#304B74
Closest named color: Light Navy (#155084). oklch(41.1% 0.077 258.5), rgb(48, 75, 116).
Aa
White text reads best on this color (8.80:1).
About this color
#304B74 is a dark, moderately saturated blue. In OKLCH its lightness is 41%, its chroma 0.077 and its hue 259°. Its hue sits on the cool side of the wheel. The nearest named color is Light Navy (#155084), ΔE 0.033 away. White text reads best on it, at 8.80:1.
| Hue family | Blues |
| Lightness | dark (41%) |
| Chroma | moderately saturated (0.077) |
| Temperature | cool |
| Nearest name | Light Navy (#155084) |
| Black text | 2.38:1 |
| White text | 8.80:1 |
Values
| HEX | #304B74 |
| RGB | rgb(48, 75, 116) |
| HSL | hsl(216, 41%, 32%) |
| OKLCH | oklch(41.1% 0.077 258.5) |
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 #304B74 | 8.80:1 | AAA | Lc -94.5 | Preferred for body text |
| Black text on #304B74 | 2.38:1 | Fails | Lc 14.0 | Not readable |
| #304B74 text on white | 8.80:1 | AAA | Lc 90.0 | Preferred for body text |
| #304B74 text on black | 2.38:1 | Fails | Lc -12.3 | 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
#CFDAEA
oklch(88.5% 0.025 257.6)
-
Step 300
300
#AFC2DE
oklch(80.9% 0.045 258)
-
Step 400
400
#85A2CE
oklch(70.7% 0.072 258.6)
-
Step 500
500
#678BC1
oklch(63.2% 0.091 258.3)
-
Step 600
600
#4E74AD
oklch(55.6% 0.099 258.3)
-
Step 700
700
#3F6195
oklch(49.1% 0.093 258.6)
-
Step 800
800 (this color)
#304B74
oklch(41.1% 0.077 258.5)
-
Step 900
900
#2E4261
oklch(37.7% 0.059 258.9)
-
Step 950
950
#1B2739
oklch(27.1% 0.038 258.3)
#304B74 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) | #3A4E76 | 0.017 |
| Deuteranopia (no green cones) | #324773 | 0.012 |
| Tritanopia (no blue cones) | #02545A | 0.068 |
| Achromatopsia (no color) | #4A4A4A | 0.077 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #304B74
#304B74
oklch(41.1% 0.077 258.5)
- #614510
#614510
oklch(41.1% 0.077 78.8)
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 #304B74, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Light Navy #155084 ΔE 0.033
- Deep Sea Blue #015482 ΔE 0.039
- Dusk Blue #26538D ΔE 0.043
- Dark Grey Blue #29465B ΔE 0.044
- Twilight Blue #0A437A ΔE 0.045
- Light Navy Blue #2E5A88 ΔE 0.050
- Cobalt #1E488F ΔE 0.050
- YInMn Blue #415A77 ΔE 0.053
Use #304B74 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.