#6C64BC
Closest named color: Dark Periwinkle (#665FD1). oklch(55.2% 0.133 285.3), rgb(108, 100, 188).
Aa
White text reads best on this color (5.01:1).
About this color
#6C64BC is a medium-dark, moderately saturated purple. In OKLCH its lightness is 55%, its chroma 0.133 and its hue 285°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Periwinkle (#665FD1), ΔE 0.038 away. White text reads best on it, at 5.01:1.
| Hue family | Purples |
| Lightness | medium-dark (55%) |
| Chroma | moderately saturated (0.133) |
| Temperature | cool |
| Nearest name | Dark Periwinkle (#665FD1) |
| Black text | 4.18:1 |
| White text | 5.01:1 |
Values
| HEX | #6C64BC |
| RGB | rgb(108, 100, 188) |
| HSL | hsl(245, 40%, 56%) |
| OKLCH | oklch(55.2% 0.133 285.3) |
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 #6C64BC | 5.01:1 | AA | Lc -79.9 | Fine for body text |
| Black text on #6C64BC | 4.18:1 | AA large text | Lc 29.6 | Dividers and decoration only |
| #6C64BC text on white | 5.01:1 | AA | Lc 74.5 | Content text, not long reading |
| #6C64BC text on black | 4.18:1 | AA large text | Lc -27.2 | 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
#F5F5FB
oklch(97.2% 0.008 286.3)
-
Step 100
100
#E8E8F5
oklch(93.5% 0.017 286.1)
-
Step 200
200
#D6D7EF
oklch(88.6% 0.033 283.8)
-
Step 300
300
#BCBCE7
oklch(81% 0.06 285)
-
Step 400
400
#9A98DA
oklch(70.6% 0.096 285.1)
-
Step 500
500
#837DD0
oklch(63% 0.123 285.6)
-
Step 600
600 (this color)
#6C64BC
oklch(55.2% 0.133 285.3)
-
Step 700
700
#5B54A3
oklch(49.2% 0.123 284.9)
-
Step 800
800
#4A4584
oklch(42.7% 0.102 284.8)
-
Step 900
900
#3E3A6A
oklch(37.6% 0.081 285.6)
-
Step 950
950
#24223E
oklch(26.9% 0.051 285.7)
#6C64BC 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) | #4272BF | 0.059 |
| Deuteranopia (no green cones) | #3F6DBA | 0.059 |
| Tritanopia (no blue cones) | #547687 | 0.113 |
| Achromatopsia (no color) | #6F6F6F | 0.134 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #6C64BC
#6C64BC
oklch(55.2% 0.133 285.3)
- #7D7500
#7D7500
oklch(55.2% 0.117 104.8)
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 #6C64BC, closest first.
No curated palette has a color within ΔE 0.04 of #6C64BC.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Periwinkle #665FD1 ΔE 0.038
- Slate Blue #6A5ACD ΔE 0.039
- Iris #6258C4 ΔE 0.039
- Light Indigo #6D5ACF ΔE 0.041
- Deep Lavender #8D5EB7 ΔE 0.055
- French Blue #436BAD ΔE 0.062
- Dark Lavender #856798 ΔE 0.071
- Windows Blue #3778BF ΔE 0.075
Use #6C64BC 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.