#5D66A4
Closest named color: French Blue (#436BAD). oklch(53% 0.098 276.3), rgb(93, 102, 164).
Aa
White text reads best on this color (5.38:1).
About this color
#5D66A4 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 53%, its chroma 0.098 and its hue 276°. Its hue sits on the cool side of the wheel. The nearest named color is French Blue (#436BAD), ΔE 0.034 away. White text reads best on it, at 5.38:1.
| Hue family | Blues |
| Lightness | medium-dark (53%) |
| Chroma | moderately saturated (0.098) |
| Temperature | cool |
| Nearest name | French Blue (#436BAD) |
| Black text | 3.90:1 |
| White text | 5.38:1 |
Values
| HEX | #5D66A4 |
| RGB | rgb(93, 102, 164) |
| HSL | hsl(232, 28%, 50%) |
| OKLCH | oklch(53% 0.098 276.3) |
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 #5D66A4 | 5.38:1 | AA | Lc -82.1 | Fine for body text |
| Black text on #5D66A4 | 3.90:1 | AA large text | Lc 27.3 | Dividers and decoration only |
| #5D66A4 text on white | 5.38:1 | AA | Lc 76.7 | Fine for body text |
| #5D66A4 text on black | 3.90:1 | AA large text | Lc -25.0 | 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
#F4F5F9
oklch(97.1% 0.005 275)
-
Step 100
100
#E7E9F3
oklch(93.5% 0.014 277.1)
-
Step 200
200
#D4D8EA
oklch(88.5% 0.025 275.9)
-
Step 300
300
#B8BFDE
oklch(80.9% 0.044 275.3)
-
Step 400
400
#949DCD
oklch(70.6% 0.071 276.2)
-
Step 500
500
#7B85C0
oklch(63.2% 0.09 276.1)
-
Step 600
600 (this color)
#5D66A4
oklch(53% 0.098 276.3)
-
Step 700
700
#535B94
oklch(49% 0.092 276.4)
-
Step 800
800
#444B78
oklch(42.8% 0.075 276)
-
Step 900
900
#393F61
oklch(37.8% 0.059 275.6)
-
Step 950
950
#212539
oklch(27% 0.038 274.9)
#5D66A4 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) | #506DA6 | 0.024 |
| Deuteranopia (no green cones) | #4B68A3 | 0.024 |
| Tritanopia (no blue cones) | #46737D | 0.087 |
| Achromatopsia (no color) | #6A6A6A | 0.098 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5D66A4
#5D66A4
oklch(53% 0.098 276.3)
- #7D6B1C
#7D6B1C
oklch(53% 0.098 95.7)
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 #5D66A4, closest first.
No curated palette has a color within ΔE 0.04 of #5D66A4.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- French Blue #436BAD ΔE 0.034
- Dusky Blue #475F94 ΔE 0.044
- Flat Blue #3C73A8 ΔE 0.048
- Muted Blue #3B719F ΔE 0.049
- Dull Blue #49759C ΔE 0.052
- Mid Blue #276AB3 ΔE 0.058
- Denim #3B638C ΔE 0.060
- Metallic Blue #4F738E ΔE 0.060
Use #5D66A4 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.