#3D3F7E
Closest named color: Dark Slate Blue (#483D8B). oklch(40% 0.104 279.2), rgb(61, 63, 126).
Aa
White text reads best on this color (9.49:1).
About this color
#3D3F7E is a dark, moderately saturated blue. In OKLCH its lightness is 40%, its chroma 0.104 and its hue 279°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.029 away. White text reads best on it, at 9.49:1.
| Hue family | Blues |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.104) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.21:1 |
| White text | 9.49:1 |
Values
| HEX | #3D3F7E |
| RGB | rgb(61, 63, 126) |
| HSL | hsl(238, 35%, 37%) |
| OKLCH | oklch(40% 0.104 279.2) |
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 #3D3F7E | 9.49:1 | AAA | Lc -96.1 | Preferred for body text |
| Black text on #3D3F7E | 2.21:1 | Fails | Lc 12.1 | Not readable |
| #3D3F7E text on white | 9.49:1 | AAA | Lc 91.8 | Preferred for body text |
| #3D3F7E text on black | 2.21:1 | Fails | Lc -10.6 | 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 900.
-
Step 50
50
#F4F5FD
oklch(97.2% 0.011 280.5)
-
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
#B5BCF3
oklch(80.9% 0.078 278.9)
-
Step 400
400
#9097ED
oklch(70.6% 0.125 279.1)
-
Step 500
500
#777BE7
oklch(63.1% 0.16 279.2)
-
Step 600
600
#6261D5
oklch(55.5% 0.174 279.5)
-
Step 700
700
#5150B9
oklch(49.1% 0.161 279.1)
-
Step 800
800
#424296
oklch(42.7% 0.134 279.1)
-
Step 900
900 (this color)
#3D3F7E
oklch(40% 0.104 279.2)
-
Step 950
950
#202246
oklch(27.1% 0.066 278.6)
#3D3F7E 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) | #234880 | 0.038 |
| Deuteranopia (no green cones) | #1D437D | 0.039 |
| Tritanopia (no blue cones) | #244D58 | 0.092 |
| Achromatopsia (no color) | #464646 | 0.104 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3D3F7E
#3D3F7E
oklch(40% 0.104 279.2)
- #534800
#534800
oklch(40.1% 0.083 99.3)
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 #3D3F7E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.029
- Blueberry #464196 ΔE 0.043
- Cobalt #1E488F ΔE 0.046
- Twilight Blue #0A437A ΔE 0.052
- Light Navy #155084 ΔE 0.058
- Dusk Blue #26538D ΔE 0.060
- Twilight #4E518B ΔE 0.061
- Dusk #4E5481 ΔE 0.068
Use #3D3F7E 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.