#343E8E
Closest named color: Dark Slate Blue (#483D8B). oklch(40.3% 0.132 273.6), rgb(52, 62, 142).
Aa
White text reads best on this color (9.43:1).
About this color
#343E8E is a dark, moderately saturated blue. In OKLCH its lightness is 40%, its chroma 0.132 and its hue 274°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.031 away. White text reads best on it, at 9.43:1.
| Hue family | Blues |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.132) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.22:1 |
| White text | 9.43:1 |
Values
| HEX | #343E8E |
| RGB | rgb(52, 62, 142) |
| HSL | hsl(233, 46%, 38%) |
| OKLCH | oklch(40.3% 0.132 273.6) |
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 #343E8E | 9.43:1 | AAA | Lc -95.8 | Preferred for body text |
| Black text on #343E8E | 2.22:1 | Fails | Lc 12.5 | Not readable |
| #343E8E text on white | 9.43:1 | AAA | Lc 91.5 | Preferred for body text |
| #343E8E text on black | 2.22:1 | Fails | Lc -10.9 | 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
#F3F5FD
oklch(97.1% 0.011 274.9)
-
Step 100
100
#E5E9F9
oklch(93.6% 0.022 274.7)
-
Step 200
200
#D0D8F6
oklch(88.6% 0.042 273.7)
-
Step 300
300
#B0BEF3
oklch(80.9% 0.077 273.1)
-
Step 400
400
#889AED
oklch(70.6% 0.123 273.6)
-
Step 500
500
#6C7FE7
oklch(63.1% 0.157 273.3)
-
Step 600
600
#5666D5
oklch(55.7% 0.17 273.4)
-
Step 700
700
#4754B9
oklch(49.2% 0.158 273.6)
-
Step 800
800 (this color)
#343E8E
oklch(40.3% 0.132 273.6)
-
Step 900
900
#313B77
oklch(37.7% 0.102 273.4)
-
Step 950
950
#1D2346
oklch(27.1% 0.065 273.9)
#343E8E 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) | #024A91 | 0.045 |
| Deuteranopia (no green cones) | #00428C | 0.042 |
| Tritanopia (no blue cones) | #00515F | 0.113 |
| Achromatopsia (no color) | #464646 | 0.132 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #343E8E
#343E8E
oklch(40.3% 0.132 273.6)
- #574700
#574700
oklch(40.3% 0.083 94.2)
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 #343E8E, 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
- Blueberry #464196 ΔE 0.032
- Cobalt #1E488F ΔE 0.032
- Twilight Blue #0A437A ΔE 0.054
- Sapphire #2138AB ΔE 0.055
- Dusk Blue #26538D ΔE 0.058
- Light Navy #155084 ΔE 0.059
- Twilight #4E518B ΔE 0.070
Use #343E8E 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.