#304F70
Closest named color: Light Navy (#155084). oklch(41.9% 0.067 251.1), rgb(48, 79, 112).
Aa
White text reads best on this color (8.47:1).
About this color
#304F70 is a dark, muted blue. In OKLCH its lightness is 42%, its chroma 0.067 and its hue 251°. Its hue sits on the cool side of the wheel. The nearest named color is Light Navy (#155084), ΔE 0.038 away. White text reads best on it, at 8.47:1.
| Hue family | Blues |
| Lightness | dark (42%) |
| Chroma | muted (0.067) |
| Temperature | cool |
| Nearest name | Light Navy (#155084) |
| Black text | 2.47:1 |
| White text | 8.47:1 |
Values
| HEX | #304F70 |
| RGB | rgb(48, 79, 112) |
| HSL | hsl(211, 40%, 31%) |
| OKLCH | oklch(41.9% 0.067 251.1) |
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 #304F70 | 8.47:1 | AAA | Lc -93.6 | Preferred for body text |
| Black text on #304F70 | 2.47:1 | Fails | Lc 14.9 | Not readable |
| #304F70 text on white | 8.47:1 | AAA | Lc 89.1 | Fine for body text |
| #304F70 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
#E4EBF1
oklch(93.6% 0.011 243.7)
-
Step 200
200
#CFDAE7
oklch(88.4% 0.022 252.5)
-
Step 300
300
#AFC3DA
oklch(80.9% 0.039 252)
-
Step 400
400
#84A4C7
oklch(70.7% 0.063 251)
-
Step 500
500
#658DB8
oklch(63.1% 0.079 250.9)
-
Step 600
600
#4B76A4
oklch(55.4% 0.087 251.2)
-
Step 700
700
#3C638D
oklch(49% 0.081 251.4)
-
Step 800
800 (this color)
#304F70
oklch(41.9% 0.067 251.1)
-
Step 900
900
#2C435C
oklch(37.5% 0.052 251.3)
-
Step 950
950
#1A2836
oklch(27.1% 0.032 249.1)
#304F70 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) | #415071 | 0.022 |
| Deuteranopia (no green cones) | #394A6F | 0.017 |
| Tritanopia (no blue cones) | #07575B | 0.058 |
| Achromatopsia (no color) | #4D4D4D | 0.067 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #304F70
#304F70
oklch(41.9% 0.067 251.1)
- #644620
#644620
oklch(41.9% 0.067 70.6)
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 #304F70, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Light Navy #155084 ΔE 0.038
- Deep Sea Blue #015482 ΔE 0.039
- YInMn Blue #415A77 ΔE 0.042
- Dark Grey Blue #29465B ΔE 0.043
- Light Navy Blue #2E5A88 ΔE 0.046
- Dusk Blue #26538D ΔE 0.047
- Dusk #4E5481 ΔE 0.053
- Charcoal #264653 ΔE 0.054
Use #304F70 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.