#304D65
Closest named color: Dark Grey Blue (#29465B). oklch(40.8% 0.053 244.6), rgb(48, 77, 101).
Aa
White text reads best on this color (8.84:1).
About this color
#304D65 is a dark, muted blue. In OKLCH its lightness is 41%, its chroma 0.053 and its hue 245°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.028 away. White text reads best on it, at 8.84:1.
| Hue family | Blues |
| Lightness | dark (41%) |
| Chroma | muted (0.053) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.37:1 |
| White text | 8.84:1 |
Values
| HEX | #304D65 |
| RGB | rgb(48, 77, 101) |
| HSL | hsl(207, 36%, 29%) |
| OKLCH | oklch(40.8% 0.053 244.6) |
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 #304D65 | 8.84:1 | AAA | Lc -94.6 | Preferred for body text |
| Black text on #304D65 | 2.37:1 | Fails | Lc 13.8 | Not readable |
| #304D65 text on white | 8.84:1 | AAA | Lc 90.1 | Preferred for body text |
| #304D65 text on black | 2.37:1 | Fails | Lc -12.1 | 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 800.
-
Step 50
50
#F3F6F8
oklch(97.1% 0.004 236.5)
-
Step 100
100
#E5EBF0
oklch(93.7% 0.009 242.8)
-
Step 200
200
#D0DBE4
oklch(88.6% 0.017 242.5)
-
Step 300
300
#B0C3D4
oklch(80.8% 0.032 245.2)
-
Step 400
400
#87A5BE
oklch(70.8% 0.05 243.7)
-
Step 500
500
#688EAE
oklch(63.1% 0.064 244.5)
-
Step 600
600
#4F7899
oklch(55.6% 0.069 243.7)
-
Step 700
700
#406583
oklch(49.2% 0.064 244.1)
-
Step 800
800 (this color)
#304D65
oklch(40.8% 0.053 244.6)
-
Step 900
900
#2E4456
oklch(37.6% 0.041 243.9)
-
Step 950
950
#1B2833
oklch(27% 0.027 244.6)
#304D65 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) | #434D66 | 0.026 |
| Deuteranopia (no green cones) | #3C4865 | 0.021 |
| Tritanopia (no blue cones) | #165355 | 0.045 |
| Achromatopsia (no color) | #4A4A4A | 0.053 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #304D65
#304D65
oklch(40.8% 0.053 244.6)
- #5E442A
#5E442A
oklch(40.9% 0.053 65.4)
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 #304D65, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.028
- Charcoal #264653 ΔE 0.038
- Dark Slate Gray #2F4F4F ΔE 0.041
- Deep Teal #00555A ΔE 0.047
- YInMn Blue #415A77 ΔE 0.052
- Deep Sea Blue #015482 ΔE 0.053
- Light Navy #155084 ΔE 0.054
- Dark Teal #014D4E ΔE 0.056
Use #304D65 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.