#5665B7
Closest named color: French Blue (#436BAD). oklch(53.5% 0.129 273.5), rgb(86, 101, 183).
Aa
White text reads best on this color (5.32:1).
About this color
#5665B7 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 53%, its chroma 0.129 and its hue 273°. Its hue sits on the cool side of the wheel. The nearest named color is French Blue (#436BAD), ΔE 0.033 away. White text reads best on it, at 5.32:1.
| Hue family | Blues |
| Lightness | medium-dark (53%) |
| Chroma | moderately saturated (0.129) |
| Temperature | cool |
| Nearest name | French Blue (#436BAD) |
| Black text | 3.94:1 |
| White text | 5.32:1 |
Values
| HEX | #5665B7 |
| RGB | rgb(86, 101, 183) |
| HSL | hsl(231, 40%, 53%) |
| OKLCH | oklch(53.5% 0.129 273.5) |
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 #5665B7 | 5.32:1 | AA | Lc -81.7 | Fine for body text |
| Black text on #5665B7 | 3.94:1 | AA large text | Lc 27.7 | Dividers and decoration only |
| #5665B7 text on white | 5.32:1 | AA | Lc 76.3 | Fine for body text |
| #5665B7 text on black | 3.94:1 | AA large text | Lc -25.4 | 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
#F4F5FB
oklch(97.1% 0.008 278.6)
-
Step 100
100
#E6E9F5
oklch(93.5% 0.016 274.8)
-
Step 200
200
#D2D8EF
oklch(88.5% 0.032 274.1)
-
Step 300
300
#B4BFE7
oklch(81% 0.058 273)
-
Step 400
400
#8E9DDB
oklch(70.8% 0.093 273.4)
-
Step 500
500
#7383D1
oklch(63.1% 0.119 273.7)
-
Step 600
600 (this color)
#5665B7
oklch(53.5% 0.129 273.5)
-
Step 700
700
#4C59A4
oklch(49.1% 0.12 273.7)
-
Step 800
800
#3E4985
oklch(42.7% 0.1 273.6)
-
Step 900
900
#353E6A
oklch(37.8% 0.076 273.5)
-
Step 950
950
#1F243E
oklch(26.9% 0.049 274.4)
#5665B7 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) | #426FBA | 0.032 |
| Deuteranopia (no green cones) | #3767B5 | 0.035 |
| Tritanopia (no blue cones) | #297785 | 0.115 |
| Achromatopsia (no color) | #6B6B6B | 0.129 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5665B7
#5665B7
oklch(53.5% 0.129 273.5)
- #836B00
#836B00
oklch(53.5% 0.11 93.3)
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 #5665B7, closest first.
No curated palette has a color within ΔE 0.04 of #5665B7.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- French Blue #436BAD ΔE 0.033
- Iris #6258C4 ΔE 0.043
- Mid Blue #276AB3 ΔE 0.048
- Dark Periwinkle #665FD1 ΔE 0.050
- Slate Blue #6A5ACD ΔE 0.053
- Windows Blue #3778BF ΔE 0.055
- Flat Blue #3C73A8 ΔE 0.055
- Light Indigo #6D5ACF ΔE 0.058
Use #5665B7 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.