#304E69
Closest named color: Dark Grey Blue (#29465B). oklch(41.3% 0.058 246.9), rgb(48, 78, 105).
Aa
White text reads best on this color (8.67:1).
About this color
#304E69 is a dark, muted blue. In OKLCH its lightness is 41%, its chroma 0.058 and its hue 247°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.033 away. White text reads best on it, at 8.67:1.
| Hue family | Blues |
| Lightness | dark (41%) |
| Chroma | muted (0.058) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.41:1 |
| White text | 8.67:1 |
Values
| HEX | #304E69 |
| RGB | rgb(48, 78, 105) |
| HSL | hsl(208, 37%, 30%) |
| OKLCH | oklch(41.3% 0.058 246.9) |
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 #304E69 | 8.67:1 | AAA | Lc -94.2 | Preferred for body text |
| Black text on #304E69 | 2.41:1 | Fails | Lc 14.3 | Not readable |
| #304E69 text on white | 8.67:1 | AAA | Lc 89.7 | Fine for body text |
| #304E69 text on black | 2.41:1 | Fails | Lc -12.6 | 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 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
#D0DBE5
oklch(88.6% 0.018 245.4)
-
Step 300
300
#B0C3D6
oklch(80.9% 0.034 248.2)
-
Step 400
400
#86A4C1
oklch(70.6% 0.054 247.7)
-
Step 500
500
#678EB1
oklch(63.1% 0.068 246.2)
-
Step 600
600
#4E779D
oklch(55.5% 0.075 247.5)
-
Step 700
700
#3E6486
oklch(49% 0.07 246.8)
-
Step 800
800 (this color)
#304E69
oklch(41.3% 0.058 246.9)
-
Step 900
900
#2D4458
oklch(37.7% 0.045 245.6)
-
Step 950
950
#1B2834
oklch(27.1% 0.029 246.9)
#304E69 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) | #434F6A | 0.026 |
| Deuteranopia (no green cones) | #3B4968 | 0.019 |
| Tritanopia (no blue cones) | #125457 | 0.049 |
| Achromatopsia (no color) | #4B4B4B | 0.058 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #304E69
#304E69
oklch(41.3% 0.058 246.9)
- #604527
#604527
oklch(41.3% 0.058 68)
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 #304E69, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.033
- Charcoal #264653 ΔE 0.044
- Dark Slate Gray #2F4F4F ΔE 0.046
- Deep Sea Blue #015482 ΔE 0.047
- YInMn Blue #415A77 ΔE 0.048
- Light Navy #155084 ΔE 0.048
- Deep Teal #00555A ΔE 0.050
- Light Navy Blue #2E5A88 ΔE 0.056
Use #304E69 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.