#3F6ABC
Closest named color: French Blue (#436BAD). oklch(53.5% 0.137 262), rgb(63, 106, 188).
Aa
White text reads best on this color (5.25:1).
About this color
#3F6ABC is a medium-dark, moderately saturated blue. In OKLCH its lightness is 54%, its chroma 0.137 and its hue 262°. Its hue sits on the cool side of the wheel. The nearest named color is French Blue (#436BAD), ΔE 0.025 away. White text reads best on it, at 5.25:1.
| Hue family | Blues |
| Lightness | medium-dark (54%) |
| Chroma | moderately saturated (0.137) |
| Temperature | cool |
| Nearest name | French Blue (#436BAD) |
| Black text | 3.99:1 |
| White text | 5.25:1 |
Values
| HEX | #3F6ABC |
| RGB | rgb(63, 106, 188) |
| HSL | hsl(219, 50%, 49%) |
| OKLCH | oklch(53.5% 0.137 262) |
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 #3F6ABC | 5.25:1 | AA | Lc -81.2 | Fine for body text |
| Black text on #3F6ABC | 3.99:1 | AA large text | Lc 28.3 | Dividers and decoration only |
| #3F6ABC text on white | 5.25:1 | AA | Lc 75.8 | Fine for body text |
| #3F6ABC text on black | 3.99:1 | AA large text | Lc -25.9 | 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
#F2F6FB
oklch(97.2% 0.008 253.9)
-
Step 100
100
#E3EAF6
oklch(93.5% 0.018 261.3)
-
Step 200
200
#CDDAF1
oklch(88.6% 0.035 262)
-
Step 300
300
#ABC1E9
oklch(80.8% 0.062 262.3)
-
Step 400
400
#7FA1DF
oklch(70.8% 0.099 262)
-
Step 500
500
#5E88D6
oklch(63.1% 0.127 261.9)
-
Step 600
600 (this color)
#3F6ABC
oklch(53.5% 0.137 262)
-
Step 700
700
#365EA8
oklch(49.1% 0.127 261.5)
-
Step 800
800
#2D4D88
oklch(42.7% 0.105 261.6)
-
Step 900
900
#29406D
oklch(37.6% 0.083 262.6)
-
Step 950
950
#182640
oklch(27% 0.052 262)
#3F6ABC 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) | #4372BF | 0.023 |
| Deuteranopia (no green cones) | #2E67BA | 0.019 |
| Tritanopia (no blue cones) | #007D8A | 0.113 |
| Achromatopsia (no color) | #6C6C6C | 0.137 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F6ABC
#3F6ABC
oklch(53.5% 0.137 262)
- #8D6600
#8D6600
oklch(53.6% 0.11 82.2)
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 #3F6ABC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- French Blue #436BAD ΔE 0.025
- Mid Blue #276AB3 ΔE 0.026
- Windows Blue #3778BF ΔE 0.038
- Flat Blue #3C73A8 ΔE 0.044
- Muted Blue #3B719F ΔE 0.054
- Nice Blue #107AB0 ΔE 0.056
- Royal Blue #4169E1 ΔE 0.058
- Iris #6258C4 ΔE 0.062
Use #3F6ABC 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.