#343E83
Closest named color: Dark Slate Blue (#483D8B). oklch(39.4% 0.115 273.7), rgb(52, 62, 131).
Aa
White text reads best on this color (9.70:1).
About this color
#343E83 is a dark, moderately saturated blue. In OKLCH its lightness is 39%, its chroma 0.115 and its hue 274°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.034 away. White text reads best on it, at 9.70:1.
| Hue family | Blues |
| Lightness | dark (39%) |
| Chroma | moderately saturated (0.115) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.16:1 |
| White text | 9.70:1 |
Values
| HEX | #343E83 |
| RGB | rgb(52, 62, 131) |
| HSL | hsl(232, 43%, 36%) |
| OKLCH | oklch(39.4% 0.115 273.7) |
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 #343E83 | 9.70:1 | AAA | Lc -96.5 | Preferred for body text |
| Black text on #343E83 | 2.16:1 | Fails | Lc 11.7 | Not readable |
| #343E83 text on white | 9.70:1 | AAA | Lc 92.3 | Preferred for body text |
| #343E83 text on black | 2.16:1 | Fails | Lc -10.2 | 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 900.
-
Step 50
50
#F3F5FE
oklch(97.1% 0.012 276.1)
-
Step 100
100
#E4E9FB
oklch(93.6% 0.025 273.5)
-
Step 200
200
#CFD8FA
oklch(88.6% 0.048 273.7)
-
Step 300
300
#AFBDF9
oklch(80.9% 0.086 274.1)
-
Step 400
400
#8699F6
oklch(70.8% 0.138 273.6)
-
Step 500
500
#6A7CF3
oklch(63.1% 0.178 273.7)
-
Step 600
600
#5462E1
oklch(55.7% 0.192 273.7)
-
Step 700
700
#4550C4
oklch(49.2% 0.179 273.7)
-
Step 800
800
#38429E
oklch(42.6% 0.148 273.6)
-
Step 900
900 (this color)
#343E83
oklch(39.4% 0.115 273.7)
-
Step 950
950
#1C224A
oklch(27% 0.074 274)
#343E83 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) | #194885 | 0.036 |
| Deuteranopia (no green cones) | #084182 | 0.039 |
| Tritanopia (no blue cones) | #004E5A | 0.102 |
| Achromatopsia (no color) | #444444 | 0.116 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #343E83
#343E83
oklch(39.4% 0.115 273.7)
- #554500
#554500
oklch(39.6% 0.081 93.8)
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 #343E83, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.034
- Cobalt #1E488F ΔE 0.036
- Blueberry #464196 ΔE 0.043
- Twilight Blue #0A437A ΔE 0.043
- Light Navy #155084 ΔE 0.055
- Dusk Blue #26538D ΔE 0.059
- Deep Sea Blue #015482 ΔE 0.069
- Marine Blue #01386A ΔE 0.069
Use #343E83 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.