#343E64
Closest named color: Dark Grey Blue (#29465B). oklch(37.3% 0.067 271.7), rgb(52, 62, 100).
Aa
White text reads best on this color (10.40:1).
About this color
#343E64 is a dark, muted blue. In OKLCH its lightness is 37%, its chroma 0.067 and its hue 272°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.035 away. White text reads best on it, at 10.40:1.
| Hue family | Blues |
| Lightness | dark (37%) |
| Chroma | muted (0.067) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.01:1 |
| White text | 10.40:1 |
Values
| HEX | #343E64 |
| RGB | rgb(52, 62, 100) |
| HSL | hsl(228, 32%, 30%) |
| OKLCH | oklch(37.3% 0.067 271.7) |
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 #343E64 | 10.40:1 | AAA | Lc -98.1 | Preferred for body text |
| Black text on #343E64 | 2.01:1 | Fails | Lc 9.8 | Not readable |
| #343E64 text on white | 10.40:1 | AAA | Lc 94.1 | Preferred for body text |
| #343E64 text on black | 2.01:1 | Fails | Lc -8.5 | 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
#E6EAF4
oklch(93.7% 0.014 268.5)
-
Step 200
200
#D2D9EC
oklch(88.6% 0.027 269.6)
-
Step 300
300
#B5BFE2
oklch(80.8% 0.051 272.7)
-
Step 400
400
#8F9ED3
oklch(70.7% 0.08 272)
-
Step 500
500
#7385C8
oklch(63% 0.103 271.7)
-
Step 600
600
#5C6EB4
oklch(55.6% 0.111 271.5)
-
Step 700
700
#4C5C9B
oklch(49.2% 0.103 271.4)
-
Step 800
800
#3E4B7E
oklch(42.7% 0.086 271.5)
-
Step 900
900 (this color)
#343E64
oklch(37.3% 0.067 271.7)
-
Step 950
950
#1F253B
oklch(27% 0.042 271.7)
#343E64 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) | #304266 | 0.012 |
| Deuteranopia (no green cones) | #2C3E63 | 0.011 |
| Tritanopia (no blue cones) | #23464C | 0.060 |
| Achromatopsia (no color) | #404040 | 0.067 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #343E64
#343E64
oklch(37.3% 0.067 271.7)
- #4D3F0F
#4D3F0F
oklch(37.3% 0.067 92.2)
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 #343E64, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.035
- Charcoal #264653 ΔE 0.048
- Prussian Blue #1D3557 ΔE 0.049
- Twilight Blue #0A437A ΔE 0.051
- Dark Blue Grey #1F3B4D ΔE 0.051
- Marine Blue #01386A ΔE 0.056
- Onyx #343A40 ΔE 0.062
- Charcoal Grey #3C4142 ΔE 0.064
Use #343E64 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.