#3F4D92
Closest named color: Twilight (#4E518B). oklch(44.5% 0.114 272.4), rgb(63, 77, 146).
Aa
White text reads best on this color (7.81:1).
About this color
#3F4D92 is a dark, moderately saturated blue. In OKLCH its lightness is 44%, its chroma 0.114 and its hue 272°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight (#4E518B), ΔE 0.029 away. White text reads best on it, at 7.81:1.
| Hue family | Blues |
| Lightness | dark (44%) |
| Chroma | moderately saturated (0.114) |
| Temperature | cool |
| Nearest name | Twilight (#4E518B) |
| Black text | 2.68:1 |
| White text | 7.81:1 |
Values
| HEX | #3F4D92 |
| RGB | rgb(63, 77, 146) |
| HSL | hsl(230, 40%, 41%) |
| OKLCH | oklch(44.5% 0.114 272.4) |
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 #3F4D92 | 7.81:1 | AAA | Lc -91.7 | Preferred for body text |
| Black text on #3F4D92 | 2.68:1 | Fails | Lc 17.1 | Dividers and decoration only |
| #3F4D92 text on white | 7.81:1 | AAA | Lc 86.9 | Fine for body text |
| #3F4D92 text on black | 2.68:1 | Fails | Lc -15.2 | 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
#E5E9F7
oklch(93.5% 0.019 273.2)
-
Step 200
200
#D0D8F2
oklch(88.4% 0.037 272)
-
Step 300
300
#B1BFEC
oklch(80.9% 0.066 271.4)
-
Step 400
400
#8A9CE3
oklch(70.7% 0.106 272.6)
-
Step 500
500
#6E82DB
oklch(63.1% 0.136 272.4)
-
Step 600
600
#576AC9
oklch(55.7% 0.148 272.3)
-
Step 700
700
#4758AE
oklch(49.2% 0.138 272)
-
Step 800
800 (this color)
#3F4D92
oklch(44.5% 0.114 272.4)
-
Step 900
900
#323D70
oklch(37.7% 0.088 272.4)
-
Step 950
950
#1D2442
oklch(27% 0.057 272.2)
#3F4D92 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) | #2E5695 | 0.029 |
| Deuteranopia (no green cones) | #234F91 | 0.031 |
| Tritanopia (no blue cones) | #105C68 | 0.101 |
| Achromatopsia (no color) | #525252 | 0.114 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F4D92
#3F4D92
oklch(44.5% 0.114 272.4)
- #665200
#665200
oklch(44.6% 0.091 92.5)
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 #3F4D92, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight #4E518B ΔE 0.029
- Dusk Blue #26538D ΔE 0.032
- Blueberry #464196 ΔE 0.033
- Denim Blue #3B5B92 ΔE 0.040
- Cobalt #1E488F ΔE 0.042
- Dark Slate Blue #483D8B ΔE 0.043
- Dusk #4E5481 ΔE 0.044
- Light Navy Blue #2E5A88 ΔE 0.046
Use #3F4D92 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.