#3F62AB
Closest named color: French Blue (#436BAD). oklch(50.7% 0.123 263.4), rgb(63, 98, 171).
Aa
White text reads best on this color (5.92:1).
About this color
#3F62AB is a medium-dark, moderately saturated blue. In OKLCH its lightness is 51%, its chroma 0.123 and its hue 263°. Its hue sits on the cool side of the wheel. The nearest named color is French Blue (#436BAD), ΔE 0.026 away. White text reads best on it, at 5.92:1.
| Hue family | Blues |
| Lightness | medium-dark (51%) |
| Chroma | moderately saturated (0.123) |
| Temperature | cool |
| Nearest name | French Blue (#436BAD) |
| Black text | 3.54:1 |
| White text | 5.92:1 |
Values
| HEX | #3F62AB |
| RGB | rgb(63, 98, 171) |
| HSL | hsl(221, 46%, 46%) |
| OKLCH | oklch(50.7% 0.123 263.4) |
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 #3F62AB | 5.92:1 | AA | Lc -84.6 | Fine for body text |
| Black text on #3F62AB | 3.54:1 | AA large text | Lc 24.7 | Dividers and decoration only |
| #3F62AB text on white | 5.92:1 | AA | Lc 79.4 | Fine for body text |
| #3F62AB text on black | 3.54:1 | AA large text | Lc -22.4 | 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 700.
-
Step 50
50
#F3F5FB
oklch(97% 0.008 271.3)
-
Step 100
100
#E4EAF6
oklch(93.6% 0.017 264.5)
-
Step 200
200
#CEDAF0
oklch(88.6% 0.033 262.7)
-
Step 300
300
#ADC1E8
oklch(80.9% 0.06 263.7)
-
Step 400
400
#82A0DD
oklch(70.7% 0.096 263.9)
-
Step 500
500
#6288D3
oklch(63.2% 0.121 263)
-
Step 600
600
#4970C0
oklch(55.6% 0.132 263.2)
-
Step 700
700 (this color)
#3F62AB
oklch(50.7% 0.123 263.4)
-
Step 800
800
#314D86
oklch(42.8% 0.101 263.1)
-
Step 900
900
#2B406C
oklch(37.7% 0.08 263.7)
-
Step 950
950
#19263F
oklch(27% 0.05 262.6)
#3F62AB 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) | #4169AE | 0.020 |
| Deuteranopia (no green cones) | #315FA9 | 0.018 |
| Tritanopia (no blue cones) | #00737E | 0.105 |
| Achromatopsia (no color) | #646464 | 0.123 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F62AB
#3F62AB
oklch(50.7% 0.123 263.4)
- #825F00
#825F00
oklch(50.8% 0.104 83.4)
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 #3F62AB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- French Blue #436BAD ΔE 0.026
- Mid Blue #276AB3 ΔE 0.028
- Dusky Blue #475F94 ΔE 0.037
- Denim Blue #3B5B92 ΔE 0.043
- Flat Blue #3C73A8 ΔE 0.050
- Muted Blue #3B719F ΔE 0.051
- Denim #3B638C ΔE 0.052
- Peacock Blue #016795 ΔE 0.056
Use #3F62AB 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.