#4165B5
Closest named color: French Blue (#436BAD). oklch(52.1% 0.133 264.1), rgb(65, 101, 181).
Aa
White text reads best on this color (5.59:1).
About this color
#4165B5 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 52%, its chroma 0.133 and its hue 264°. Its hue sits on the cool side of the wheel. The nearest named color is French Blue (#436BAD), ΔE 0.023 away. White text reads best on it, at 5.59:1.
| Hue family | Blues |
| Lightness | medium-dark (52%) |
| Chroma | moderately saturated (0.133) |
| Temperature | cool |
| Nearest name | French Blue (#436BAD) |
| Black text | 3.75:1 |
| White text | 5.59:1 |
Values
| HEX | #4165B5 |
| RGB | rgb(65, 101, 181) |
| HSL | hsl(221, 47%, 48%) |
| OKLCH | oklch(52.1% 0.133 264.1) |
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 #4165B5 | 5.59:1 | AA | Lc -83.0 | Fine for body text |
| Black text on #4165B5 | 3.75:1 | AA large text | Lc 26.4 | Dividers and decoration only |
| #4165B5 text on white | 5.59:1 | AA | Lc 77.7 | Fine for body text |
| #4165B5 text on black | 3.75:1 | AA large text | Lc -24.1 | 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
#F2F5FB
oklch(97% 0.009 264.5)
-
Step 100
100
#E4EAF7
oklch(93.6% 0.019 266)
-
Step 200
200
#CDD9F2
oklch(88.4% 0.037 265.1)
-
Step 300
300
#ACC1EB
oklch(80.9% 0.064 264.1)
-
Step 400
400
#80A0E1
oklch(70.8% 0.102 263.9)
-
Step 500
500
#6087D9
oklch(63.2% 0.131 263.8)
-
Step 600
600
#476FC6
oklch(55.6% 0.142 263.8)
-
Step 700
700 (this color)
#4165B5
oklch(52.1% 0.133 264.1)
-
Step 800
800
#2F4C8B
oklch(42.8% 0.11 263.8)
-
Step 900
900
#2A406F
oklch(37.8% 0.085 263.9)
-
Step 950
950
#192641
oklch(27.2% 0.054 263.7)
#4165B5 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) | #3F6DB8 | 0.022 |
| Deuteranopia (no green cones) | #2D63B3 | 0.021 |
| Tritanopia (no blue cones) | #007784 | 0.111 |
| Achromatopsia (no color) | #686868 | 0.133 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4165B5
#4165B5
oklch(52.1% 0.133 264.1)
- #866300
#866300
oklch(52.1% 0.107 84.3)
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 #4165B5, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- French Blue #436BAD ΔE 0.023
- Mid Blue #276AB3 ΔE 0.025
- Flat Blue #3C73A8 ΔE 0.048
- Windows Blue #3778BF ΔE 0.051
- Dusky Blue #475F94 ΔE 0.052
- Muted Blue #3B719F ΔE 0.054
- Iris #6258C4 ΔE 0.058
- Denim Blue #3B5B92 ΔE 0.060
Use #4165B5 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.