#3D428F
Closest named color: Blueberry (#464196). oklch(41.8% 0.125 276.7), rgb(61, 66, 143).
Aa
White text reads best on this color (8.84:1).
About this color
#3D428F is a dark, moderately saturated blue. In OKLCH its lightness is 42%, its chroma 0.125 and its hue 277°. Its hue sits on the cool side of the wheel. The nearest named color is Blueberry (#464196), ΔE 0.018 away. White text reads best on it, at 8.84:1.
| Hue family | Blues |
| Lightness | dark (42%) |
| Chroma | moderately saturated (0.125) |
| Temperature | cool |
| Nearest name | Blueberry (#464196) |
| Black text | 2.37:1 |
| White text | 8.84:1 |
Values
| HEX | #3D428F |
| RGB | rgb(61, 66, 143) |
| HSL | hsl(236, 40%, 40%) |
| OKLCH | oklch(41.8% 0.125 276.7) |
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 #3D428F | 8.84:1 | AAA | Lc -94.5 | Preferred for body text |
| Black text on #3D428F | 2.37:1 | Fails | Lc 14.0 | Not readable |
| #3D428F text on white | 8.84:1 | AAA | Lc 90.0 | Fine for body text |
| #3D428F 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
#E6E9F8
oklch(93.6% 0.02 276.9)
-
Step 200
200
#D2D7F5
oklch(88.5% 0.042 278)
-
Step 300
300
#B4BDF0
oklch(80.9% 0.073 276.8)
-
Step 400
400
#8E99E9
oklch(70.7% 0.117 277)
-
Step 500
500
#747EE2
oklch(63.1% 0.149 276.9)
-
Step 600
600
#5D65D0
oklch(55.6% 0.163 276.5)
-
Step 700
700
#4D53B4
oklch(49% 0.151 276.6)
-
Step 800
800 (this color)
#3D428F
oklch(41.8% 0.125 276.7)
-
Step 900
900
#353A74
oklch(37.6% 0.098 276.9)
-
Step 950
950
#1F2344
oklch(27.1% 0.061 276.3)
#3D428F 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) | #164E92 | 0.046 |
| Deuteranopia (no green cones) | #05478D | 0.050 |
| Tritanopia (no blue cones) | #105462 | 0.110 |
| Achromatopsia (no color) | #4A4A4A | 0.126 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3D428F
#3D428F
oklch(41.8% 0.125 276.7)
- #5A4C00
#5A4C00
oklch(41.8% 0.086 96.9)
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 #3D428F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blueberry #464196 ΔE 0.018
- Dark Slate Blue #483D8B ΔE 0.021
- Cobalt #1E488F ΔE 0.036
- Dusk Blue #26538D ΔE 0.051
- Twilight #4E518B ΔE 0.053
- Light Navy #155084 ΔE 0.057
- Twilight Blue #0A437A ΔE 0.063
- Sapphire #2138AB ΔE 0.065
Use #3D428F 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.