#6464D9
Closest named color: Dark Periwinkle (#665FD1). oklch(56.5% 0.175 279.2), rgb(100, 100, 217).
Aa
White text reads best on this color (4.80:1).
About this color
#6464D9 is a medium-dark, vivid blue. In OKLCH its lightness is 57%, its chroma 0.175 and its hue 279°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Periwinkle (#665FD1), ΔE 0.016 away. White text reads best on it, at 4.80:1.
| Hue family | Blues |
| Lightness | medium-dark (57%) |
| Chroma | vivid (0.175) |
| Temperature | cool |
| Nearest name | Dark Periwinkle (#665FD1) |
| Black text | 4.36:1 |
| White text | 4.80:1 |
Values
| HEX | #6464D9 |
| RGB | rgb(100, 100, 217) |
| HSL | hsl(240, 61%, 62%) |
| OKLCH | oklch(56.5% 0.175 279.2) |
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 #6464D9 | 4.80:1 | AA | Lc -78.5 | Fine for body text |
| Black text on #6464D9 | 4.36:1 | AA large text | Lc 31.0 | Non-text elements, placeholder text |
| #6464D9 text on white | 4.80:1 | AA | Lc 73.1 | Content text, not long reading |
| #6464D9 text on black | 4.36:1 | AA large text | Lc -28.6 | 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
#F4F5FD
oklch(97.2% 0.011 280.5)
-
Step 100
100
#E6E9F9
oklch(93.6% 0.022 277.5)
-
Step 200
200
#D2D7F6
oklch(88.5% 0.043 278.2)
-
Step 300
300
#B5BCF3
oklch(80.9% 0.078 278.9)
-
Step 400
400
#9097EE
oklch(70.7% 0.127 279.1)
-
Step 500
500
#777BE8
oklch(63.1% 0.161 279.1)
-
Step 600
600 (this color)
#6464D9
oklch(56.5% 0.175 279.2)
-
Step 700
700
#5150B9
oklch(49.1% 0.161 279.1)
-
Step 800
800
#424296
oklch(42.7% 0.134 279.1)
-
Step 900
900
#373977
oklch(37.7% 0.104 278.8)
-
Step 950
950
#202246
oklch(27.1% 0.066 278.6)
#6464D9 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) | #1C77DD | 0.073 |
| Deuteranopia (no green cones) | #006DD7 | 0.077 |
| Tritanopia (no blue cones) | #2D7F95 | 0.152 |
| Achromatopsia (no color) | #727272 | 0.175 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #6464D9
#6464D9
oklch(56.5% 0.175 279.2)
- #877600
#877600
oklch(56.4% 0.117 99.2)
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 #6464D9, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Periwinkle #665FD1 ΔE 0.016
- Light Indigo #6D5ACF ΔE 0.029
- Slate Blue #6A5ACD ΔE 0.029
- Iris #6258C4 ΔE 0.042
- Royal Blue #4169E1 ΔE 0.043
- Medium Slate Blue #7B68EE ΔE 0.048
- Warm Blue #4B57DB ΔE 0.049
- Neon Blue #4361EE ΔE 0.053
Use #6464D9 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.