#304673
Closest named color: Twilight Blue (#0A437A). oklch(39.9% 0.081 263.4), rgb(48, 70, 115).
Aa
White text reads best on this color (9.33:1).
About this color
#304673 is a dark, moderately saturated blue. In OKLCH its lightness is 40%, its chroma 0.081 and its hue 263°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.037 away. White text reads best on it, at 9.33:1.
| Hue family | Blues |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.081) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 2.24:1 |
| White text | 9.33:1 |
Values
| HEX | #304673 |
| RGB | rgb(48, 70, 115) |
| HSL | hsl(220, 41%, 32%) |
| OKLCH | oklch(39.9% 0.081 263.4) |
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 #304673 | 9.33:1 | AAA | Lc -95.7 | Preferred for body text |
| Black text on #304673 | 2.24:1 | Fails | Lc 12.5 | Not readable |
| #304673 text on white | 9.33:1 | AAA | Lc 91.4 | Preferred for body text |
| #304673 text on black | 2.24:1 | Fails | Lc -10.9 | 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
#F3F5FB
oklch(97% 0.008 271.3)
-
Step 100
100
#E4EAF6
oklch(93.6% 0.017 264.5)
-
Step 200
200
#CEDAF0
oklch(88.6% 0.033 262.7)
-
Step 300
300
#ACC1E9
oklch(80.9% 0.061 263.2)
-
Step 400
400
#81A0DE
oklch(70.7% 0.098 263.6)
-
Step 500
500
#6187D5
oklch(63% 0.126 263.5)
-
Step 600
600
#4970C2
oklch(55.7% 0.135 263.5)
-
Step 700
700
#3A5DA7
oklch(49.1% 0.125 263.4)
-
Step 800
800
#304C88
oklch(42.6% 0.105 263.7)
-
Step 900
900 (this color)
#304673
oklch(39.9% 0.081 263.4)
-
Step 950
950
#192640
oklch(27.1% 0.052 263.2)
#304673 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) | #344A75 | 0.014 |
| Deuteranopia (no green cones) | #2B4472 | 0.009 |
| Tritanopia (no blue cones) | #065057 | 0.073 |
| Achromatopsia (no color) | #474747 | 0.081 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #304673
#304673
oklch(39.9% 0.081 263.4)
- #5C4301
#5C4301
oklch(40% 0.081 84.2)
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 #304673, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.037
- Light Navy #155084 ΔE 0.040
- Dark Grey Blue #29465B ΔE 0.043
- Cobalt #1E488F ΔE 0.048
- Deep Sea Blue #015482 ΔE 0.049
- Dusk Blue #26538D ΔE 0.052
- Charcoal #264653 ΔE 0.058
- Dark Slate Blue #483D8B ΔE 0.061
Use #304673 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.