#304A75
Closest named color: Light Navy (#155084). oklch(41% 0.079 260), rgb(48, 74, 117).
Aa
White text reads best on this color (8.89:1).
About this color
#304A75 is a dark, moderately saturated blue. In OKLCH its lightness is 41%, its chroma 0.079 and its hue 260°. 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 8.89:1.
| Hue family | Blues |
| Lightness | dark (41%) |
| Chroma | moderately saturated (0.079) |
| Temperature | cool |
| Nearest name | Light Navy (#155084) |
| Black text | 2.36:1 |
| White text | 8.89:1 |
Values
| HEX | #304A75 |
| RGB | rgb(48, 74, 117) |
| HSL | hsl(217, 42%, 32%) |
| OKLCH | oklch(41% 0.079 260) |
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 #304A75 | 8.89:1 | AAA | Lc -94.7 | Preferred for body text |
| Black text on #304A75 | 2.36:1 | Fails | Lc 13.7 | Not readable |
| #304A75 text on white | 8.89:1 | AAA | Lc 90.2 | Preferred for body text |
| #304A75 text on black | 2.36:1 | Fails | Lc -12.1 | 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
#F3F6FA
oklch(97.2% 0.006 255.5)
-
Step 100
100
#E5EAF3
oklch(93.6% 0.013 262.4)
-
Step 200
200
#CFDAEB
oklch(88.5% 0.026 259)
-
Step 300
300
#AFC2DF
oklch(80.9% 0.046 258.8)
-
Step 400
400
#86A2CF
oklch(70.8% 0.073 259.8)
-
Step 500
500
#678AC3
oklch(63.1% 0.095 259.9)
-
Step 600
600
#4F73AF
oklch(55.6% 0.103 260.2)
-
Step 700
700
#406097
oklch(49.1% 0.096 260.7)
-
Step 800
800 (this color)
#304A75
oklch(41% 0.079 260)
-
Step 900
900
#2E4262
oklch(37.8% 0.061 259.5)
-
Step 950
950
#1B273A
oklch(27.1% 0.039 259.4)
#304A75 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) | #384D77 | 0.015 |
| Deuteranopia (no green cones) | #304774 | 0.009 |
| Tritanopia (no blue cones) | #00545A | 0.071 |
| Achromatopsia (no color) | #4A4A4A | 0.079 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #304A75
#304A75
oklch(41% 0.079 260)
- #61450B
#61450B
oklch(41.1% 0.079 80)
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 #304A75, 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 0.040
- Twilight Blue #0A437A ΔE 0.042
- Dusk Blue #26538D ΔE 0.043
- Dark Grey Blue #29465B ΔE 0.046
- Cobalt #1E488F ΔE 0.048
- Light Navy Blue #2E5A88 ΔE 0.052
- YInMn Blue #415A77 ΔE 0.056
Use #304A75 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.