#3F5194
Closest named color: Twilight (#4E518B). oklch(45.5% 0.111 270.2), rgb(63, 81, 148).
Aa
White text reads best on this color (7.45:1).
About this color
#3F5194 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 45%, its chroma 0.111 and its hue 270°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight (#4E518B), ΔE 0.025 away. White text reads best on it, at 7.45:1.
| Hue family | Blues |
| Lightness | medium-dark (45%) |
| Chroma | moderately saturated (0.111) |
| Temperature | cool |
| Nearest name | Twilight (#4E518B) |
| Black text | 2.81:1 |
| White text | 7.45:1 |
Values
| HEX | #3F5194 |
| RGB | rgb(63, 81, 148) |
| HSL | hsl(227, 40%, 41%) |
| OKLCH | oklch(45.5% 0.111 270.2) |
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 #3F5194 | 7.45:1 | AAA | Lc -90.6 | Preferred for body text |
| Black text on #3F5194 | 2.81:1 | Fails | Lc 18.3 | Dividers and decoration only |
| #3F5194 text on white | 7.45:1 | AAA | Lc 85.7 | Fine for body text |
| #3F5194 text on black | 2.81:1 | Fails | Lc -16.3 | 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 800.
-
Step 50
50
#F3F5FC
oklch(97.1% 0.01 273.4)
-
Step 100
100
#E5EAF7
oklch(93.7% 0.018 269.1)
-
Step 200
200
#D0D9F2
oklch(88.6% 0.036 269.9)
-
Step 300
300
#B0BFEC
oklch(80.9% 0.066 270.5)
-
Step 400
400
#879DE2
oklch(70.6% 0.104 270.1)
-
Step 500
500
#6B83DA
oklch(63.1% 0.134 270.5)
-
Step 600
600
#536BC7
oklch(55.5% 0.145 270.1)
-
Step 700
700
#4459AC
oklch(49.1% 0.134 270.2)
-
Step 800
800 (this color)
#3F5194
oklch(45.5% 0.111 270.2)
-
Step 900
900
#303E6F
oklch(37.7% 0.086 269.9)
-
Step 950
950
#1C2441
oklch(26.9% 0.055 270.7)
#3F5194 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) | #335997 | 0.024 |
| Deuteranopia (no green cones) | #285193 | 0.026 |
| Tritanopia (no blue cones) | #0A606B | 0.100 |
| Achromatopsia (no color) | #555555 | 0.111 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F5194
#3F5194
oklch(45.5% 0.111 270.2)
- #6A5300
#6A5300
oklch(45.3% 0.093 90.1)
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 #3F5194, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight #4E518B ΔE 0.025
- Denim Blue #3B5B92 ΔE 0.029
- Dusk Blue #26538D ΔE 0.030
- Light Navy Blue #2E5A88 ΔE 0.039
- Dusk #4E5481 ΔE 0.040
- Dusky Blue #475F94 ΔE 0.043
- Blueberry #464196 ΔE 0.043
- Cobalt #1E488F ΔE 0.048
Use #3F5194 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.