#3E407A
Closest named color: Dark Slate Blue (#483D8B). oklch(40% 0.096 279.6), rgb(62, 64, 122).
Aa
White text reads best on this color (9.46:1).
About this color
#3E407A is a dark, moderately saturated blue. In OKLCH its lightness is 40%, its chroma 0.096 and its hue 280°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.034 away. White text reads best on it, at 9.46:1.
| Hue family | Blues |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.096) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.21:1 |
| White text | 9.46:1 |
Values
| HEX | #3E407A |
| RGB | rgb(62, 64, 122) |
| HSL | hsl(238, 33%, 36%) |
| OKLCH | oklch(40% 0.096 279.6) |
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 #3E407A | 9.46:1 | AAA | Lc -96.0 | Preferred for body text |
| Black text on #3E407A | 2.21:1 | Fails | Lc 12.2 | Not readable |
| #3E407A text on white | 9.46:1 | AAA | Lc 91.7 | Preferred for body text |
| #3E407A 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
#F4F5FC
oklch(97.1% 0.009 279.7)
-
Step 100
100
#E7E9F8
oklch(93.7% 0.02 279.9)
-
Step 200
200
#D3D7F4
oklch(88.5% 0.04 279.3)
-
Step 300
300
#B6BCEF
oklch(80.8% 0.072 279.4)
-
Step 400
400
#9298E7
oklch(70.6% 0.115 279.7)
-
Step 500
500
#797DE0
oklch(63.2% 0.147 279.6)
-
Step 600
600
#6364CE
oklch(55.7% 0.16 279.5)
-
Step 700
700
#5252B2
oklch(49.1% 0.149 279.4)
-
Step 800
800
#434490
oklch(42.7% 0.123 279.3)
-
Step 900
900 (this color)
#3E407A
oklch(40% 0.096 279.6)
-
Step 950
950
#212243
oklch(26.9% 0.061 280.2)
#3E407A 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) | #28487C | 0.034 |
| Deuteranopia (no green cones) | #244479 | 0.034 |
| Tritanopia (no blue cones) | #294C57 | 0.083 |
| Achromatopsia (no color) | #464646 | 0.096 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3E407A
#3E407A
oklch(40% 0.096 279.6)
- #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 #3E407A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.034
- Blueberry #464196 ΔE 0.048
- Cobalt #1E488F ΔE 0.050
- Twilight Blue #0A437A ΔE 0.052
- Light Navy #155084 ΔE 0.057
- Twilight #4E518B ΔE 0.060
- Dusk Blue #26538D ΔE 0.060
- Dusk #4E5481 ΔE 0.065
Use #3E407A 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.