#3F68A6
Closest named color: French Blue (#436BAD). oklch(51.7% 0.109 258.4), rgb(63, 104, 166).
Aa
White text reads best on this color (5.61:1).
About this color
#3F68A6 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 52%, its chroma 0.109 and its hue 258°. Its hue sits on the cool side of the wheel. The nearest named color is French Blue (#436BAD), ΔE 0.014 away. White text reads best on it, at 5.61:1.
| Hue family | Blues |
| Lightness | medium-dark (52%) |
| Chroma | moderately saturated (0.109) |
| Temperature | cool |
| Nearest name | French Blue (#436BAD) |
| Black text | 3.74:1 |
| White text | 5.61:1 |
Values
| HEX | #3F68A6 |
| RGB | rgb(63, 104, 166) |
| HSL | hsl(216, 45%, 45%) |
| OKLCH | oklch(51.7% 0.109 258.4) |
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 #3F68A6 | 5.61:1 | AA | Lc -83.2 | Fine for body text |
| Black text on #3F68A6 | 3.74:1 | AA large text | Lc 26.2 | Dividers and decoration only |
| #3F68A6 text on white | 5.61:1 | AA | Lc 77.9 | Fine for body text |
| #3F68A6 text on black | 3.74:1 | AA large text | Lc -23.9 | 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 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
#ACC2E3
oklch(80.8% 0.053 258.4)
-
Step 400
400
#80A2D5
oklch(70.6% 0.084 258.3)
-
Step 500
500
#608ACA
oklch(63% 0.108 258.6)
-
Step 600
600
#4673B7
oklch(55.5% 0.117 258.4)
-
Step 700
700 (this color)
#3F68A6
oklch(51.7% 0.109 258.4)
-
Step 800
800
#2F4F80
oklch(42.8% 0.09 258.7)
-
Step 900
900
#2A4267
oklch(37.8% 0.07 258.8)
-
Step 950
950
#19273C
oklch(27.1% 0.044 258.3)
#3F68A6 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) | #4D6DA9 | 0.023 |
| Deuteranopia (no green cones) | #3F63A5 | 0.014 |
| Tritanopia (no blue cones) | #00767F | 0.092 |
| Achromatopsia (no color) | #686868 | 0.109 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F68A6
#3F68A6
oklch(51.7% 0.109 258.4)
- #895F00
#895F00
oklch(51.7% 0.108 78.6)
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 #3F68A6, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- French Blue #436BAD ΔE 0.014
- Mid Blue #276AB3 ΔE 0.027
- Muted Blue #3B719F ΔE 0.031
- Flat Blue #3C73A8 ΔE 0.031
- Dusky Blue #475F94 ΔE 0.034
- Denim #3B638C ΔE 0.042
- Denim Blue #3B5B92 ΔE 0.046
- Ocean Blue #03719C ΔE 0.046
Use #3F68A6 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.