#3E4271
Closest named color: Dark Slate Blue (#483D8B). oklch(39.8% 0.079 278.5), rgb(62, 66, 113).
Aa
White text reads best on this color (9.44:1).
About this color
#3E4271 is a dark, moderately saturated blue. In OKLCH its lightness is 40%, its chroma 0.079 and its hue 278°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.050 away. White text reads best on it, at 9.44:1.
| Hue family | Blues |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.079) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.22:1 |
| White text | 9.44:1 |
Values
| HEX | #3E4271 |
| RGB | rgb(62, 66, 113) |
| HSL | hsl(235, 29%, 34%) |
| OKLCH | oklch(39.8% 0.079 278.5) |
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 #3E4271 | 9.44:1 | AAA | Lc -96.1 | Preferred for body text |
| Black text on #3E4271 | 2.22:1 | Fails | Lc 12.2 | Not readable |
| #3E4271 text on white | 9.44:1 | AAA | Lc 91.8 | Preferred for body text |
| #3E4271 text on black | 2.22:1 | 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
#F4F5FB
oklch(97.1% 0.008 278.6)
-
Step 100
100
#E7E9F6
oklch(93.6% 0.018 279.1)
-
Step 200
200
#D4D7EF
oklch(88.4% 0.033 280)
-
Step 300
300
#B7BDE7
oklch(80.8% 0.06 278.6)
-
Step 400
400
#939BDB
oklch(70.8% 0.094 278.2)
-
Step 500
500
#7981D1
oklch(63.1% 0.12 278)
-
Step 600
600
#6369BE
oklch(55.6% 0.13 278.2)
-
Step 700
700
#5257A4
oklch(49.1% 0.122 278.1)
-
Step 800
800
#434785
oklch(42.6% 0.102 278.4)
-
Step 900
900 (this color)
#3E4271
oklch(39.8% 0.079 278.5)
-
Step 950
950
#21243E
oklch(27.1% 0.048 277.6)
#3E4271 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) | #314873 | 0.023 |
| Deuteranopia (no green cones) | #2E4470 | 0.023 |
| Tritanopia (no blue cones) | #2D4B54 | 0.068 |
| Achromatopsia (no color) | #464646 | 0.079 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3E4271
#3E4271
oklch(39.8% 0.079 278.5)
- #524706
#524706
oklch(39.7% 0.079 98.6)
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 #3E4271, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.050
- Dark Grey Blue #29465B ΔE 0.052
- Twilight Blue #0A437A ΔE 0.054
- Light Navy #155084 ΔE 0.057
- Cobalt #1E488F ΔE 0.059
- Dusk #4E5481 ΔE 0.062
- Dusk Blue #26538D ΔE 0.063
- Twilight #4E518B ΔE 0.063
Use #3E4271 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.