#3F4EA0
Closest named color: Blueberry (#464196). oklch(45.6% 0.133 272.3), rgb(63, 78, 160).
Aa
White text reads best on this color (7.47:1).
About this color
#3F4EA0 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 46%, its chroma 0.133 and its hue 272°. Its hue sits on the cool side of the wheel. The nearest named color is Blueberry (#464196), ΔE 0.036 away. White text reads best on it, at 7.47:1.
| Hue family | Blues |
| Lightness | medium-dark (46%) |
| Chroma | moderately saturated (0.133) |
| Temperature | cool |
| Nearest name | Blueberry (#464196) |
| Black text | 2.80:1 |
| White text | 7.47:1 |
Values
| HEX | #3F4EA0 |
| RGB | rgb(63, 78, 160) |
| HSL | hsl(231, 43%, 44%) |
| OKLCH | oklch(45.6% 0.133 272.3) |
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 #3F4EA0 | 7.47:1 | AAA | Lc -90.6 | Preferred for body text |
| Black text on #3F4EA0 | 2.80:1 | Fails | Lc 18.3 | Dividers and decoration only |
| #3F4EA0 text on white | 7.47:1 | AAA | Lc 85.7 | Fine for body text |
| #3F4EA0 text on black | 2.80:1 | 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
#F3F5FD
oklch(97.1% 0.011 274.9)
-
Step 100
100
#E4E9F9
oklch(93.5% 0.022 272.1)
-
Step 200
200
#CFD8F7
oklch(88.5% 0.044 272.7)
-
Step 300
300
#AFBEF4
oklch(80.9% 0.078 272.5)
-
Step 400
400
#869BEE
oklch(70.8% 0.124 272.1)
-
Step 500
500
#6A7FE8
oklch(63% 0.159 272.6)
-
Step 600
600
#5366D7
oklch(55.6% 0.173 272.3)
-
Step 700
700
#4454BA
oklch(49.1% 0.161 272.4)
-
Step 800
800 (this color)
#3F4EA0
oklch(45.6% 0.133 272.3)
-
Step 900
900
#303B78
oklch(37.7% 0.104 272.8)
-
Step 950
950
#1C2346
oklch(27% 0.065 272.8)
#3F4EA0 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) | #2259A3 | 0.037 |
| Deuteranopia (no green cones) | #0C519E | 0.043 |
| Tritanopia (no blue cones) | #00616F | 0.117 |
| Achromatopsia (no color) | #555555 | 0.133 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F4EA0
#3F4EA0
oklch(45.6% 0.133 272.3)
- #6A5500
#6A5500
oklch(45.8% 0.094 92.2)
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 #3F4EA0, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blueberry #464196 ΔE 0.036
- Twilight #4E518B ΔE 0.042
- Dusk Blue #26538D ΔE 0.045
- Denim Blue #3B5B92 ΔE 0.046
- Cobalt #1E488F ΔE 0.051
- Dark Slate Blue #483D8B ΔE 0.053
- Dusky Blue #475F94 ΔE 0.057
- Light Navy Blue #2E5A88 ΔE 0.059
Use #3F4EA0 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.