#3F4E82
Closest named color: Twilight (#4E518B). oklch(43.6% 0.088 270.3), rgb(63, 78, 130).
Aa
White text reads best on this color (8.00:1).
About this color
#3F4E82 is a dark, moderately saturated blue. In OKLCH its lightness is 44%, its chroma 0.088 and its hue 270°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight (#4E518B), ΔE 0.028 away. White text reads best on it, at 8.00:1.
| Hue family | Blues |
| Lightness | dark (44%) |
| Chroma | moderately saturated (0.088) |
| Temperature | cool |
| Nearest name | Twilight (#4E518B) |
| Black text | 2.62:1 |
| White text | 8.00:1 |
Values
| HEX | #3F4E82 |
| RGB | rgb(63, 78, 130) |
| HSL | hsl(227, 35%, 38%) |
| OKLCH | oklch(43.6% 0.088 270.3) |
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 #3F4E82 | 8.00:1 | AAA | Lc -92.3 | Preferred for body text |
| Black text on #3F4E82 | 2.62:1 | Fails | Lc 16.4 | Dividers and decoration only |
| #3F4E82 text on white | 8.00:1 | AAA | Lc 87.6 | Fine for body text |
| #3F4E82 text on black | 2.62:1 | Fails | Lc -14.5 | Not readable |
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 800.
-
Step 50
50
#F3F5FA
oklch(97% 0.007 268.5)
-
Step 100
100
#E6EAF4
oklch(93.7% 0.014 268.5)
-
Step 200
200
#D2D9ED
oklch(88.6% 0.029 270.4)
-
Step 300
300
#B4C0E3
oklch(81% 0.051 270.3)
-
Step 400
400
#8D9ED5
oklch(70.7% 0.083 270.9)
-
Step 500
500
#7186C9
oklch(63.2% 0.104 270)
-
Step 600
600
#5A6EB6
oklch(55.5% 0.115 270.6)
-
Step 700
700
#4A5C9D
oklch(49.1% 0.106 270.4)
-
Step 800
800 (this color)
#3F4E82
oklch(43.6% 0.088 270.3)
-
Step 900
900
#343F66
oklch(37.7% 0.069 270.9)
-
Step 950
950
#1E253C
oklch(27% 0.044 270.3)
#3F4E82 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) | #3A5484 | 0.017 |
| Deuteranopia (no green cones) | #334E81 | 0.016 |
| Tritanopia (no blue cones) | #235961 | 0.079 |
| Achromatopsia (no color) | #505050 | 0.088 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F4E82
#3F4E82
oklch(43.6% 0.088 270.3)
- #644F03
#644F03
oklch(43.7% 0.088 90.7)
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 #3F4E82, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight #4E518B ΔE 0.028
- Dusk #4E5481 ΔE 0.030
- Dusk Blue #26538D ΔE 0.032
- Light Navy Blue #2E5A88 ΔE 0.037
- Light Navy #155084 ΔE 0.040
- Denim Blue #3B5B92 ΔE 0.041
- YInMn Blue #415A77 ΔE 0.045
- Deep Sea Blue #015482 ΔE 0.048
Use #3F4E82 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.