#6464E0
Closest named color: Dark Periwinkle (#665FD1). oklch(57% 0.184 278.8), rgb(100, 100, 224).
Aa
White text reads best on this color (4.72:1).
About this color
#6464E0 is a medium-dark, vivid blue. In OKLCH its lightness is 57%, its chroma 0.184 and its hue 279°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Periwinkle (#665FD1), ΔE 0.025 away. White text reads best on it, at 4.72:1.
| Hue family | Blues |
| Lightness | medium-dark (57%) |
| Chroma | vivid (0.184) |
| Temperature | cool |
| Nearest name | Dark Periwinkle (#665FD1) |
| Black text | 4.44:1 |
| White text | 4.72:1 |
Values
| HEX | #6464E0 |
| RGB | rgb(100, 100, 224) |
| HSL | hsl(240, 67%, 64%) |
| OKLCH | oklch(57% 0.184 278.8) |
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 #6464E0 | 4.72:1 | AA | Lc -77.9 | Fine for body text |
| Black text on #6464E0 | 4.44:1 | AA large text | Lc 31.6 | Non-text elements, placeholder text |
| #6464E0 text on white | 4.72:1 | AA | Lc 72.5 | Content text, not long reading |
| #6464E0 text on black | 4.44:1 | AA large text | Lc -29.2 | 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
#F4F5FD
oklch(97.2% 0.011 280.5)
-
Step 100
100
#E6E9FA
oklch(93.7% 0.023 277.9)
-
Step 200
200
#D2D7F8
oklch(88.6% 0.046 278.6)
-
Step 300
300
#B4BCF6
oklch(80.9% 0.082 278.3)
-
Step 400
400
#8F97F2
oklch(70.8% 0.133 278.6)
-
Step 500
500
#767AED
oklch(63.2% 0.169 278.9)
-
Step 600
600 (this color)
#6464E0
oklch(57% 0.184 278.8)
-
Step 700
700
#504EBE
oklch(49.1% 0.171 278.8)
-
Step 800
800
#41419A
oklch(42.8% 0.142 278.6)
-
Step 900
900
#37387A
oklch(37.7% 0.11 279.1)
-
Step 950
950
#202148
oklch(27% 0.071 279.4)
#6464E0 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) | #0378E4 | 0.079 |
| Deuteranopia (no green cones) | #006EDD | 0.076 |
| Tritanopia (no blue cones) | #238198 | 0.161 |
| Achromatopsia (no color) | #737373 | 0.185 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #6464E0
#6464E0
oklch(57% 0.184 278.8)
- #897700
#897700
oklch(56.9% 0.118 98.6)
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 #6464E0, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Periwinkle #665FD1 ΔE 0.025
- Light Indigo #6D5ACF ΔE 0.035
- Slate Blue #6A5ACD ΔE 0.036
- Royal Blue #4169E1 ΔE 0.042
- Medium Slate Blue #7B68EE ΔE 0.042
- Neon Blue #4361EE ΔE 0.048
- Warm Blue #4B57DB ΔE 0.049
- Iris #6258C4 ΔE 0.050
Use #6464E0 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.