#3F4098
Closest named color: Blueberry (#464196). oklch(42.3% 0.141 278), rgb(63, 64, 152).
Aa
White text reads best on this color (8.75:1).
About this color
#3F4098 is a dark, vivid blue. In OKLCH its lightness is 42%, its chroma 0.141 and its hue 278°. Its hue sits on the cool side of the wheel. The nearest named color is Blueberry (#464196), ΔE 0.012 away. White text reads best on it, at 8.75:1.
| Hue family | Blues |
| Lightness | dark (42%) |
| Chroma | vivid (0.141) |
| Temperature | cool |
| Nearest name | Blueberry (#464196) |
| Black text | 2.39:1 |
| White text | 8.75:1 |
Values
| HEX | #3F4098 |
| RGB | rgb(63, 64, 152) |
| HSL | hsl(239, 41%, 42%) |
| OKLCH | oklch(42.3% 0.141 278) |
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 #3F4098 | 8.75:1 | AAA | Lc -94.2 | Preferred for body text |
| Black text on #3F4098 | 2.39:1 | Fails | Lc 14.3 | Not readable |
| #3F4098 text on white | 8.75:1 | AAA | Lc 89.7 | Fine for body text |
| #3F4098 text on black | 2.39:1 | Fails | Lc -12.6 | 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
#F3F5FD
oklch(97.1% 0.011 274.9)
-
Step 100
100
#E6E9FA
oklch(93.7% 0.023 277.9)
-
Step 200
200
#D1D7F8
oklch(88.5% 0.046 277.3)
-
Step 300
300
#B4BCF6
oklch(80.9% 0.082 278.3)
-
Step 400
400
#8E97F1
oklch(70.7% 0.131 278.1)
-
Step 500
500
#747AEC
oklch(63% 0.168 278.1)
-
Step 600
600
#5F60DB
oklch(55.6% 0.184 278.3)
-
Step 700
700
#4F4FBE
oklch(49.2% 0.17 278.1)
-
Step 800
800 (this color)
#3F4098
oklch(42.3% 0.141 278)
-
Step 900
900
#36387A
oklch(37.7% 0.11 278.4)
-
Step 950
950
#1F2247
oklch(27.1% 0.068 277.3)
#3F4098 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) | #004E9B | 0.057 |
| Deuteranopia (no green cones) | #004796 | 0.054 |
| Tritanopia (no blue cones) | #085565 | 0.123 |
| Achromatopsia (no color) | #4B4B4B | 0.141 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F4098
#3F4098
oklch(42.3% 0.141 278)
- #5B4E00
#5B4E00
oklch(42.4% 0.088 98.1)
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 #3F4098, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blueberry #464196 ΔE 0.012
- Dark Slate Blue #483D8B ΔE 0.026
- Cobalt #1E488F ΔE 0.044
- Sapphire #2138AB ΔE 0.055
- Twilight #4E518B ΔE 0.060
- Dusk Blue #26538D ΔE 0.060
- Light Navy #155084 ΔE 0.069
- Rebecca Purple #663399 ΔE 0.071
Use #3F4098 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.