#304E75
Closest named color: Light Navy (#155084). oklch(41.9% 0.075 255.5), rgb(48, 78, 117).
Aa
White text reads best on this color (8.49:1).
About this color
#304E75 is a dark, moderately saturated blue. In OKLCH its lightness is 42%, its chroma 0.075 and its hue 256°. Its hue sits on the cool side of the wheel. The nearest named color is Light Navy (#155084), ΔE 0.031 away. White text reads best on it, at 8.49:1.
| Hue family | Blues |
| Lightness | dark (42%) |
| Chroma | moderately saturated (0.075) |
| Temperature | cool |
| Nearest name | Light Navy (#155084) |
| Black text | 2.47:1 |
| White text | 8.49:1 |
Values
| HEX | #304E75 |
| RGB | rgb(48, 78, 117) |
| HSL | hsl(214, 42%, 32%) |
| OKLCH | oklch(41.9% 0.075 255.5) |
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 #304E75 | 8.49:1 | AAA | Lc -93.7 | Preferred for body text |
| Black text on #304E75 | 2.47:1 | Fails | Lc 14.9 | Not readable |
| #304E75 text on white | 8.49:1 | AAA | Lc 89.1 | Fine for body text |
| #304E75 text on black | 2.47:1 | Fails | Lc -13.1 | 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
#F3F6F9
oklch(97.2% 0.005 247.9)
-
Step 100
100
#E4EAF2
oklch(93.5% 0.013 255.5)
-
Step 200
200
#CFDAE9
oklch(88.5% 0.024 256.1)
-
Step 300
300
#AEC2DD
oklch(80.8% 0.044 255.9)
-
Step 400
400
#84A3CC
oklch(70.7% 0.07 255.6)
-
Step 500
500
#648CBF
oklch(63.1% 0.089 254.9)
-
Step 600
600
#4B75AB
oklch(55.6% 0.097 255.3)
-
Step 700
700
#3C6293
oklch(49.1% 0.09 255.4)
-
Step 800
800 (this color)
#304E75
oklch(41.9% 0.075 255.5)
-
Step 900
900
#2C4360
oklch(37.8% 0.058 254.7)
-
Step 950
950
#1A2738
oklch(26.9% 0.037 255.4)
#304E75 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) | #3E5077 | 0.020 |
| Deuteranopia (no green cones) | #354A74 | 0.012 |
| Tritanopia (no blue cones) | #00575C | 0.066 |
| Achromatopsia (no color) | #4D4D4D | 0.075 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #304E75
#304E75
oklch(41.9% 0.075 255.5)
- #644617
#644617
oklch(41.8% 0.074 75)
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 #304E75, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Light Navy #155084 ΔE 0.031
- Deep Sea Blue #015482 ΔE 0.035
- Dusk Blue #26538D ΔE 0.040
- Light Navy Blue #2E5A88 ΔE 0.042
- YInMn Blue #415A77 ΔE 0.045
- Dark Grey Blue #29465B ΔE 0.048
- Dusk #4E5481 ΔE 0.050
- Twilight Blue #0A437A ΔE 0.051
Use #304E75 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.