#304E6E
Closest named color: Dark Grey Blue (#29465B). oklch(41.5% 0.065 251.1), rgb(48, 78, 110).
Aa
White text reads best on this color (8.60:1).
About this color
#304E6E is a dark, muted blue. In OKLCH its lightness is 42%, its chroma 0.065 and its hue 251°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.039 away. White text reads best on it, at 8.60:1.
| Hue family | Blues |
| Lightness | dark (42%) |
| Chroma | muted (0.065) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.44:1 |
| White text | 8.60:1 |
Values
| HEX | #304E6E |
| RGB | rgb(48, 78, 110) |
| HSL | hsl(211, 39%, 31%) |
| OKLCH | oklch(41.5% 0.065 251.1) |
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 #304E6E | 8.60:1 | AAA | Lc -94.0 | Preferred for body text |
| Black text on #304E6E | 2.44:1 | Fails | Lc 14.5 | Not readable |
| #304E6E text on white | 8.60:1 | AAA | Lc 89.5 | Fine for body text |
| #304E6E text on black | 2.44:1 | Fails | Lc -12.8 | 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
#E5EAF1
oklch(93.5% 0.011 256.7)
-
Step 200
200
#CFDAE7
oklch(88.4% 0.022 252.5)
-
Step 300
300
#AFC3D9
oklch(80.9% 0.038 250.8)
-
Step 400
400
#85A4C6
oklch(70.8% 0.061 251)
-
Step 500
500
#668DB7
oklch(63.1% 0.077 250.9)
-
Step 600
600
#4D76A3
oklch(55.5% 0.084 251.7)
-
Step 700
700
#3E638C
oklch(49% 0.079 252)
-
Step 800
800 (this color)
#304E6E
oklch(41.5% 0.065 251.1)
-
Step 900
900
#2D435C
oklch(37.6% 0.051 252.3)
-
Step 950
950
#1B2836
oklch(27.2% 0.032 250.9)
#304E6E 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) | #414F6F | 0.023 |
| Deuteranopia (no green cones) | #39496D | 0.017 |
| Tritanopia (no blue cones) | #0B5559 | 0.056 |
| Achromatopsia (no color) | #4C4C4C | 0.065 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #304E6E
#304E6E
oklch(41.5% 0.065 251.1)
- #624521
#624521
oklch(41.4% 0.065 70.2)
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 #304E6E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.039
- Light Navy #155084 ΔE 0.040
- Deep Sea Blue #015482 ΔE 0.041
- YInMn Blue #415A77 ΔE 0.045
- Light Navy Blue #2E5A88 ΔE 0.050
- Charcoal #264653 ΔE 0.051
- Dusk Blue #26538D ΔE 0.051
- Dark Slate Gray #2F4F4F ΔE 0.055
Use #304E6E 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.