#343C76
Closest named color: Twilight Blue (#0A437A). oklch(38.1% 0.098 274.8), rgb(52, 60, 118).
Aa
White text reads best on this color (10.22:1).
About this color
#343C76 is a dark, moderately saturated blue. In OKLCH its lightness is 38%, its chroma 0.098 and its hue 275°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.041 away. White text reads best on it, at 10.22:1.
| Hue family | Blues |
| Lightness | dark (38%) |
| Chroma | moderately saturated (0.098) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 2.05:1 |
| White text | 10.22:1 |
Values
| HEX | #343C76 |
| RGB | rgb(52, 60, 118) |
| HSL | hsl(233, 39%, 33%) |
| OKLCH | oklch(38.1% 0.098 274.8) |
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 #343C76 | 10.22:1 | AAA | Lc -97.6 | Preferred for body text |
| Black text on #343C76 | 2.05:1 | Fails | Lc 10.4 | Not readable |
| #343C76 text on white | 10.22:1 | AAA | Lc 93.6 | Preferred for body text |
| #343C76 text on black | 2.05:1 | Fails | Lc -9.0 | 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 900.
-
Step 50
50
#F3F5FC
oklch(97.1% 0.01 273.4)
-
Step 100
100
#E5E9F9
oklch(93.6% 0.022 274.7)
-
Step 200
200
#D1D8F5
oklch(88.6% 0.041 274.8)
-
Step 300
300
#B2BEF1
oklch(81% 0.073 274.3)
-
Step 400
400
#8B9AEA
oklch(70.7% 0.118 274.9)
-
Step 500
500
#707FE3
oklch(63.1% 0.15 274.8)
-
Step 600
600
#5A66D1
oklch(55.6% 0.163 275)
-
Step 700
700
#4A54B5
oklch(49.1% 0.152 274.9)
-
Step 800
800
#3C4593
oklch(42.6% 0.127 274.7)
-
Step 900
900 (this color)
#343C76
oklch(38.1% 0.098 274.8)
-
Step 950
950
#1E2344
oklch(27% 0.061 275)
#343C76 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) | #224478 | 0.029 |
| Deuteranopia (no green cones) | #1A3E75 | 0.031 |
| Tritanopia (no blue cones) | #154953 | 0.087 |
| Achromatopsia (no color) | #414141 | 0.099 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #343C76
#343C76
oklch(38.1% 0.098 274.8)
- #504100
#504100
oklch(38% 0.078 94.1)
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 #343C76, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.041
- Dark Slate Blue #483D8B ΔE 0.048
- Cobalt #1E488F ΔE 0.052
- Marine Blue #01386A ΔE 0.057
- Light Navy #155084 ΔE 0.061
- Blueberry #464196 ΔE 0.062
- Dark Grey Blue #29465B ΔE 0.063
- Prussian Blue #1D3557 ΔE 0.066
Use #343C76 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.