#3E408C
Closest named color: Dark Slate Blue (#483D8B). oklch(41.3% 0.123 278.4), rgb(62, 64, 140).
Aa
White text reads best on this color (9.06:1).
About this color
#3E408C is a dark, moderately saturated blue. In OKLCH its lightness is 41%, its chroma 0.123 and its hue 278°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.017 away. White text reads best on it, at 9.06:1.
| Hue family | Blues |
| Lightness | dark (41%) |
| Chroma | moderately saturated (0.123) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.31:1 |
| White text | 9.06:1 |
Values
| HEX | #3E408C |
| RGB | rgb(62, 64, 140) |
| HSL | hsl(238, 39%, 40%) |
| OKLCH | oklch(41.3% 0.123 278.4) |
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 #3E408C | 9.06:1 | AAA | Lc -95.0 | Preferred for body text |
| Black text on #3E408C | 2.31:1 | Fails | Lc 13.4 | Not readable |
| #3E408C text on white | 9.06:1 | AAA | Lc 90.6 | Preferred for body text |
| #3E408C text on black | 2.31:1 | Fails | Lc -11.7 | 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
#E6E9F8
oklch(93.6% 0.02 276.9)
-
Step 200
200
#D3D7F4
oklch(88.5% 0.04 279.3)
-
Step 300
300
#B5BDEF
oklch(80.9% 0.071 277.6)
-
Step 400
400
#9099E8
oklch(70.7% 0.116 278)
-
Step 500
500
#777DE1
oklch(63.1% 0.149 278.6)
-
Step 600
600
#6164CE
oklch(55.5% 0.16 278.6)
-
Step 700
700
#5053B3
oklch(49.2% 0.149 278)
-
Step 800
800 (this color)
#3E408C
oklch(41.3% 0.123 278.4)
-
Step 900
900
#373A73
oklch(37.6% 0.096 278.5)
-
Step 950
950
#202244
oklch(26.9% 0.063 278.8)
#3E408C 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) | #154C8F | 0.049 |
| Deuteranopia (no green cones) | #07468A | 0.052 |
| Tritanopia (no blue cones) | #19515F | 0.108 |
| Achromatopsia (no color) | #494949 | 0.124 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3E408C
#3E408C
oklch(41.3% 0.123 278.4)
- #574B00
#574B00
oklch(41.2% 0.085 98.7)
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 #3E408C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.017
- Blueberry #464196 ΔE 0.021
- Cobalt #1E488F ΔE 0.040
- Dusk Blue #26538D ΔE 0.056
- Twilight #4E518B ΔE 0.056
- Light Navy #155084 ΔE 0.060
- Twilight Blue #0A437A ΔE 0.062
- Sapphire #2138AB ΔE 0.067
Use #3E408C 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.