#3D4289
Closest named color: Dark Slate Blue (#483D8B). oklch(41.4% 0.116 277), rgb(61, 66, 137).
Aa
White text reads best on this color (8.97:1).
About this color
#3D4289 is a dark, moderately saturated blue. In OKLCH its lightness is 41%, its chroma 0.116 and its hue 277°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.021 away. White text reads best on it, at 8.97:1.
| Hue family | Blues |
| Lightness | dark (41%) |
| Chroma | moderately saturated (0.116) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.33:1 |
| White text | 8.97:1 |
Values
| HEX | #3D4289 |
| RGB | rgb(61, 66, 137) |
| HSL | hsl(236, 38%, 39%) |
| OKLCH | oklch(41.4% 0.116 277) |
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 #3D4289 | 8.97:1 | AAA | Lc -94.8 | Preferred for body text |
| Black text on #3D4289 | 2.33:1 | Fails | Lc 13.6 | Not readable |
| #3D4289 text on white | 8.97:1 | AAA | Lc 90.4 | Preferred for body text |
| #3D4289 text on black | 2.33:1 | Fails | Lc -11.9 | 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
#F4F5FC
oklch(97.1% 0.009 279.7)
-
Step 100
100
#E6E9F7
oklch(93.6% 0.019 276.3)
-
Step 200
200
#D2D7F3
oklch(88.4% 0.039 277.6)
-
Step 300
300
#B5BDED
oklch(80.9% 0.068 277.4)
-
Step 400
400
#8F9AE4
oklch(70.7% 0.109 276.8)
-
Step 500
500
#757FDC
oklch(63% 0.139 277)
-
Step 600
600
#5F67CA
oklch(55.7% 0.151 276.8)
-
Step 700
700
#4F55AE
oklch(49.1% 0.14 277.1)
-
Step 800
800 (this color)
#3D4289
oklch(41.4% 0.116 277)
-
Step 900
900
#363B71
oklch(37.6% 0.092 277.1)
-
Step 950
950
#202342
oklch(27% 0.057 277.6)
#3D4289 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) | #1E4C8C | 0.040 |
| Deuteranopia (no green cones) | #144687 | 0.044 |
| Tritanopia (no blue cones) | #19525F | 0.102 |
| Achromatopsia (no color) | #494949 | 0.117 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3D4289
#3D4289
oklch(41.4% 0.116 277)
- #594B00
#594B00
oklch(41.5% 0.085 96.8)
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 #3D4289, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.021
- Blueberry #464196 ΔE 0.026
- Cobalt #1E488F ΔE 0.037
- Dusk Blue #26538D ΔE 0.050
- Twilight #4E518B ΔE 0.052
- Light Navy #155084 ΔE 0.054
- Twilight Blue #0A437A ΔE 0.058
- Dusk #4E5481 ΔE 0.064
Use #3D4289 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.