#6663AE
Closest named color: French Blue (#436BAD). oklch(53.7% 0.115 283.6), rgb(102, 99, 174).
Aa
White text reads best on this color (5.30:1).
About this color
#6663AE is a medium-dark, moderately saturated purple. In OKLCH its lightness is 54%, its chroma 0.115 and its hue 284°. Its hue sits on the cool side of the wheel. The nearest named color is French Blue (#436BAD), ΔE 0.048 away. White text reads best on it, at 5.30:1.
| Hue family | Purples |
| Lightness | medium-dark (54%) |
| Chroma | moderately saturated (0.115) |
| Temperature | cool |
| Nearest name | French Blue (#436BAD) |
| Black text | 3.96:1 |
| White text | 5.30:1 |
Values
| HEX | #6663AE |
| RGB | rgb(102, 99, 174) |
| HSL | hsl(242, 32%, 54%) |
| OKLCH | oklch(53.7% 0.115 283.6) |
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 #6663AE | 5.30:1 | AA | Lc -81.6 | Fine for body text |
| Black text on #6663AE | 3.96:1 | AA large text | Lc 27.8 | Dividers and decoration only |
| #6663AE text on white | 5.30:1 | AA | Lc 76.3 | Fine for body text |
| #6663AE text on black | 3.96:1 | AA large text | Lc -25.5 | 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
#F5F5FA
oklch(97.2% 0.007 286.3)
-
Step 100
100
#E8E9F4
oklch(93.6% 0.015 281.9)
-
Step 200
200
#D6D7EC
oklch(88.5% 0.029 283.6)
-
Step 300
300
#BCBDE2
oklch(81% 0.052 284)
-
Step 400
400
#999AD3
oklch(70.7% 0.083 283.3)
-
Step 500
500
#8180C8
oklch(63.1% 0.107 283.5)
-
Step 600
600 (this color)
#6663AE
oklch(53.7% 0.115 283.6)
-
Step 700
700
#5A579B
oklch(49.2% 0.107 283.7)
-
Step 800
800
#49477E
oklch(42.6% 0.09 283.6)
-
Step 900
900
#3D3C65
oklch(37.7% 0.069 283.7)
-
Step 950
950
#24233B
oklch(26.9% 0.044 284.9)
#6663AE 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) | #486EB1 | 0.045 |
| Deuteranopia (no green cones) | #4569AC | 0.045 |
| Tritanopia (no blue cones) | #517280 | 0.099 |
| Achromatopsia (no color) | #6B6B6B | 0.116 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #6663AE
#6663AE
oklch(53.7% 0.115 283.6)
- #7A7000
#7A7000
oklch(53.7% 0.113 103.3)
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 #6663AE, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- French Blue #436BAD ΔE 0.048
- Iris #6258C4 ΔE 0.048
- Slate Blue #6A5ACD ΔE 0.056
- Dark Periwinkle #665FD1 ΔE 0.057
- Light Indigo #6D5ACF ΔE 0.060
- Dusky Blue #475F94 ΔE 0.062
- Dark Lavender #856798 ΔE 0.063
- Flat Blue #3C73A8 ΔE 0.065
Use #6663AE 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.