#3B417F
Closest named color: Dark Slate Blue (#483D8B). oklch(40.3% 0.103 276.6), rgb(59, 65, 127).
Aa
White text reads best on this color (9.33:1).
About this color
#3B417F is a dark, moderately saturated blue. In OKLCH its lightness is 40%, its chroma 0.103 and its hue 277°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.031 away. White text reads best on it, at 9.33:1.
| Hue family | Blues |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.103) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.24:1 |
| White text | 9.33:1 |
Values
| HEX | #3B417F |
| RGB | rgb(59, 65, 127) |
| HSL | hsl(235, 37%, 36%) |
| OKLCH | oklch(40.3% 0.103 276.6) |
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 #3B417F | 9.33:1 | AAA | Lc -95.7 | Preferred for body text |
| Black text on #3B417F | 2.24:1 | Fails | Lc 12.6 | Not readable |
| #3B417F text on white | 9.33:1 | AAA | Lc 91.4 | Preferred for body text |
| #3B417F text on black | 2.24:1 | Fails | Lc -11.0 | 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
#E6E9F6
oklch(93.6% 0.018 275.6)
-
Step 200
200
#D3D8F0
oklch(88.6% 0.033 276.3)
-
Step 300
300
#B6BEE8
oklch(80.9% 0.06 276.5)
-
Step 400
400
#919BDD
oklch(70.7% 0.097 277)
-
Step 500
500
#7681D3
oklch(63% 0.124 276.5)
-
Step 600
600
#6069C0
oklch(55.5% 0.134 276.7)
-
Step 700
700
#5057A6
oklch(49.1% 0.125 276.9)
-
Step 800
800 (this color)
#3B417F
oklch(40.3% 0.103 276.6)
-
Step 900
900
#373D6C
oklch(37.8% 0.08 276.4)
-
Step 950
950
#20243F
oklch(27.1% 0.05 276.1)
#3B417F 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) | #254A81 | 0.034 |
| Deuteranopia (no green cones) | #1E447E | 0.035 |
| Tritanopia (no blue cones) | #1E4E5A | 0.089 |
| Achromatopsia (no color) | #474747 | 0.103 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3B417F
#3B417F
oklch(40.3% 0.103 276.6)
- #564800
#564800
oklch(40.4% 0.083 96.3)
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 #3B417F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.031
- Cobalt #1E488F ΔE 0.042
- Blueberry #464196 ΔE 0.042
- Twilight Blue #0A437A ΔE 0.049
- Light Navy #155084 ΔE 0.052
- Dusk Blue #26538D ΔE 0.054
- Twilight #4E518B ΔE 0.058
- Dusk #4E5481 ΔE 0.065
Use #3B417F 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.