#304B7D
Closest named color: Light Navy (#155084). oklch(41.7% 0.09 261.8), rgb(48, 75, 125).
Aa
White text reads best on this color (8.64:1).
About this color
#304B7D is a dark, moderately saturated blue. In OKLCH its lightness is 42%, its chroma 0.090 and its hue 262°. Its hue sits on the cool side of the wheel. The nearest named color is Light Navy (#155084), ΔE 0.026 away. White text reads best on it, at 8.64:1.
| Hue family | Blues |
| Lightness | dark (42%) |
| Chroma | moderately saturated (0.090) |
| Temperature | cool |
| Nearest name | Light Navy (#155084) |
| Black text | 2.42:1 |
| White text | 8.64:1 |
Values
| HEX | #304B7D |
| RGB | rgb(48, 75, 125) |
| HSL | hsl(219, 45%, 34%) |
| OKLCH | oklch(41.7% 0.09 261.8) |
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 #304B7D | 8.64:1 | AAA | Lc -94.0 | Preferred for body text |
| Black text on #304B7D | 2.42:1 | Fails | Lc 14.5 | Not readable |
| #304B7D text on white | 8.64:1 | AAA | Lc 89.5 | Fine for body text |
| #304B7D text on black | 2.42:1 | Fails | Lc -12.7 | 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
#F3F6FA
oklch(97.2% 0.006 255.5)
-
Step 100
100
#E4EAF4
oklch(93.5% 0.015 260.7)
-
Step 200
200
#CFDAED
oklch(88.6% 0.029 261.5)
-
Step 300
300
#AEC1E3
oklch(80.8% 0.053 262.1)
-
Step 400
400
#84A1D6
oklch(70.7% 0.085 262.2)
-
Step 500
500
#6589CB
oklch(63.1% 0.108 261.9)
-
Step 600
600
#4C72B7
oklch(55.6% 0.116 261.5)
-
Step 700
700
#3D5F9E
oklch(49.1% 0.109 261.8)
-
Step 800
800 (this color)
#304B7D
oklch(41.7% 0.09 261.8)
-
Step 900
900
#2C4167
oklch(37.7% 0.071 261.6)
-
Step 950
950
#1A263C
oklch(26.9% 0.045 261.9)
#304B7D 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) | #364F7F | 0.015 |
| Deuteranopia (no green cones) | #2B487C | 0.011 |
| Tritanopia (no blue cones) | #00565E | 0.078 |
| Achromatopsia (no color) | #4C4C4C | 0.090 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #304B7D
#304B7D
oklch(41.7% 0.09 261.8)
- #634700
#634700
oklch(41.7% 0.086 82.7)
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 #304B7D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Light Navy #155084 ΔE 0.026
- Dusk Blue #26538D ΔE 0.032
- Deep Sea Blue #015482 ΔE 0.036
- Cobalt #1E488F ΔE 0.037
- Twilight Blue #0A437A ΔE 0.043
- Light Navy Blue #2E5A88 ΔE 0.045
- Dusk #4E5481 ΔE 0.052
- Twilight #4E518B ΔE 0.052
Use #304B7D 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.