#304F6E
Closest named color: Dark Grey Blue (#29465B). oklch(41.8% 0.064 249.6), rgb(48, 79, 110).
Aa
White text reads best on this color (8.50:1).
About this color
#304F6E is a dark, muted blue. In OKLCH its lightness is 42%, its chroma 0.064 and its hue 250°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.040 away. White text reads best on it, at 8.50:1.
| Hue family | Blues |
| Lightness | dark (42%) |
| Chroma | muted (0.064) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.46:1 |
| White text | 8.50:1 |
Values
| HEX | #304F6E |
| RGB | rgb(48, 79, 110) |
| HSL | hsl(210, 39%, 31%) |
| OKLCH | oklch(41.8% 0.064 249.6) |
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 #304F6E | 8.50:1 | AAA | Lc -93.7 | Preferred for body text |
| Black text on #304F6E | 2.46:1 | Fails | Lc 14.8 | Not readable |
| #304F6E text on white | 8.50:1 | AAA | Lc 89.2 | Fine for body text |
| #304F6E text on black | 2.46:1 | 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
#E5EBF1
oklch(93.7% 0.01 247.9)
-
Step 200
200
#CFDBE7
oklch(88.6% 0.021 248.1)
-
Step 300
300
#AFC3D8
oklch(80.9% 0.037 249.6)
-
Step 400
400
#84A4C5
oklch(70.7% 0.06 249.5)
-
Step 500
500
#658DB6
oklch(63% 0.076 249.7)
-
Step 600
600
#4C77A2
oklch(55.6% 0.083 249.5)
-
Step 700
700
#3D648B
oklch(49.2% 0.077 249.6)
-
Step 800
800 (this color)
#304F6E
oklch(41.8% 0.064 249.6)
-
Step 900
900
#2C445B
oklch(37.8% 0.05 248.2)
-
Step 950
950
#1A2835
oklch(27% 0.031 247.2)
#304F6E 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) | #42506F | 0.024 |
| Deuteranopia (no green cones) | #3A4A6D | 0.018 |
| Tritanopia (no blue cones) | #0B565A | 0.054 |
| Achromatopsia (no color) | #4D4D4D | 0.064 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #304F6E
#304F6E
oklch(41.8% 0.064 249.6)
- #634623
#634623
oklch(41.8% 0.064 69.7)
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 #304F6E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.040
- Deep Sea Blue #015482 ΔE 0.041
- Light Navy #155084 ΔE 0.041
- YInMn Blue #415A77 ΔE 0.043
- Light Navy Blue #2E5A88 ΔE 0.048
- Dusk Blue #26538D ΔE 0.051
- Charcoal #264653 ΔE 0.052
- Dark Slate Gray #2F4F4F ΔE 0.054
Use #304F6E 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.