#304B79
Closest named color: Light Navy (#155084). oklch(41.4% 0.084 260.5), rgb(48, 75, 121).
Aa
White text reads best on this color (8.72:1).
About this color
#304B79 is a dark, moderately saturated blue. In OKLCH its lightness is 41%, its chroma 0.084 and its hue 260°. Its hue sits on the cool side of the wheel. The nearest named color is Light Navy (#155084), ΔE 0.028 away. White text reads best on it, at 8.72:1.
| Hue family | Blues |
| Lightness | dark (41%) |
| Chroma | moderately saturated (0.084) |
| Temperature | cool |
| Nearest name | Light Navy (#155084) |
| Black text | 2.40:1 |
| White text | 8.72:1 |
Values
| HEX | #304B79 |
| RGB | rgb(48, 75, 121) |
| HSL | hsl(218, 43%, 33%) |
| OKLCH | oklch(41.4% 0.084 260.5) |
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 #304B79 | 8.72:1 | AAA | Lc -94.2 | Preferred for body text |
| Black text on #304B79 | 2.40:1 | Fails | Lc 14.2 | Not readable |
| #304B79 text on white | 8.72:1 | AAA | Lc 89.7 | Fine for body text |
| #304B79 text on black | 2.40:1 | Fails | Lc -12.5 | 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 800.
-
Step 50
50
#F3F6FA
oklch(97.2% 0.006 255.5)
-
Step 100
100
#E4EAF4
oklch(93.5% 0.015 260.7)
-
Step 200
200
#CFDAEC
oklch(88.5% 0.028 260.3)
-
Step 300
300
#AFC2E1
oklch(81% 0.049 260.2)
-
Step 400
400
#84A2D2
oklch(70.8% 0.078 259.7)
-
Step 500
500
#668AC6
oklch(63.2% 0.1 260.3)
-
Step 600
600
#4D73B3
oklch(55.7% 0.109 260.3)
-
Step 700
700
#3E609A
oklch(49.1% 0.102 260.5)
-
Step 800
800 (this color)
#304B79
oklch(41.4% 0.084 260.5)
-
Step 900
900
#2D4264
oklch(37.8% 0.064 259.7)
-
Step 950
950
#1B273B
oklch(27.2% 0.041 260.3)
#304B79 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) | #384F7B | 0.017 |
| Deuteranopia (no green cones) | #2E4878 | 0.010 |
| Tritanopia (no blue cones) | #00555C | 0.074 |
| Achromatopsia (no color) | #4B4B4B | 0.084 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #304B79
#304B79
oklch(41.4% 0.084 260.5)
- #634603
#634603
oklch(41.5% 0.084 81)
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 #304B79, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Light Navy #155084 ΔE 0.028
- Deep Sea Blue #015482 ΔE 0.037
- Dusk Blue #26538D ΔE 0.037
- Cobalt #1E488F ΔE 0.043
- Twilight Blue #0A437A ΔE 0.043
- Light Navy Blue #2E5A88 ΔE 0.047
- Dark Grey Blue #29465B ΔE 0.052
- Dusk #4E5481 ΔE 0.053
Use #304B79 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.