#3E4587
Closest named color: Dark Slate Blue (#483D8B). oklch(41.9% 0.109 276.1), rgb(62, 69, 135).
Aa
White text reads best on this color (8.72:1).
About this color
#3E4587 is a dark, moderately saturated blue. In OKLCH its lightness is 42%, its chroma 0.109 and its hue 276°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.026 away. White text reads best on it, at 8.72:1.
| Hue family | Blues |
| Lightness | dark (42%) |
| Chroma | moderately saturated (0.109) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.40:1 |
| White text | 8.72:1 |
Values
| HEX | #3E4587 |
| RGB | rgb(62, 69, 135) |
| HSL | hsl(234, 37%, 39%) |
| OKLCH | oklch(41.9% 0.109 276.1) |
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 #3E4587 | 8.72:1 | AAA | Lc -94.2 | Preferred for body text |
| Black text on #3E4587 | 2.40:1 | Fails | Lc 14.2 | Not readable |
| #3E4587 text on white | 8.72:1 | AAA | Lc 89.7 | Fine for body text |
| #3E4587 text on black | 2.40:1 | Fails | Lc -12.5 | 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 800.
-
Step 50
50
#F4F5FB
oklch(97.1% 0.008 278.6)
-
Step 100
100
#E6E9F7
oklch(93.6% 0.019 276.3)
-
Step 200
200
#D2D8F1
oklch(88.5% 0.035 274.9)
-
Step 300
300
#B5BEEA
oklch(80.9% 0.063 275.9)
-
Step 400
400
#8F9BE0
oklch(70.7% 0.102 275.9)
-
Step 500
500
#7581D7
oklch(63.2% 0.13 276)
-
Step 600
600
#5F69C4
oklch(55.7% 0.14 276.1)
-
Step 700
700
#4E57AA
oklch(49.2% 0.131 275.8)
-
Step 800
800 (this color)
#3E4587
oklch(41.9% 0.109 276.1)
-
Step 900
900
#363C6E
oklch(37.7% 0.085 276.3)
-
Step 950
950
#1F2440
oklch(27% 0.052 274.7)
#3E4587 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) | #274E89 | 0.034 |
| Deuteranopia (no green cones) | #1F4886 | 0.036 |
| Tritanopia (no blue cones) | #1D535F | 0.096 |
| Achromatopsia (no color) | #4B4B4B | 0.109 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3E4587
#3E4587
oklch(41.9% 0.109 276.1)
- #5B4C00
#5B4C00
oklch(41.9% 0.086 96)
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 #3E4587, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.026
- Blueberry #464196 ΔE 0.030
- Cobalt #1E488F ΔE 0.037
- Twilight #4E518B ΔE 0.044
- Dusk Blue #26538D ΔE 0.044
- Light Navy #155084 ΔE 0.049
- Dusk #4E5481 ΔE 0.054
- Twilight Blue #0A437A ΔE 0.058
Use #3E4587 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.