#343E84
Closest named color: Dark Slate Blue (#483D8B). oklch(39.5% 0.117 273.7), rgb(52, 62, 132).
Aa
White text reads best on this color (9.68:1).
About this color
#343E84 is a dark, moderately saturated blue. In OKLCH its lightness is 40%, its chroma 0.117 and its hue 274°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.033 away. White text reads best on it, at 9.68:1.
| Hue family | Blues |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.117) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.16:1 |
| White text | 9.68:1 |
Values
| HEX | #343E84 |
| RGB | rgb(52, 62, 132) |
| HSL | hsl(233, 43%, 36%) |
| OKLCH | oklch(39.5% 0.117 273.7) |
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 #343E84 | 9.68:1 | AAA | Lc -96.4 | Preferred for body text |
| Black text on #343E84 | 2.16:1 | Fails | Lc 11.8 | Not readable |
| #343E84 text on white | 9.68:1 | AAA | Lc 92.2 | Preferred for body text |
| #343E84 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
#CED8FA
oklch(88.5% 0.048 272.4)
-
Step 300
300
#AEBDFA
oklch(80.9% 0.088 273.6)
-
Step 400
400
#8598F7
oklch(70.6% 0.141 273.7)
-
Step 500
500
#6A7CF4
oklch(63.2% 0.179 273.7)
-
Step 600
600
#5461E3
oklch(55.6% 0.195 273.9)
-
Step 700
700
#454FC5
oklch(49.1% 0.182 273.9)
-
Step 800
800
#38429F
oklch(42.7% 0.15 273.6)
-
Step 900
900 (this color)
#343E84
oklch(39.5% 0.117 273.7)
-
Step 950
950
#1C224A
oklch(27% 0.074 274)
#343E84 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) | #174886 | 0.037 |
| Deuteranopia (no green cones) | #054183 | 0.041 |
| Tritanopia (no blue cones) | #004E5B | 0.102 |
| Achromatopsia (no color) | #444444 | 0.117 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #343E84
#343E84
oklch(39.5% 0.117 273.7)
- #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 #343E84, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.033
- Cobalt #1E488F ΔE 0.036
- Blueberry #464196 ΔE 0.042
- Twilight Blue #0A437A ΔE 0.044
- Light Navy #155084 ΔE 0.055
- Dusk Blue #26538D ΔE 0.059
- Deep Sea Blue #015482 ΔE 0.069
- Twilight #4E518B ΔE 0.070
Use #343E84 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.