#6566AC
Closest named color: French Blue (#436BAD). oklch(54.1% 0.108 281.5), rgb(101, 102, 172).
Aa
White text reads best on this color (5.18:1).
About this color
#6566AC is a medium-dark, moderately saturated purple. In OKLCH its lightness is 54%, its chroma 0.108 and its hue 282°. 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 5.18:1.
| Hue family | Purples |
| Lightness | medium-dark (54%) |
| Chroma | moderately saturated (0.108) |
| Temperature | cool |
| Nearest name | French Blue (#436BAD) |
| Black text | 4.04:1 |
| White text | 5.18:1 |
Values
| HEX | #6566AC |
| RGB | rgb(101, 102, 172) |
| HSL | hsl(239, 30%, 54%) |
| OKLCH | oklch(54.1% 0.108 281.5) |
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 #6566AC | 5.18:1 | AA | Lc -81.0 | Fine for body text |
| Black text on #6566AC | 4.04:1 | AA large text | Lc 28.5 | Dividers and decoration only |
| #6566AC text on white | 5.18:1 | AA | Lc 75.6 | Fine for body text |
| #6566AC 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
#E8E9F3
oklch(93.6% 0.013 281.6)
-
Step 200
200
#D6D7EB
oklch(88.4% 0.027 283.5)
-
Step 300
300
#BBBEE0
oklch(81% 0.048 281.3)
-
Step 400
400
#989BD1
oklch(70.7% 0.079 281.7)
-
Step 500
500
#7F82C4
oklch(63.1% 0.099 281.2)
-
Step 600
600 (this color)
#6566AC
oklch(54.1% 0.108 281.5)
-
Step 700
700
#585898
oklch(49% 0.101 282)
-
Step 800
800
#48497B
oklch(42.8% 0.082 281.5)
-
Step 900
900
#3C3D63
oklch(37.7% 0.065 281.7)
-
Step 950
950
#23243A
oklch(27% 0.041 281.3)
#6566AC 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) | #4D6FAF | 0.037 |
| Deuteranopia (no green cones) | #4A6AAA | 0.036 |
| Tritanopia (no blue cones) | #507481 | 0.093 |
| Achromatopsia (no color) | #6D6D6D | 0.108 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #6566AC
#6566AC
oklch(54.1% 0.108 281.5)
- #7C7010
#7C7010
oklch(54% 0.108 101.5)
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 #6566AC, closest first.
No curated palette has a color within ΔE 0.04 of #6566AC.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- French Blue #436BAD ΔE 0.043
- Iris #6258C4 ΔE 0.057
- Flat Blue #3C73A8 ΔE 0.058
- Dark Lavender #856798 ΔE 0.060
- Dusky Blue #475F94 ΔE 0.061
- Muted Blue #3B719F ΔE 0.063
- Dark Periwinkle #665FD1 ΔE 0.063
- Dull Blue #49759C ΔE 0.063
Use #6566AC 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.