#304A73
Closest named color: Light Navy (#155084). oklch(40.8% 0.076 259.2), rgb(48, 74, 115).
Aa
White text reads best on this color (8.92:1).
About this color
#304A73 is a dark, moderately saturated blue. In OKLCH its lightness is 41%, its chroma 0.076 and its hue 259°. Its hue sits on the cool side of the wheel. The nearest named color is Light Navy (#155084), ΔE 0.035 away. White text reads best on it, at 8.92:1.
| Hue family | Blues |
| Lightness | dark (41%) |
| Chroma | moderately saturated (0.076) |
| Temperature | cool |
| Nearest name | Light Navy (#155084) |
| Black text | 2.35:1 |
| White text | 8.92:1 |
Values
| HEX | #304A73 |
| RGB | rgb(48, 74, 115) |
| HSL | hsl(217, 41%, 32%) |
| OKLCH | oklch(40.8% 0.076 259.2) |
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 #304A73 | 8.92:1 | AAA | Lc -94.8 | Preferred for body text |
| Black text on #304A73 | 2.35:1 | Fails | Lc 13.6 | Not readable |
| #304A73 text on white | 8.92:1 | AAA | Lc 90.3 | Preferred for body text |
| #304A73 text on black | 2.35:1 | Fails | Lc -12.0 | 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
#E5EAF3
oklch(93.6% 0.013 262.4)
-
Step 200
200
#D0DAEA
oklch(88.6% 0.025 259.8)
-
Step 300
300
#B0C2DE
oklch(80.9% 0.044 259.2)
-
Step 400
400
#86A2CE
oklch(70.7% 0.072 259.3)
-
Step 500
500
#688AC1
oklch(63% 0.092 259.8)
-
Step 600
600
#4F74AD
oklch(55.7% 0.099 258.8)
-
Step 700
700
#406195
oklch(49.2% 0.092 259.2)
-
Step 800
800 (this color)
#304A73
oklch(40.8% 0.076 259.2)
-
Step 900
900
#2E4261
oklch(37.7% 0.059 258.9)
-
Step 950
950
#1B2739
oklch(27.1% 0.038 258.3)
#304A73 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) | #394D75 | 0.016 |
| Deuteranopia (no green cones) | #314772 | 0.009 |
| Tritanopia (no blue cones) | #045359 | 0.068 |
| Achromatopsia (no color) | #4A4A4A | 0.076 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #304A73
#304A73
oklch(40.8% 0.076 259.2)
- #60440F
#60440F
oklch(40.8% 0.077 78.6)
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 #304A73, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Light Navy #155084 ΔE 0.035
- Deep Sea Blue #015482 ΔE 0.041
- Dark Grey Blue #29465B ΔE 0.043
- Twilight Blue #0A437A ΔE 0.043
- Dusk Blue #26538D ΔE 0.046
- Cobalt #1E488F ΔE 0.051
- Light Navy Blue #2E5A88 ΔE 0.053
- YInMn Blue #415A77 ΔE 0.056
Use #304A73 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.