#343A60
Closest named color: Prussian Blue (#1D3557). oklch(36.2% 0.066 275.8), rgb(52, 58, 96).
Aa
White text reads best on this color (10.93:1).
About this color
#343A60 is a dark, muted blue. In OKLCH its lightness is 36%, its chroma 0.066 and its hue 276°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.040 away. White text reads best on it, at 10.93:1.
| Hue family | Blues |
| Lightness | dark (36%) |
| Chroma | muted (0.066) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.92:1 |
| White text | 10.93:1 |
Values
| HEX | #343A60 |
| RGB | rgb(52, 58, 96) |
| HSL | hsl(232, 30%, 29%) |
| OKLCH | oklch(36.2% 0.066 275.8) |
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 #343A60 | 10.93:1 | AAA | Lc -99.1 | Preferred for body text |
| Black text on #343A60 | 1.92:1 | Fails | Lc 8.6 | Not readable |
| #343A60 text on white | 10.93:1 | AAA | Lc 95.3 | Preferred for body text |
| #343A60 text on black | 1.92:1 | Fails | Lc -7.4 | 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
#F4F5FA
oklch(97.1% 0.007 277.2)
-
Step 100
100
#E7E9F4
oklch(93.6% 0.015 277.8)
-
Step 200
200
#D4D8EC
oklch(88.5% 0.028 276.8)
-
Step 300
300
#B7BFE1
oklch(81% 0.049 274.8)
-
Step 400
400
#939DD2
oklch(70.8% 0.078 275.9)
-
Step 500
500
#7884C7
oklch(63.1% 0.102 275.4)
-
Step 600
600
#626CB3
oklch(55.5% 0.111 276.1)
-
Step 700
700
#515A9A
oklch(49% 0.103 275.9)
-
Step 800
800
#424A7D
oklch(42.7% 0.085 275.5)
-
Step 900
900 (this color)
#343A60
oklch(36.2% 0.066 275.8)
-
Step 950
950
#21253B
oklch(27.2% 0.041 275.4)
#343A60 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) | #2D3E62 | 0.014 |
| Deuteranopia (no green cones) | #293B5F | 0.016 |
| Tritanopia (no blue cones) | #264248 | 0.059 |
| Achromatopsia (no color) | #3D3D3D | 0.066 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #343A60
#343A60
oklch(36.2% 0.066 275.8)
- #483D0D
#483D0D
oklch(36.2% 0.066 95.7)
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 #343A60, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.040
- Dark Grey Blue #29465B ΔE 0.042
- Dark Blue Grey #1F3B4D ΔE 0.047
- Charcoal #264653 ΔE 0.052
- Marine Blue #01386A ΔE 0.053
- Onyx #343A40 ΔE 0.057
- Twilight Blue #0A437A ΔE 0.058
- Gunmetal #293241 ΔE 0.060
Use #343A60 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.