#343B60
Closest named color: Dark Grey Blue (#29465B). oklch(36.4% 0.065 274.6), rgb(52, 59, 96).
Aa
White text reads best on this color (10.82:1).
About this color
#343B60 is a dark, muted blue. In OKLCH its lightness is 36%, its chroma 0.065 and its hue 275°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.040 away. White text reads best on it, at 10.82:1.
| Hue family | Blues |
| Lightness | dark (36%) |
| Chroma | muted (0.065) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 1.94:1 |
| White text | 10.82:1 |
Values
| HEX | #343B60 |
| RGB | rgb(52, 59, 96) |
| HSL | hsl(230, 30%, 29%) |
| OKLCH | oklch(36.4% 0.065 274.6) |
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 #343B60 | 10.82:1 | AAA | Lc -98.9 | Preferred for body text |
| Black text on #343B60 | 1.94:1 | Fails | Lc 8.9 | Not readable |
| #343B60 text on white | 10.82:1 | AAA | Lc 95.0 | Preferred for body text |
| #343B60 text on black | 1.94:1 | Fails | Lc -7.6 | 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 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
#D3D8EB
oklch(88.4% 0.027 274.1)
-
Step 300
300
#B7BFE1
oklch(81% 0.049 274.8)
-
Step 400
400
#929DD1
oklch(70.6% 0.077 275)
-
Step 500
500
#7784C5
oklch(63% 0.099 274.6)
-
Step 600
600
#616DB2
oklch(55.6% 0.108 274.9)
-
Step 700
700
#505B99
oklch(49.1% 0.1 274.5)
-
Step 800
800
#424B7C
oklch(42.8% 0.082 274.5)
-
Step 900
900 (this color)
#343B60
oklch(36.4% 0.065 274.6)
-
Step 950
950
#20253A
oklch(27% 0.04 273.2)
#343B60 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) | #2E3F61 | 0.014 |
| Deuteranopia (no green cones) | #2A3C5F | 0.015 |
| Tritanopia (no blue cones) | #254249 | 0.056 |
| Achromatopsia (no color) | #3D3D3D | 0.065 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #343B60
#343B60
oklch(36.4% 0.065 274.6)
- #493D0F
#493D0F
oklch(36.3% 0.064 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 #343B60, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.040
- Prussian Blue #1D3557 ΔE 0.041
- Dark Blue Grey #1F3B4D ΔE 0.046
- Charcoal #264653 ΔE 0.050
- Marine Blue #01386A ΔE 0.054
- Onyx #343A40 ΔE 0.056
- Twilight Blue #0A437A ΔE 0.057
- Gunmetal #293241 ΔE 0.061
Use #343B60 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.