#343D67
Closest named color: Dark Grey Blue (#29465B). oklch(37.3% 0.073 273.2), rgb(52, 61, 103).
Aa
White text reads best on this color (10.45:1).
About this color
#343D67 is a dark, moderately saturated blue. In OKLCH its lightness is 37%, its chroma 0.073 and its hue 273°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.041 away. White text reads best on it, at 10.45:1.
| Hue family | Blues |
| Lightness | dark (37%) |
| Chroma | moderately saturated (0.073) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.00:1 |
| White text | 10.45:1 |
Values
| HEX | #343D67 |
| RGB | rgb(52, 61, 103) |
| HSL | hsl(229, 33%, 30%) |
| OKLCH | oklch(37.3% 0.073 273.2) |
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 #343D67 | 10.45:1 | AAA | Lc -98.2 | Preferred for body text |
| Black text on #343D67 | 2.00:1 | Fails | Lc 9.8 | Not readable |
| #343D67 text on white | 10.45:1 | AAA | Lc 94.2 | Preferred for body text |
| #343D67 text on black | 2.00:1 | Fails | Lc -8.4 | 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
#F4F5FB
oklch(97.1% 0.008 278.6)
-
Step 100
100
#E6E9F5
oklch(93.5% 0.016 274.8)
-
Step 200
200
#D2D8EE
oklch(88.4% 0.031 273.6)
-
Step 300
300
#B5BFE5
oklch(81% 0.055 273.5)
-
Step 400
400
#8E9DD8
oklch(70.7% 0.088 273)
-
Step 500
500
#7384CD
oklch(63.1% 0.112 272.9)
-
Step 600
600
#5D6CBA
oklch(55.6% 0.122 273.6)
-
Step 700
700
#4C5AA0
oklch(49% 0.113 273)
-
Step 800
800
#3F4A82
oklch(42.8% 0.094 273.4)
-
Step 900
900 (this color)
#343D67
oklch(37.3% 0.073 273.2)
-
Step 950
950
#1F253D
oklch(27.1% 0.046 272.4)
#343D67 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) | #2D4269 | 0.016 |
| Deuteranopia (no green cones) | #293E66 | 0.015 |
| Tritanopia (no blue cones) | #21464D | 0.065 |
| Achromatopsia (no color) | #3F3F3F | 0.073 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #343D67
#343D67
oklch(37.3% 0.073 273.2)
- #4E3F05
#4E3F05
oklch(37.3% 0.073 92.8)
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 #343D67, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.041
- Twilight Blue #0A437A ΔE 0.048
- Prussian Blue #1D3557 ΔE 0.050
- Charcoal #264653 ΔE 0.054
- Marine Blue #01386A ΔE 0.054
- Dark Blue Grey #1F3B4D ΔE 0.056
- Onyx #343A40 ΔE 0.067
- Light Navy #155084 ΔE 0.069
Use #343D67 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.