#3B4A87
Closest named color: Dusk Blue (#26538D). oklch(42.8% 0.103 271.1), rgb(59, 74, 135).
Aa
White text reads best on this color (8.34:1).
About this color
#3B4A87 is a dark, moderately saturated blue. In OKLCH its lightness is 43%, its chroma 0.103 and its hue 271°. Its hue sits on the cool side of the wheel. The nearest named color is Dusk Blue (#26538D), ΔE 0.031 away. White text reads best on it, at 8.34:1.
| Hue family | Blues |
| Lightness | dark (43%) |
| Chroma | moderately saturated (0.103) |
| Temperature | cool |
| Nearest name | Dusk Blue (#26538D) |
| Black text | 2.51:1 |
| White text | 8.34:1 |
Values
| HEX | #3B4A87 |
| RGB | rgb(59, 74, 135) |
| HSL | hsl(228, 39%, 38%) |
| OKLCH | oklch(42.8% 0.103 271.1) |
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 #3B4A87 | 8.34:1 | AAA | Lc -93.2 | Preferred for body text |
| Black text on #3B4A87 | 2.51:1 | Fails | Lc 15.3 | Dividers and decoration only |
| #3B4A87 text on white | 8.34:1 | AAA | Lc 88.6 | Fine for body text |
| #3B4A87 text on black | 2.51:1 | Fails | Lc -13.5 | 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
#F3F5FB
oklch(97% 0.008 271.3)
-
Step 100
100
#E5EAF6
oklch(93.7% 0.017 267.8)
-
Step 200
200
#D1D8F0
oklch(88.4% 0.034 272.8)
-
Step 300
300
#B2BFE8
oklch(80.8% 0.06 271.2)
-
Step 400
400
#8A9DDD
oklch(70.6% 0.097 271.1)
-
Step 500
500
#6E84D3
oklch(63.1% 0.122 270.8)
-
Step 600
600
#576CC1
oklch(55.6% 0.134 271)
-
Step 700
700
#485AA6
oklch(49.1% 0.123 271.2)
-
Step 800
800 (this color)
#3B4A87
oklch(42.8% 0.103 271.1)
-
Step 900
900
#323E6C
oklch(37.7% 0.08 271.1)
-
Step 950
950
#1D253F
oklch(27.1% 0.05 269.9)
#3B4A87 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) | #305189 | 0.022 |
| Deuteranopia (no green cones) | #264B86 | 0.024 |
| Tritanopia (no blue cones) | #135762 | 0.090 |
| Achromatopsia (no color) | #4E4E4E | 0.103 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3B4A87
#3B4A87
oklch(42.8% 0.103 271.1)
- #614D00
#614D00
oklch(42.9% 0.088 91.6)
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 #3B4A87, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusk Blue #26538D ΔE 0.031
- Cobalt #1E488F ΔE 0.035
- Twilight #4E518B ΔE 0.036
- Light Navy #155084 ΔE 0.039
- Blueberry #464196 ΔE 0.039
- Dark Slate Blue #483D8B ΔE 0.039
- Dusk #4E5481 ΔE 0.045
- Light Navy Blue #2E5A88 ΔE 0.047
Use #3B4A87 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.