#3E4174
Closest named color: Dark Slate Blue (#483D8B). oklch(39.8% 0.085 279.2), rgb(62, 65, 116).
Aa
White text reads best on this color (9.48:1).
About this color
#3E4174 is a dark, moderately saturated blue. In OKLCH its lightness is 40%, its chroma 0.085 and its hue 279°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.045 away. White text reads best on it, at 9.48:1.
| Hue family | Blues |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.085) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.21:1 |
| White text | 9.48:1 |
Values
| HEX | #3E4174 |
| RGB | rgb(62, 65, 116) |
| HSL | hsl(237, 30%, 35%) |
| OKLCH | oklch(39.8% 0.085 279.2) |
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 #3E4174 | 9.48:1 | AAA | Lc -96.1 | Preferred for body text |
| Black text on #3E4174 | 2.21:1 | Fails | Lc 12.1 | Not readable |
| #3E4174 text on white | 9.48:1 | AAA | Lc 91.9 | Preferred for body text |
| #3E4174 text on black | 2.21:1 | Fails | Lc -10.5 | 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
#D4D7F1
oklch(88.5% 0.036 280.4)
-
Step 300
300
#B7BDEA
oklch(80.9% 0.064 278.9)
-
Step 400
400
#939AE0
oklch(70.8% 0.102 279)
-
Step 500
500
#7A7FD7
oklch(63.1% 0.131 279.5)
-
Step 600
600
#6467C4
oklch(55.7% 0.142 279.3)
-
Step 700
700
#5355A9
oklch(49.1% 0.132 279.4)
-
Step 800
800
#444689
oklch(42.7% 0.109 279.4)
-
Step 900
900 (this color)
#3E4174
oklch(39.8% 0.085 279.2)
-
Step 950
950
#212340
oklch(27% 0.054 279.2)
#3E4174 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) | #2E4876 | 0.027 |
| Deuteranopia (no green cones) | #2A4473 | 0.028 |
| Tritanopia (no blue cones) | #2C4B55 | 0.073 |
| Achromatopsia (no color) | #464646 | 0.085 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3E4174
#3E4174
oklch(39.8% 0.085 279.2)
- #524700
#524700
oklch(39.7% 0.082 99.1)
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 #3E4174, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.045
- Twilight Blue #0A437A ΔE 0.053
- Cobalt #1E488F ΔE 0.056
- Light Navy #155084 ΔE 0.057
- Dark Grey Blue #29465B ΔE 0.058
- Blueberry #464196 ΔE 0.058
- Twilight #4E518B ΔE 0.062
- Dusk Blue #26538D ΔE 0.062
Use #3E4174 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.