#6463DE
Closest named color: Dark Periwinkle (#665FD1). oklch(56.7% 0.183 279.2), rgb(100, 99, 222).
Aa
White text reads best on this color (4.79:1).
About this color
#6463DE is a medium-dark, vivid blue. In OKLCH its lightness is 57%, its chroma 0.183 and its hue 279°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Periwinkle (#665FD1), ΔE 0.021 away. White text reads best on it, at 4.79:1.
| Hue family | Blues |
| Lightness | medium-dark (57%) |
| Chroma | vivid (0.183) |
| Temperature | cool |
| Nearest name | Dark Periwinkle (#665FD1) |
| Black text | 4.38:1 |
| White text | 4.79:1 |
Values
| HEX | #6463DE |
| RGB | rgb(100, 99, 222) |
| HSL | hsl(240, 65%, 63%) |
| OKLCH | oklch(56.7% 0.183 279.2) |
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 #6463DE | 4.79:1 | AA | Lc -78.4 | Fine for body text |
| Black text on #6463DE | 4.38:1 | AA large text | Lc 31.2 | Non-text elements, placeholder text |
| #6463DE text on white | 4.79:1 | AA | Lc 72.9 | Content text, not long reading |
| #6463DE text on black | 4.38:1 | AA large text | Lc -28.8 | 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
#B5BCF6
oklch(81% 0.082 279)
-
Step 400
400
#9097F1
oklch(70.8% 0.131 279.1)
-
Step 500
500
#777AEC
oklch(63.2% 0.168 279.3)
-
Step 600
600 (this color)
#6463DE
oklch(56.7% 0.183 279.2)
-
Step 700
700
#514EBD
oklch(49.1% 0.169 279.3)
-
Step 800
800
#424199
oklch(42.8% 0.14 279.2)
-
Step 900
900
#37387A
oklch(37.7% 0.11 279.1)
-
Step 950
950
#202147
oklch(26.9% 0.069 279.5)
#6463DE 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) | #0477E2 | 0.079 |
| Deuteranopia (no green cones) | #006DDB | 0.077 |
| Tritanopia (no blue cones) | #277F97 | 0.157 |
| Achromatopsia (no color) | #727272 | 0.183 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #6463DE
#6463DE
oklch(56.7% 0.183 279.2)
- #887700
#887700
oklch(56.8% 0.118 99.3)
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 #6463DE, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Periwinkle #665FD1 ΔE 0.021
- Light Indigo #6D5ACF ΔE 0.031
- Slate Blue #6A5ACD ΔE 0.033
- Royal Blue #4169E1 ΔE 0.042
- Medium Slate Blue #7B68EE ΔE 0.044
- Iris #6258C4 ΔE 0.046
- Warm Blue #4B57DB ΔE 0.048
- Neon Blue #4361EE ΔE 0.048
Use #6463DE 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.