FF
oklch(70.6% 0.157 280.8)
-
Step 500
500
#7872FF
oklch(63.1% 0.203 280.8)
-
Step 600
600 (this color)
#644FF8
oklch(55.5% 0.239 280.9)
-
Step 700
700
#543ED8
oklch(49.1% 0.222 280.9)
-
Step 800
800
#4435AF
oklch(42.7% 0.184 280.8)
-
Step 900
900
#38308A
oklch(37.6% 0.144 280.9)
-
Step 950
950
#201E51
oklch(27.1% 0.091 280.2)
#644FF8 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) | #0072FD | 0.095 |
| Deuteranopia (no green cones) | #0066F5 | 0.085 |
| Tritanopia (no blue cones) | #007C9E | 0.200 |
| Achromatopsia (no color) | #6C6C6C | 0.240 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #644FF8
#644FF8
oklch(55.5% 0.239 280.9)
- #827400
#827400
oklch(55.5% 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 #644FF8, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Neon Blue #4361EE ΔE 0.053
- Purpley Blue #5F34E7 ΔE 0.056
- Warm Blue #4B57DB ΔE 0.057
- Burple #6832E3 ΔE 0.060
- Medium Slate Blue #7B68EE ΔE 0.069
- Purpley #8756E4 ΔE 0.069
- Dark Periwinkle #665FD1 ΔE 0.069
- Light Indigo #6D5ACF ΔE 0.069
Use #644FF8 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.