#644CFF
Closest named color: Purpley Blue (#5F34E7). oklch(55.7% 0.25 280.6), rgb(100, 76, 255).
Aa
White text reads best on this color (5.22:1).
About this color
#644CFF is a medium-dark, vivid purple. In OKLCH its lightness is 56%, its chroma 0.250 and its hue 281°. Its hue sits on the cool side of the wheel. The nearest named color is Purpley Blue (#5F34E7), ΔE 0.058 away. White text reads best on it, at 5.22:1.
| Hue family | Purples |
| Lightness | medium-dark (56%) |
| Chroma | vivid (0.250) |
| Temperature | cool |
| Nearest name | Purpley Blue (#5F34E7) |
| Black text | 4.01:1 |
| White text | 5.22:1 |
Values
| HEX | #644CFF |
| RGB | rgb(100, 76, 255) |
| HSL | hsl(248, 100%, 65%) |
| OKLCH | oklch(55.7% 0.25 280.6) |
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 #644CFF | 5.22:1 | AA | Lc -80.5 | Fine for body text |
| Black text on #644CFF | 4.01:1 | AA large text | Lc 29.0 | Dividers and decoration only |
| #644CFF text on white | 5.22:1 | AA | Lc 75.1 | Fine for body text |
| #644CFF text on black | 4.01:1 | AA large text | Lc -26.6 | 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
#E5E8FF
oklch(93.6% 0.031 279.9)
-
Step 200
200
#D1D6FF
oklch(88.5% 0.057 279.7)
-
Step 300
300
#B4BAFF
oklch(80.9% 0.098 280.1)
-
Step 400
400
#9093FF
oklch(70.8% 0.156 280.4)
-
Step 500
500
#7872FF
oklch(63.1% 0.203 280.8)
-
Step 600
600 (this color)
#644CFF
oklch(55.7% 0.25 280.6)
-
Step 700
700
#543ADE
oklch(49.1% 0.233 280.7)
-
Step 800
800
#4432B3
oklch(42.7% 0.193 280.8)
-
Step 900
900
#382F8E
oklch(37.8% 0.151 280.6)
-
Step 950
950
#201D53
oklch(27% 0.095 280.4)
#644CFF 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) | #0073FF | 0.098 |
| Deuteranopia (no green cones) | #0066FC | 0.086 |
| Tritanopia (no blue cones) | #007DA1 | 0.207 |
| Achromatopsia (no color) | #6C6C6C | 0.252 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #644CFF
#644CFF
oklch(55.7% 0.25 280.6)
- #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 #644CFF, closest first.
No curated palette has a color within ΔE 0.04 of #644CFF.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Purpley Blue #5F34E7 ΔE 0.058
- Neon Blue #4361EE ΔE 0.059
- Burple #6832E3 ΔE 0.063
- Warm Blue #4B57DB ΔE 0.066
- Purply Blue #661AEE ΔE 0.073
- Medium Slate Blue #7B68EE ΔE 0.076
- Purpley #8756E4 ΔE 0.076
- Light Indigo #6D5ACF ΔE 0.081
Use #644CFF 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.