#304D86
Closest named color: Dusk Blue (#26538D). oklch(42.7% 0.101 262.6), rgb(48, 77, 134).
Aa
White text reads best on this color (8.29:1).
About this color
#304D86 is a dark, moderately saturated blue. In OKLCH its lightness is 43%, its chroma 0.101 and its hue 263°. Its hue sits on the cool side of the wheel. The nearest named color is Dusk Blue (#26538D), ΔE 0.020 away. White text reads best on it, at 8.29:1.
| Hue family | Blues |
| Lightness | dark (43%) |
| Chroma | moderately saturated (0.101) |
| Temperature | cool |
| Nearest name | Dusk Blue (#26538D) |
| Black text | 2.53:1 |
| White text | 8.29:1 |
Values
| HEX | #304D86 |
| RGB | rgb(48, 77, 134) |
| HSL | hsl(220, 47%, 36%) |
| OKLCH | oklch(42.7% 0.101 262.6) |
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 #304D86 | 8.29:1 | AAA | Lc -93.1 | Preferred for body text |
| Black text on #304D86 | 2.53:1 | Fails | Lc 15.6 | Dividers and decoration only |
| #304D86 text on white | 8.29:1 | AAA | Lc 88.4 | Fine for body text |
| #304D86 text on black | 2.53:1 | Fails | Lc -13.7 | 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
#F3F6FB
oklch(97.2% 0.007 260.7)
-
Step 100
100
#E4EAF6
oklch(93.6% 0.017 264.5)
-
Step 200
200
#CEDAF0
oklch(88.6% 0.033 262.7)
-
Step 300
300
#ACC1E8
oklch(80.8% 0.06 262.8)
-
Step 400
400
#81A1DC
oklch(70.8% 0.094 262.3)
-
Step 500
500
#6188D2
oklch(63.1% 0.12 262.3)
-
Step 600
600
#4870C0
oklch(55.5% 0.133 262.8)
-
Step 700
700
#3A5EA5
oklch(49.1% 0.121 262.5)
-
Step 800
800 (this color)
#304D86
oklch(42.7% 0.101 262.6)
-
Step 900
900
#2A406B
oklch(37.6% 0.079 262.7)
-
Step 950
950
#19263F
oklch(27% 0.05 262.6)
#304D86 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) | #345288 | 0.016 |
| Deuteranopia (no green cones) | #274B85 | 0.012 |
| Tritanopia (no blue cones) | #005A63 | 0.085 |
| Achromatopsia (no color) | #4E4E4E | 0.101 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #304D86
#304D86
oklch(42.7% 0.101 262.6)
- #664900
#664900
oklch(42.6% 0.088 82.4)
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 #304D86, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusk Blue #26538D ΔE 0.020
- Light Navy #155084 ΔE 0.024
- Cobalt #1E488F ΔE 0.029
- Deep Sea Blue #015482 ΔE 0.035
- Light Navy Blue #2E5A88 ΔE 0.038
- Twilight #4E518B ΔE 0.044
- Denim Blue #3B5B92 ΔE 0.046
- Dusk #4E5481 ΔE 0.049
Use #304D86 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.