#3B4291
Closest named color: Blueberry (#464196). oklch(41.8% 0.129 275.5), rgb(59, 66, 145).
Aa
White text reads best on this color (8.84:1).
About this color
#3B4291 is a dark, moderately saturated blue. In OKLCH its lightness is 42%, its chroma 0.129 and its hue 276°. Its hue sits on the cool side of the wheel. The nearest named color is Blueberry (#464196), ΔE 0.019 away. White text reads best on it, at 8.84:1.
| Hue family | Blues |
| Lightness | dark (42%) |
| Chroma | moderately saturated (0.129) |
| Temperature | cool |
| Nearest name | Blueberry (#464196) |
| Black text | 2.37:1 |
| White text | 8.84:1 |
Values
| HEX | #3B4291 |
| RGB | rgb(59, 66, 145) |
| HSL | hsl(235, 42%, 40%) |
| OKLCH | oklch(41.8% 0.129 275.5) |
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 #3B4291 | 8.84:1 | AAA | Lc -94.4 | Preferred for body text |
| Black text on #3B4291 | 2.37:1 | Fails | Lc 14.0 | Not readable |
| #3B4291 text on white | 8.84:1 | AAA | Lc 90.0 | Fine for body text |
| #3B4291 text on black | 2.37:1 | Fails | Lc -12.3 | 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
#F3F5FC
oklch(97.1% 0.01 273.4)
-
Step 100
100
#E5E9F9
oklch(93.6% 0.022 274.7)
-
Step 200
200
#D1D8F5
oklch(88.6% 0.041 274.8)
-
Step 300
300
#B2BDF2
oklch(80.8% 0.076 275.5)
-
Step 400
400
#8C9AEB
oklch(70.8% 0.119 275.5)
-
Step 500
500
#717EE5
oklch(63.1% 0.154 275.7)
-
Step 600
600
#5B65D3
oklch(55.6% 0.167 275.6)
-
Step 700
700
#4B53B7
oklch(49.1% 0.156 275.6)
-
Step 800
800 (this color)
#3B4291
oklch(41.8% 0.129 275.5)
-
Step 900
900
#343B76
oklch(37.8% 0.1 275.5)
-
Step 950
950
#1E2345
oklch(27.1% 0.063 275.1)
#3B4291 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) | #124E94 | 0.046 |
| Deuteranopia (no green cones) | #00478F | 0.049 |
| Tritanopia (no blue cones) | #005463 | 0.113 |
| Achromatopsia (no color) | #4A4A4A | 0.129 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3B4291
#3B4291
oklch(41.8% 0.129 275.5)
- #5B4C00
#5B4C00
oklch(41.9% 0.086 96)
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 #3B4291, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blueberry #464196 ΔE 0.019
- Dark Slate Blue #483D8B ΔE 0.024
- Cobalt #1E488F ΔE 0.034
- Dusk Blue #26538D ΔE 0.051
- Twilight #4E518B ΔE 0.055
- Light Navy #155084 ΔE 0.057
- Sapphire #2138AB ΔE 0.060
- Twilight Blue #0A437A ΔE 0.063
Use #3B4291 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.