#334666
Closest named color: Dark Grey Blue (#29465B). oklch(39.3% 0.06 260.5), rgb(51, 70, 102).
Aa
White text reads best on this color (9.50:1).
About this color
#334666 is a dark, muted blue. In OKLCH its lightness is 39%, its chroma 0.060 and its hue 260°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.024 away. White text reads best on it, at 9.50:1.
| Hue family | Blues |
| Lightness | dark (39%) |
| Chroma | muted (0.060) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.20:1 |
| White text | 9.50:1 |
Values
| HEX | #334666 |
| RGB | rgb(51, 70, 102) |
| HSL | hsl(218, 33%, 30%) |
| OKLCH | oklch(39.3% 0.06 260.5) |
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 #334666 | 9.50:1 | AAA | Lc -96.2 | Preferred for body text |
| Black text on #334666 | 2.20:1 | Fails | Lc 12.0 | Not readable |
| #334666 text on white | 9.50:1 | AAA | Lc 91.9 | Preferred for body text |
| #334666 text on black | 2.20:1 | Fails | Lc -10.5 | 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
#F3F6FA
oklch(97.2% 0.006 255.5)
-
Step 100
100
#E5EAF3
oklch(93.6% 0.013 262.4)
-
Step 200
200
#D0DAEA
oklch(88.6% 0.025 259.8)
-
Step 300
300
#B0C2DE
oklch(80.9% 0.044 259.2)
-
Step 400
400
#87A2CE
oklch(70.8% 0.072 260.1)
-
Step 500
500
#698AC1
oklch(63.1% 0.091 260.3)
-
Step 600
600
#5173AE
oklch(55.6% 0.1 260.9)
-
Step 700
700
#416095
oklch(49% 0.093 260.6)
-
Step 800
800
#364F79
oklch(42.8% 0.077 260.3)
-
Step 900
900 (this color)
#334666
oklch(39.3% 0.06 260.5)
-
Step 950
950
#1C2739
oklch(27.1% 0.037 260)
#334666 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) | #3A4867 | 0.012 |
| Deuteranopia (no green cones) | #344365 | 0.009 |
| Tritanopia (no blue cones) | #1E4D51 | 0.054 |
| Achromatopsia (no color) | #464646 | 0.060 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #334666
#334666
oklch(39.3% 0.06 260.5)
- #56421D
#56421D
oklch(39.2% 0.06 80.9)
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 #334666, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.024
- Charcoal #264653 ΔE 0.038
- Twilight Blue #0A437A ΔE 0.051
- Light Navy #155084 ΔE 0.056
- Dark Slate Gray #2F4F4F ΔE 0.056
- Dark Blue Grey #1F3B4D ΔE 0.059
- Charcoal Grey #3C4142 ΔE 0.060
- Deep Sea Blue #015482 ΔE 0.060
Use #334666 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.