#6566AF
Closest named color: French Blue (#436BAD). oklch(54.3% 0.113 281.4), rgb(101, 102, 175).
Aa
White text reads best on this color (5.15:1).
About this color
#6566AF is a medium-dark, moderately saturated purple. In OKLCH its lightness is 54%, its chroma 0.113 and its hue 281°. Its hue sits on the cool side of the wheel. The nearest named color is French Blue (#436BAD), ΔE 0.044 away. White text reads best on it, at 5.15:1.
| Hue family | Purples |
| Lightness | medium-dark (54%) |
| Chroma | moderately saturated (0.113) |
| Temperature | cool |
| Nearest name | French Blue (#436BAD) |
| Black text | 4.07:1 |
| White text | 5.15:1 |
Values
| HEX | #6566AF |
| RGB | rgb(101, 102, 175) |
| HSL | hsl(239, 32%, 54%) |
| OKLCH | oklch(54.3% 0.113 281.4) |
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 #6566AF | 5.15:1 | AA | Lc -80.8 | Fine for body text |
| Black text on #6566AF | 4.07:1 | AA large text | Lc 28.7 | Dividers and decoration only |
| #6566AF text on white | 5.15:1 | AA | Lc 75.4 | Fine for body text |
| #6566AF text on black | 4.07:1 | AA large text | Lc -26.3 | 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
#F4F5FA
oklch(97.1% 0.007 277.2)
-
Step 100
100
#E8E9F4
oklch(93.6% 0.015 281.9)
-
Step 200
200
#D5D7EC
oklch(88.4% 0.029 281.5)
-
Step 300
300
#BABDE1
oklch(80.8% 0.051 281.4)
-
Step 400
400
#989BD2
oklch(70.7% 0.08 281.7)
-
Step 500
500
#7F81C7
oklch(63% 0.105 281.7)
-
Step 600
600 (this color)
#6566AF
oklch(54.3% 0.113 281.4)
-
Step 700
700
#57589A
oklch(49.1% 0.104 281.2)
-
Step 800
800
#47487D
oklch(42.6% 0.087 281.2)
-
Step 900
900
#3C3D65
oklch(37.8% 0.068 281.6)
-
Step 950
950
#23243B
oklch(27.1% 0.043 281.2)
#6566AF 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) | #4C70B2 | 0.039 |
| Deuteranopia (no green cones) | #486BAD | 0.039 |
| Tritanopia (no blue cones) | #4E7582 | 0.098 |
| Achromatopsia (no color) | #6D6D6D | 0.113 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #6566AF
#6566AF
oklch(54.3% 0.113 281.4)
- #7E7103
#7E7103
oklch(54.4% 0.113 101.3)
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 #6566AF, closest first.
No curated palette has a color within ΔE 0.04 of #6566AF.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- French Blue #436BAD ΔE 0.044
- Iris #6258C4 ΔE 0.053
- Dark Periwinkle #665FD1 ΔE 0.058
- Slate Blue #6A5ACD ΔE 0.060
- Flat Blue #3C73A8 ΔE 0.060
- Dark Lavender #856798 ΔE 0.062
- Light Indigo #6D5ACF ΔE 0.063
- Dusky Blue #475F94 ΔE 0.064
Use #6566AF 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.