#566F97
Closest named color: Dull Blue (#49759C). oklch(53.8% 0.07 259.6), rgb(86, 111, 151).
Aa
White text reads best on this color (5.10:1).
About this color
#566F97 is a medium-dark, muted blue. In OKLCH its lightness is 54%, its chroma 0.070 and its hue 260°. Its hue sits on the cool side of the wheel. The nearest named color is Dull Blue (#49759C), ΔE 0.021 away. White text reads best on it, at 5.10:1.
| Hue family | Blues |
| Lightness | medium-dark (54%) |
| Chroma | muted (0.070) |
| Temperature | cool |
| Nearest name | Dull Blue (#49759C) |
| Black text | 4.11:1 |
| White text | 5.10:1 |
Values
| HEX | #566F97 |
| RGB | rgb(86, 111, 151) |
| HSL | hsl(217, 27%, 46%) |
| OKLCH | oklch(53.8% 0.07 259.6) |
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 #566F97 | 5.10:1 | AA | Lc -80.5 | Fine for body text |
| Black text on #566F97 | 4.11:1 | AA large text | Lc 28.9 | Dividers and decoration only |
| #566F97 text on white | 5.10:1 | AA | Lc 75.1 | Fine for body text |
| #566F97 text on black | 4.11:1 | AA large text | Lc -26.6 | 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
#F4F5F8
oklch(97% 0.004 271.4)
-
Step 100
100
#E6EAF0
oklch(93.6% 0.009 258.3)
-
Step 200
200
#D2DAE5
oklch(88.6% 0.017 256.3)
-
Step 300
300
#B5C1D5
oklch(80.8% 0.031 260.7)
-
Step 400
400
#8EA2C1
oklch(70.8% 0.051 259.1)
-
Step 500
500
#738BB1
oklch(63.2% 0.064 259.5)
-
Step 600
600 (this color)
#566F97
oklch(53.8% 0.07 259.6)
-
Step 700
700
#4B6186
oklch(49.1% 0.066 260.6)
-
Step 800
800
#3D506D
oklch(42.8% 0.054 258.7)
-
Step 900
900
#344258
oklch(37.6% 0.042 259.3)
-
Step 950
950
#1F2734
oklch(27.1% 0.027 260)
#566F97 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) | #607199 | 0.015 |
| Deuteranopia (no green cones) | #596B96 | 0.011 |
| Tritanopia (no blue cones) | #3F787D | 0.062 |
| Achromatopsia (no color) | #6E6E6E | 0.070 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #566F97
#566F97
oklch(53.8% 0.07 259.6)
- #846A3D
#846A3D
oklch(53.9% 0.07 80.1)
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 #566F97, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dull Blue #49759C ΔE 0.021
- Metallic Blue #4F738E ΔE 0.023
- Muted Blue #3B719F ΔE 0.030
- Stormy Blue #507B9C ΔE 0.034
- Flat Blue #3C73A8 ΔE 0.036
- Cerulean #457B9D ΔE 0.036
- French Blue #436BAD ΔE 0.045
- Denim #3B638C ΔE 0.052
Use #566F97 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.