#304368
Closest named color: Dark Grey Blue (#29465B). oklch(38.5% 0.068 262.9), rgb(48, 67, 104).
Aa
White text reads best on this color (9.86:1).
About this color
#304368 is a dark, muted blue. In OKLCH its lightness is 38%, its chroma 0.068 and its hue 263°. 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 9.86:1.
| Hue family | Blues |
| Lightness | dark (38%) |
| Chroma | muted (0.068) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.12:1 |
| White text | 9.86:1 |
Values
| HEX | #304368 |
| RGB | rgb(48, 67, 104) |
| HSL | hsl(220, 37%, 30%) |
| OKLCH | oklch(38.5% 0.068 262.9) |
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 #304368 | 9.86:1 | AAA | Lc -97.0 | Preferred for body text |
| Black text on #304368 | 2.12:1 | Fails | Lc 11.1 | Not readable |
| #304368 text on white | 9.86:1 | AAA | Lc 92.8 | Preferred for body text |
| #304368 text on black | 2.12:1 | Fails | Lc -9.7 | 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
#F3F5FA
oklch(97% 0.007 268.5)
-
Step 100
100
#E5EAF4
oklch(93.6% 0.015 264.5)
-
Step 200
200
#CFDAEC
oklch(88.5% 0.028 260.3)
-
Step 300
300
#AFC1E2
oklch(80.8% 0.051 262.6)
-
Step 400
400
#86A1D4
oklch(70.8% 0.081 262.8)
-
Step 500
500
#6889C9
oklch(63.2% 0.104 262.9)
-
Step 600
600
#4F72B5
oklch(55.7% 0.112 262.4)
-
Step 700
700
#405F9C
oklch(49.1% 0.105 262.8)
-
Step 800
800
#354E7F
oklch(42.8% 0.087 262.8)
-
Step 900
900 (this color)
#304368
oklch(38.5% 0.068 262.9)
-
Step 950
950
#1B263C
oklch(27% 0.044 263.4)
#304368 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) | #35466A | 0.012 |
| Deuteranopia (no green cones) | #2E4167 | 0.007 |
| Tritanopia (no blue cones) | #164B50 | 0.062 |
| Achromatopsia (no color) | #434343 | 0.068 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #304368
#304368
oklch(38.5% 0.068 262.9)
- #554012
#554012
oklch(38.5% 0.068 83.4)
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 #304368, 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 0.043
- Twilight Blue #0A437A ΔE 0.043
- Light Navy #155084 ΔE 0.056
- Dark Blue Grey #1F3B4D ΔE 0.056
- Prussian Blue #1D3557 ΔE 0.058
- Marine Blue #01386A ΔE 0.058
- Deep Sea Blue #015482 ΔE 0.062
Use #304368 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.