#3F4E95
Closest named color: Twilight (#4E518B). oklch(44.9% 0.117 272), rgb(63, 78, 149).
Aa
White text reads best on this color (7.67:1).
About this color
#3F4E95 is a dark, moderately saturated blue. In OKLCH its lightness is 45%, its chroma 0.117 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 7.67:1.
| Hue family | Blues |
| Lightness | dark (45%) |
| Chroma | moderately saturated (0.117) |
| Temperature | cool |
| Nearest name | Twilight (#4E518B) |
| Black text | 2.73:1 |
| White text | 7.67:1 |
Values
| HEX | #3F4E95 |
| RGB | rgb(63, 78, 149) |
| HSL | hsl(230, 41%, 42%) |
| OKLCH | oklch(44.9% 0.117 272) |
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 #3F4E95 | 7.67:1 | AAA | Lc -91.3 | Preferred for body text |
| Black text on #3F4E95 | 2.73:1 | Fails | Lc 17.5 | Dividers and decoration only |
| #3F4E95 text on white | 7.67:1 | AAA | Lc 86.5 | Fine for body text |
| #3F4E95 text on black | 2.73:1 | Fails | Lc -15.6 | 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
#E5E9F8
oklch(93.5% 0.021 274)
-
Step 200
200
#D0D8F3
oklch(88.5% 0.038 272.5)
-
Step 300
300
#B1BFEE
oklch(81% 0.068 271.9)
-
Step 400
400
#899CE5
oklch(70.7% 0.109 272.2)
-
Step 500
500
#6C82DD
oklch(63.1% 0.139 271.7)
-
Step 600
600
#5569CB
oklch(55.5% 0.152 271.9)
-
Step 700
700
#4657B0
oklch(49.1% 0.142 272)
-
Step 800
800 (this color)
#3F4E95
oklch(44.9% 0.117 272)
-
Step 900
900
#313D71
oklch(37.7% 0.09 271.7)
-
Step 950
950
#1D2442
oklch(27% 0.057 272.2)
#3F4E95 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) | #2D5798 | 0.029 |
| Deuteranopia (no green cones) | #215093 | 0.032 |
| Tritanopia (no blue cones) | #095E6A | 0.105 |
| Achromatopsia (no color) | #535353 | 0.117 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F4E95
#3F4E95
oklch(44.9% 0.117 272)
- #675300
#675300
oklch(45% 0.092 92.7)
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 #3F4E95, 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 0.033
- Blueberry #464196 ΔE 0.035
- Denim Blue #3B5B92 ΔE 0.038
- Cobalt #1E488F ΔE 0.044
- Dusk #4E5481 ΔE 0.046
- Dark Slate Blue #483D8B ΔE 0.046
- Light Navy Blue #2E5A88 ΔE 0.047
Use #3F4E95 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.