#343D9B
Closest named color: Blueberry (#464196). oklch(41.2% 0.152 273.5), rgb(52, 61, 155).
Aa
White text reads best on this color (9.18:1).
About this color
#343D9B is a dark, vivid blue. In OKLCH its lightness is 41%, its chroma 0.152 and its hue 274°. Its hue sits on the cool side of the wheel. The nearest named color is Blueberry (#464196), ΔE 0.031 away. White text reads best on it, at 9.18:1.
| Hue family | Blues |
| Lightness | dark (41%) |
| Chroma | vivid (0.152) |
| Temperature | cool |
| Nearest name | Blueberry (#464196) |
| Black text | 2.28:1 |
| White text | 9.18:1 |
Values
| HEX | #343D9B |
| RGB | rgb(52, 61, 155) |
| HSL | hsl(235, 50%, 41%) |
| OKLCH | oklch(41.2% 0.152 273.5) |
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 #343D9B | 9.18:1 | AAA | Lc -95.1 | Preferred for body text |
| Black text on #343D9B | 2.28:1 | Fails | Lc 13.2 | Not readable |
| #343D9B text on white | 9.18:1 | AAA | Lc 90.7 | Preferred for body text |
| #343D9B text on black | 2.28:1 | Fails | Lc -11.6 | 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
#F3F5FE
oklch(97.1% 0.012 276.1)
-
Step 100
100
#E4E9FC
oklch(93.6% 0.026 274.1)
-
Step 200
200
#CED8FB
oklch(88.6% 0.049 272.8)
-
Step 300
300
#AEBDFA
oklch(80.9% 0.088 273.6)
-
Step 400
400
#8598F8
oklch(70.6% 0.142 273.8)
-
Step 500
500
#697BF5
oklch(63% 0.182 273.7)
-
Step 600
600
#5361E4
oklch(55.6% 0.197 273.5)
-
Step 700
700
#444FC6
oklch(49.1% 0.183 273.5)
-
Step 800
800 (this color)
#343D9B
oklch(41.2% 0.152 273.5)
-
Step 900
900
#2F397F
oklch(37.7% 0.118 273.3)
-
Step 950
950
#1B224A
oklch(27% 0.074 273)
#343D9B 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) | #004C9E | 0.048 |
| Deuteranopia (no green cones) | #004399 | 0.041 |
| Tritanopia (no blue cones) | #005466 | 0.124 |
| Achromatopsia (no color) | #484848 | 0.152 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #343D9B
#343D9B
oklch(41.2% 0.152 273.5)
- #5A4900
#5A4900
oklch(41.1% 0.084 93.6)
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 #343D9B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blueberry #464196 ΔE 0.031
- Sapphire #2138AB ΔE 0.037
- Dark Slate Blue #483D8B ΔE 0.040
- Cobalt #1E488F ΔE 0.041
- Dusk Blue #26538D ΔE 0.066
- Twilight Blue #0A437A ΔE 0.070
- Indigo Blue #3A18B1 ΔE 0.070
- Light Navy #155084 ΔE 0.071
Use #343D9B 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.