#304569
Closest named color: Dark Grey Blue (#29465B). oklch(39% 0.067 260.7), rgb(48, 69, 105).
Aa
White text reads best on this color (9.62:1).
About this color
#304569 is a dark, muted blue. In OKLCH its lightness is 39%, its chroma 0.067 and its hue 261°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.028 away. White text reads best on it, at 9.62:1.
| Hue family | Blues |
| Lightness | dark (39%) |
| Chroma | muted (0.067) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.18:1 |
| White text | 9.62:1 |
Values
| HEX | #304569 |
| RGB | rgb(48, 69, 105) |
| HSL | hsl(218, 37%, 30%) |
| OKLCH | oklch(39% 0.067 260.7) |
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 #304569 | 9.62:1 | AAA | Lc -96.4 | Preferred for body text |
| Black text on #304569 | 2.18:1 | Fails | Lc 11.7 | Not readable |
| #304569 text on white | 9.62:1 | AAA | Lc 92.2 | Preferred for body text |
| #304569 text on black | 2.18:1 | Fails | Lc -10.2 | 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 900.
-
Step 50
50
#F3F6FA
oklch(97.2% 0.006 255.5)
-
Step 100
100
#E4EAF4
oklch(93.5% 0.015 260.7)
-
Step 200
200
#CFDAEC
oklch(88.5% 0.028 260.3)
-
Step 300
300
#AEC2E2
oklch(81% 0.05 259.8)
-
Step 400
400
#84A1D3
oklch(70.6% 0.081 261.1)
-
Step 500
500
#658AC8
oklch(63.2% 0.103 260.4)
-
Step 600
600
#4C72B4
oklch(55.4% 0.112 260.8)
-
Step 700
700
#3D609B
oklch(49.1% 0.103 260.3)
-
Step 800
800
#334E7E
oklch(42.6% 0.087 261.2)
-
Step 900
900 (this color)
#304569
oklch(39% 0.067 260.7)
-
Step 950
950
#1A263B
oklch(26.8% 0.043 261.2)
#304569 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) | #37486B | 0.014 |
| Deuteranopia (no green cones) | #304268 | 0.009 |
| Tritanopia (no blue cones) | #154D52 | 0.060 |
| Achromatopsia (no color) | #454545 | 0.067 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #304569
#304569
oklch(39% 0.067 260.7)
- #584115
#584115
oklch(39.1% 0.067 80.5)
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 #304569, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.028
- Charcoal #264653 ΔE 0.042
- Twilight Blue #0A437A ΔE 0.044
- Light Navy #155084 ΔE 0.052
- Deep Sea Blue #015482 ΔE 0.058
- Dark Blue Grey #1F3B4D ΔE 0.060
- Marine Blue #01386A ΔE 0.063
- Dark Slate Gray #2F4F4F ΔE 0.063
Use #304569 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.