#3B4C8A
Closest named color: Dusk Blue (#26538D). oklch(43.4% 0.104 270.1), rgb(59, 76, 138).
Aa
White text reads best on this color (8.11:1).
About this color
#3B4C8A is a dark, moderately saturated blue. In OKLCH its lightness is 43%, its chroma 0.104 and its hue 270°. Its hue sits on the cool side of the wheel. The nearest named color is Dusk Blue (#26538D), ΔE 0.027 away. White text reads best on it, at 8.11:1.
| Hue family | Blues |
| Lightness | dark (43%) |
| Chroma | moderately saturated (0.104) |
| Temperature | cool |
| Nearest name | Dusk Blue (#26538D) |
| Black text | 2.58:1 |
| White text | 8.11:1 |
Values
| HEX | #3B4C8A |
| RGB | rgb(59, 76, 138) |
| HSL | hsl(227, 40%, 39%) |
| OKLCH | oklch(43.4% 0.104 270.1) |
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 #3B4C8A | 8.11:1 | AAA | Lc -92.6 | Preferred for body text |
| Black text on #3B4C8A | 2.58:1 | Fails | Lc 16.1 | Dividers and decoration only |
| #3B4C8A text on white | 8.11:1 | AAA | Lc 87.9 | Fine for body text |
| #3B4C8A text on black | 2.58:1 | Fails | Lc -14.2 | 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
#D0D9F0
oklch(88.6% 0.033 268.7)
-
Step 300
300
#B1BFE9
oklch(80.8% 0.061 270.5)
-
Step 400
400
#899EDE
oklch(70.8% 0.097 269.9)
-
Step 500
500
#6C84D5
oklch(63.1% 0.125 270)
-
Step 600
600
#556CC2
oklch(55.5% 0.136 270.2)
-
Step 700
700
#455AA8
oklch(49.1% 0.127 269.9)
-
Step 800
800 (this color)
#3B4C8A
oklch(43.4% 0.104 270.1)
-
Step 900
900
#313E6D
oklch(37.7% 0.082 270.4)
-
Step 950
950
#1D2540
oklch(27.1% 0.052 270.2)
#3B4C8A 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) | #31538C | 0.021 |
| Deuteranopia (no green cones) | #274C89 | 0.023 |
| Tritanopia (no blue cones) | #0D5A64 | 0.094 |
| Achromatopsia (no color) | #505050 | 0.104 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3B4C8A
#3B4C8A
oklch(43.4% 0.104 270.1)
- #644E00
#644E00
oklch(43.5% 0.089 90)
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 #3B4C8A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusk Blue #26538D ΔE 0.027
- Twilight #4E518B ΔE 0.032
- Cobalt #1E488F ΔE 0.036
- Light Navy #155084 ΔE 0.039
- Blueberry #464196 ΔE 0.039
- Dusk #4E5481 ΔE 0.042
- Light Navy Blue #2E5A88 ΔE 0.042
- Dark Slate Blue #483D8B ΔE 0.043
Use #3B4C8A 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.