#3D3E8F
Closest named color: Dark Slate Blue (#483D8B). oklch(41% 0.131 278.4), rgb(61, 62, 143).
Aa
White text reads best on this color (9.19:1).
About this color
#3D3E8F is a dark, moderately saturated blue. In OKLCH its lightness is 41%, its chroma 0.131 and its hue 278°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.019 away. White text reads best on it, at 9.19:1.
| Hue family | Blues |
| Lightness | dark (41%) |
| Chroma | moderately saturated (0.131) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.28:1 |
| White text | 9.19:1 |
Values
| HEX | #3D3E8F |
| RGB | rgb(61, 62, 143) |
| HSL | hsl(239, 40%, 40%) |
| OKLCH | oklch(41% 0.131 278.4) |
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 #3D3E8F | 9.19:1 | AAA | Lc -95.3 | Preferred for body text |
| Black text on #3D3E8F | 2.28:1 | Fails | Lc 13.1 | Not readable |
| #3D3E8F text on white | 9.19:1 | AAA | Lc 90.9 | Preferred for body text |
| #3D3E8F text on black | 2.28:1 | Fails | Lc -11.4 | 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
#E6E9F9
oklch(93.6% 0.022 277.5)
-
Step 200
200
#D2D7F6
oklch(88.5% 0.043 278.2)
-
Step 300
300
#B5BCF2
oklch(80.9% 0.077 278.8)
-
Step 400
400
#9098EC
oklch(70.7% 0.123 278.6)
-
Step 500
500
#767CE6
oklch(63.1% 0.157 278.4)
-
Step 600
600
#6063D4
oklch(55.7% 0.17 278.2)
-
Step 700
700
#5051B7
oklch(49.1% 0.157 278.5)
-
Step 800
800 (this color)
#3D3E8F
oklch(41% 0.131 278.4)
-
Step 900
900
#373976
oklch(37.6% 0.102 278.9)
-
Step 950
950
#202245
oklch(27% 0.064 278.7)
#3D3E8F 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) | #054B92 | 0.054 |
| Deuteranopia (no green cones) | #00448D | 0.054 |
| Tritanopia (no blue cones) | #115160 | 0.114 |
| Achromatopsia (no color) | #484848 | 0.131 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3D3E8F
#3D3E8F
oklch(41% 0.131 278.4)
- #574A00
#574A00
oklch(41% 0.085 97.6)
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 #3D3E8F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.019
- Blueberry #464196 ΔE 0.020
- Cobalt #1E488F ΔE 0.041
- Dusk Blue #26538D ΔE 0.060
- Sapphire #2138AB ΔE 0.061
- Twilight #4E518B ΔE 0.062
- Twilight Blue #0A437A ΔE 0.064
- Light Navy #155084 ΔE 0.065
Use #3D3E8F 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.