#343E7D
Closest named color: Dark Slate Blue (#483D8B). oklch(39% 0.106 273.7), rgb(52, 62, 125).
Aa
White text reads best on this color (9.85:1).
About this color
#343E7D is a dark, moderately saturated blue. In OKLCH its lightness is 39%, its chroma 0.106 and its hue 274°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.039 away. White text reads best on it, at 9.85:1.
| Hue family | Blues |
| Lightness | dark (39%) |
| Chroma | moderately saturated (0.106) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.13:1 |
| White text | 9.85:1 |
Values
| HEX | #343E7D |
| RGB | rgb(52, 62, 125) |
| HSL | hsl(232, 41%, 35%) |
| OKLCH | oklch(39% 0.106 273.7) |
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 #343E7D | 9.85:1 | AAA | Lc -96.8 | Preferred for body text |
| Black text on #343E7D | 2.13:1 | Fails | Lc 11.3 | Not readable |
| #343E7D text on white | 9.85:1 | AAA | Lc 92.7 | Preferred for body text |
| #343E7D text on black | 2.13:1 | Fails | Lc -9.8 | 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
#F3F5FD
oklch(97.1% 0.011 274.9)
-
Step 100
100
#E5E9FA
oklch(93.6% 0.023 275.4)
-
Step 200
200
#CFD8F7
oklch(88.5% 0.044 272.7)
-
Step 300
300
#B0BEF5
oklch(81% 0.079 273.4)
-
Step 400
400
#889AF0
oklch(70.8% 0.127 273.7)
-
Step 500
500
#6C7EEB
oklch(63.1% 0.164 273.7)
-
Step 600
600
#5564D9
oklch(55.5% 0.178 273.6)
-
Step 700
700
#4653BC
oklch(49.2% 0.164 273.4)
-
Step 800
800
#394498
oklch(42.6% 0.137 273.5)
-
Step 900
900 (this color)
#343E7D
oklch(39% 0.106 273.7)
-
Step 950
950
#1C2347
oklch(27.1% 0.067 272.9)
#343E7D 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) | #1F477F | 0.032 |
| Deuteranopia (no green cones) | #15407C | 0.033 |
| Tritanopia (no blue cones) | #094C57 | 0.095 |
| Achromatopsia (no color) | #434343 | 0.107 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #343E7D
#343E7D
oklch(39% 0.106 273.7)
- #534300
#534300
oklch(38.8% 0.08 93.4)
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 #343E7D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.039
- Twilight Blue #0A437A ΔE 0.040
- Cobalt #1E488F ΔE 0.042
- Blueberry #464196 ΔE 0.051
- Light Navy #155084 ΔE 0.055
- Dusk Blue #26538D ΔE 0.061
- Marine Blue #01386A ΔE 0.064
- Deep Sea Blue #015482 ΔE 0.068
Use #343E7D 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.