#6366AE
Closest named color: French Blue (#436BAD). oklch(54.1% 0.111 280.2), rgb(99, 102, 174).
Aa
White text reads best on this color (5.19:1).
About this color
#6366AE is a medium-dark, moderately saturated purple. In OKLCH its lightness is 54%, its chroma 0.111 and its hue 280°. Its hue sits on the cool side of the wheel. The nearest named color is French Blue (#436BAD), ΔE 0.041 away. White text reads best on it, at 5.19:1.
| Hue family | Purples |
| Lightness | medium-dark (54%) |
| Chroma | moderately saturated (0.111) |
| Temperature | cool |
| Nearest name | French Blue (#436BAD) |
| Black text | 4.04:1 |
| White text | 5.19:1 |
Values
| HEX | #6366AE |
| RGB | rgb(99, 102, 174) |
| HSL | hsl(238, 32%, 54%) |
| OKLCH | oklch(54.1% 0.111 280.2) |
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 #6366AE | 5.19:1 | AA | Lc -81.0 | Fine for body text |
| Black text on #6366AE | 4.04:1 | AA large text | Lc 28.4 | Dividers and decoration only |
| #6366AE text on white | 5.19:1 | AA | Lc 75.6 | Fine for body text |
| #6366AE text on black | 4.04:1 | AA large text | Lc -26.1 | 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
#F4F5FA
oklch(97.1% 0.007 277.2)
-
Step 100
100
#E8E9F4
oklch(93.6% 0.015 281.9)
-
Step 200
200
#D5D8EC
oklch(88.6% 0.028 279)
-
Step 300
300
#BABEE1
oklch(81% 0.049 280.1)
-
Step 400
400
#969BD2
oklch(70.6% 0.08 280.1)
-
Step 500
500
#7E82C6
oklch(63.1% 0.102 280.5)
-
Step 600
600 (this color)
#6366AE
oklch(54.1% 0.111 280.2)
-
Step 700
700
#56599A
oklch(49.2% 0.103 279.9)
-
Step 800
800
#46497D
oklch(42.8% 0.086 279.6)
-
Step 900
900
#3B3D64
oklch(37.7% 0.066 280.5)
-
Step 950
950
#22243B
oklch(27% 0.043 279.3)
#6366AE 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) | #4C70B1 | 0.037 |
| Deuteranopia (no green cones) | #476AAC | 0.037 |
| Tritanopia (no blue cones) | #4B7581 | 0.099 |
| Achromatopsia (no color) | #6D6D6D | 0.112 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #6366AE
#6366AE
oklch(54.1% 0.111 280.2)
- #7E7003
#7E7003
oklch(54.2% 0.112 100.6)
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 #6366AE, closest first.
No curated palette has a color within ΔE 0.04 of #6366AE.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- French Blue #436BAD ΔE 0.041
- Iris #6258C4 ΔE 0.054
- Flat Blue #3C73A8 ΔE 0.057
- Dark Periwinkle #665FD1 ΔE 0.060
- Dusky Blue #475F94 ΔE 0.060
- Slate Blue #6A5ACD ΔE 0.061
- Muted Blue #3B719F ΔE 0.063
- Dark Lavender #856798 ΔE 0.064
Use #6366AE 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.