#3E4780
Closest named color: Dark Slate Blue (#483D8B). oklch(41.9% 0.095 274.8), rgb(62, 71, 128).
Aa
White text reads best on this color (8.68:1).
About this color
#3E4780 is a dark, moderately saturated blue. In OKLCH its lightness is 42%, its chroma 0.095 and its hue 275°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.037 away. White text reads best on it, at 8.68:1.
| Hue family | Blues |
| Lightness | dark (42%) |
| Chroma | moderately saturated (0.095) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.41:1 |
| White text | 8.68:1 |
Values
| HEX | #3E4780 |
| RGB | rgb(62, 71, 128) |
| HSL | hsl(232, 35%, 37%) |
| OKLCH | oklch(41.9% 0.095 274.8) |
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 #3E4780 | 8.68:1 | AAA | Lc -94.2 | Preferred for body text |
| Black text on #3E4780 | 2.41:1 | Fails | Lc 14.3 | Not readable |
| #3E4780 text on white | 8.68:1 | AAA | Lc 89.7 | Fine for body text |
| #3E4780 text on black | 2.41:1 | Fails | Lc -12.6 | 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 800.
-
Step 50
50
#F4F5FB
oklch(97.1% 0.008 278.6)
-
Step 100
100
#E6E9F5
oklch(93.5% 0.016 274.8)
-
Step 200
200
#D3D8EE
oklch(88.5% 0.031 275.6)
-
Step 300
300
#B5BFE5
oklch(81% 0.055 273.5)
-
Step 400
400
#909CD8
oklch(70.6% 0.089 275.2)
-
Step 500
500
#7583CE
oklch(63.1% 0.114 274.6)
-
Step 600
600
#5F6BBB
oklch(55.5% 0.124 275.2)
-
Step 700
700
#4E59A1
oklch(49% 0.115 274.8)
-
Step 800
800 (this color)
#3E4780
oklch(41.9% 0.095 274.8)
-
Step 900
900
#363E69
oklch(37.8% 0.074 274.3)
-
Step 950
950
#20243D
oklch(26.9% 0.047 275.9)
#3E4780 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) | #304E82 | 0.025 |
| Deuteranopia (no green cones) | #2A497F | 0.025 |
| Tritanopia (no blue cones) | #23535D | 0.084 |
| Achromatopsia (no color) | #4B4B4B | 0.095 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3E4780
#3E4780
oklch(41.9% 0.095 274.8)
- #5C4B00
#5C4B00
oklch(41.8% 0.086 94)
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 #3E4780, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.037
- Twilight #4E518B ΔE 0.042
- Dusk Blue #26538D ΔE 0.042
- Cobalt #1E488F ΔE 0.042
- Blueberry #464196 ΔE 0.043
- Light Navy #155084 ΔE 0.044
- Dusk #4E5481 ΔE 0.047
- Light Navy Blue #2E5A88 ΔE 0.055
Use #3E4780 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.