#6366A0
Closest named color: French Blue (#436BAD). oklch(53.3% 0.091 280.6), rgb(99, 102, 160).
Aa
White text reads best on this color (5.33:1).
About this color
#6366A0 is a medium-dark, moderately saturated purple. In OKLCH its lightness is 53%, its chroma 0.091 and its hue 281°. Its hue sits on the cool side of the wheel. The nearest named color is French Blue (#436BAD), ΔE 0.043 away. White text reads best on it, at 5.33:1.
| Hue family | Purples |
| Lightness | medium-dark (53%) |
| Chroma | moderately saturated (0.091) |
| Temperature | cool |
| Nearest name | French Blue (#436BAD) |
| Black text | 3.93:1 |
| White text | 5.33:1 |
Values
| HEX | #6366A0 |
| RGB | rgb(99, 102, 160) |
| HSL | hsl(237, 24%, 51%) |
| OKLCH | oklch(53.3% 0.091 280.6) |
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 #6366A0 | 5.33:1 | AA | Lc -81.8 | Fine for body text |
| Black text on #6366A0 | 3.93:1 | AA large text | Lc 27.6 | Dividers and decoration only |
| #6366A0 text on white | 5.33:1 | AA | Lc 76.5 | Fine for body text |
| #6366A0 text on black | 3.93:1 | AA large text | Lc -25.3 | 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
#F5F5F9
oklch(97.1% 0.005 286.3)
-
Step 100
100
#E8E9F2
oklch(93.6% 0.012 281.1)
-
Step 200
200
#D6D8E8
oklch(88.5% 0.022 280.3)
-
Step 300
300
#BBBEDB
oklch(80.8% 0.041 280.8)
-
Step 400
400
#989CC9
oklch(70.6% 0.066 280.6)
-
Step 500
500
#8084BB
oklch(63.2% 0.083 280.5)
-
Step 600
600 (this color)
#6366A0
oklch(53.3% 0.091 280.6)
-
Step 700
700
#585B90
oklch(49.2% 0.084 280.3)
-
Step 800
800
#484A74
oklch(42.6% 0.069 280.9)
-
Step 900
900
#3C3E5E
oklch(37.7% 0.055 280.7)
-
Step 950
950
#232537
oklch(27.1% 0.034 279)
#6366A0 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) | #536DA2 | 0.027 |
| Deuteranopia (no green cones) | #50699F | 0.026 |
| Tritanopia (no blue cones) | #52717B | 0.079 |
| Achromatopsia (no color) | #6B6B6B | 0.091 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #6366A0
#6366A0
oklch(53.3% 0.091 280.6)
- #786E28
#786E28
oklch(53.3% 0.091 101.2)
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 #6366A0, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- French Blue #436BAD ΔE 0.043
- Dusky Blue #475F94 ΔE 0.049
- Dull Blue #49759C ΔE 0.053
- Flat Blue #3C73A8 ΔE 0.054
- Muted Blue #3B719F ΔE 0.054
- Dark Lavender #856798 ΔE 0.055
- Metallic Blue #4F738E ΔE 0.058
- Muted Purple #805B87 ΔE 0.060
Use #6366A0 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.