#3F65A2
Closest named color: French Blue (#436BAD). oklch(50.8% 0.107 259.5), rgb(63, 101, 162).
Aa
White text reads best on this color (5.84:1).
About this color
#3F65A2 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 51%, its chroma 0.107 and its hue 259°. 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 5.84:1.
| Hue family | Blues |
| Lightness | medium-dark (51%) |
| Chroma | moderately saturated (0.107) |
| Temperature | cool |
| Nearest name | French Blue (#436BAD) |
| Black text | 3.59:1 |
| White text | 5.84:1 |
Values
| HEX | #3F65A2 |
| RGB | rgb(63, 101, 162) |
| HSL | hsl(217, 44%, 44%) |
| OKLCH | oklch(50.8% 0.107 259.5) |
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 #3F65A2 | 5.84:1 | AA | Lc -84.3 | Fine for body text |
| Black text on #3F65A2 | 3.59:1 | AA large text | Lc 25.0 | Dividers and decoration only |
| #3F65A2 text on white | 5.84:1 | AA | Lc 79.0 | Fine for body text |
| #3F65A2 text on black | 3.59:1 | AA large text | Lc -22.8 | 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
#F3F6FA
oklch(97.2% 0.006 255.5)
-
Step 100
100
#E4EAF4
oklch(93.5% 0.015 260.7)
-
Step 200
200
#CEDAED
oklch(88.5% 0.029 259.6)
-
Step 300
300
#ADC2E3
oklch(80.9% 0.052 259.4)
-
Step 400
400
#82A2D4
oklch(70.7% 0.082 259.2)
-
Step 500
500
#628AC9
oklch(63.1% 0.106 259.2)
-
Step 600
600
#4973B6
oklch(55.6% 0.115 259.4)
-
Step 700
700 (this color)
#3F65A2
oklch(50.8% 0.107 259.5)
-
Step 800
800
#314F7F
oklch(42.8% 0.088 259.4)
-
Step 900
900
#2B4266
oklch(37.8% 0.068 259.1)
-
Step 950
950
#19273C
oklch(27.1% 0.044 258.3)
#3F65A2 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) | #4B6AA4 | 0.021 |
| Deuteranopia (no green cones) | #3E61A1 | 0.012 |
| Tritanopia (no blue cones) | #00737C | 0.091 |
| Achromatopsia (no color) | #656565 | 0.107 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F65A2
#3F65A2
oklch(50.8% 0.107 259.5)
- #855D00
#855D00
oklch(50.8% 0.105 79.4)
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 #3F65A2, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- French Blue #436BAD ΔE 0.023
- Dusky Blue #475F94 ΔE 0.025
- Mid Blue #276AB3 ΔE 0.032
- Denim #3B638C ΔE 0.036
- Denim Blue #3B5B92 ΔE 0.036
- Muted Blue #3B719F ΔE 0.036
- Flat Blue #3C73A8 ΔE 0.039
- Peacock Blue #016795 ΔE 0.045
Use #3F65A2 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.