#566397
Closest named color: Dusky Blue (#475F94). oklch(51.2% 0.084 272.4), rgb(86, 99, 151).
Aa
White text reads best on this color (5.78:1).
About this color
#566397 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 51%, its chroma 0.084 and its hue 272°. Its hue sits on the cool side of the wheel. The nearest named color is Dusky Blue (#475F94), ΔE 0.025 away. White text reads best on it, at 5.78:1.
| Hue family | Blues |
| Lightness | medium-dark (51%) |
| Chroma | moderately saturated (0.084) |
| Temperature | cool |
| Nearest name | Dusky Blue (#475F94) |
| Black text | 3.62:1 |
| White text | 5.78:1 |
Values
| HEX | #566397 |
| RGB | rgb(86, 99, 151) |
| HSL | hsl(228, 27%, 46%) |
| OKLCH | oklch(51.2% 0.084 272.4) |
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 #566397 | 5.78:1 | AA | Lc -84.1 | Fine for body text |
| Black text on #566397 | 3.62:1 | AA large text | Lc 25.2 | Dividers and decoration only |
| #566397 text on white | 5.78:1 | AA | Lc 78.9 | Fine for body text |
| #566397 text on black | 3.62:1 | AA large text | Lc -22.9 | 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 700.
-
Step 50
50
#F4F5F9
oklch(97.1% 0.005 275)
-
Step 100
100
#E7E9F2
oklch(93.5% 0.012 276.1)
-
Step 200
200
#D4D9E9
oklch(88.6% 0.023 272)
-
Step 300
300
#B7C0DC
oklch(81% 0.041 271.4)
-
Step 400
400
#929FCA
oklch(70.8% 0.065 271.6)
-
Step 500
500
#7886BC
oklch(63% 0.083 272.7)
-
Step 600
600
#616FA9
oklch(55.5% 0.092 272.8)
-
Step 700
700 (this color)
#566397
oklch(51.2% 0.084 272.4)
-
Step 800
800
#424C75
oklch(42.7% 0.069 272.7)
-
Step 900
900
#38405F
oklch(37.8% 0.054 272.5)
-
Step 950
950
#212537
oklch(26.9% 0.034 274.3)
#566397 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) | #516899 | 0.015 |
| Deuteranopia (no green cones) | #4B6396 | 0.015 |
| Tritanopia (no blue cones) | #406E76 | 0.076 |
| Achromatopsia (no color) | #656565 | 0.084 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #566397
#566397
oklch(51.2% 0.084 272.4)
- #786527
#786527
oklch(51.2% 0.084 92.1)
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 #566397, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusky Blue #475F94 ΔE 0.025
- Denim #3B638C ΔE 0.039
- French Blue #436BAD ΔE 0.041
- Denim Blue #3B5B92 ΔE 0.045
- Muted Blue #3B719F ΔE 0.046
- Flat Blue #3C73A8 ΔE 0.051
- Dull Blue #49759C ΔE 0.051
- Dusk #4E5481 ΔE 0.053
Use #566397 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.