#304F77
Closest named color: Light Navy (#155084). oklch(42.3% 0.077 255.4), rgb(48, 79, 119).
Aa
White text reads best on this color (8.36:1).
About this color
#304F77 is a dark, moderately saturated blue. In OKLCH its lightness is 42%, its chroma 0.077 and its hue 255°. Its hue sits on the cool side of the wheel. The nearest named color is Light Navy (#155084), ΔE 0.029 away. White text reads best on it, at 8.36:1.
| Hue family | Blues |
| Lightness | dark (42%) |
| Chroma | moderately saturated (0.077) |
| Temperature | cool |
| Nearest name | Light Navy (#155084) |
| Black text | 2.51:1 |
| White text | 8.36:1 |
Values
| HEX | #304F77 |
| RGB | rgb(48, 79, 119) |
| HSL | hsl(214, 43%, 33%) |
| OKLCH | oklch(42.3% 0.077 255.4) |
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 #304F77 | 8.36:1 | AAA | Lc -93.3 | Preferred for body text |
| Black text on #304F77 | 2.51:1 | Fails | Lc 15.3 | Dividers and decoration only |
| #304F77 text on white | 8.36:1 | AAA | Lc 88.7 | Fine for body text |
| #304F77 text on black | 2.51:1 | Fails | Lc -13.5 | 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
#E4EAF3
oklch(93.5% 0.014 258.3)
-
Step 200
200
#CFDAEA
oklch(88.5% 0.025 257.6)
-
Step 300
300
#AEC3DE
oklch(81% 0.045 254.8)
-
Step 400
400
#83A3CD
oklch(70.7% 0.071 255.4)
-
Step 500
500
#638CC0
oklch(63.1% 0.091 254.8)
-
Step 600
600
#4A75AD
oklch(55.6% 0.1 255.5)
-
Step 700
700
#3B6294
oklch(49.1% 0.092 255.3)
-
Step 800
800 (this color)
#304F77
oklch(42.3% 0.077 255.4)
-
Step 900
900
#2B4361
oklch(37.8% 0.06 254.6)
-
Step 950
950
#1A2739
oklch(27% 0.038 256.7)
#304F77 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) | #3F5179 | 0.021 |
| Deuteranopia (no green cones) | #354B76 | 0.012 |
| Tritanopia (no blue cones) | #00585D | 0.067 |
| Achromatopsia (no color) | #4E4E4E | 0.077 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #304F77
#304F77
oklch(42.3% 0.077 255.4)
- #664716
#664716
oklch(42.3% 0.076 74.9)
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 #304F77, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Light Navy #155084 ΔE 0.029
- Deep Sea Blue #015482 ΔE 0.033
- Dusk Blue #26538D ΔE 0.036
- Light Navy Blue #2E5A88 ΔE 0.039
- YInMn Blue #415A77 ΔE 0.042
- Dusk #4E5481 ΔE 0.047
- Cobalt #1E488F ΔE 0.052
- Dark Grey Blue #29465B ΔE 0.052
Use #304F77 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.