#304456
Closest named color: Dark Grey Blue (#29465B). oklch(37.8% 0.04 246.3), rgb(48, 68, 86).
Aa
White text reads best on this color (10.06:1).
About this color
#304456 is a dark, muted blue. In OKLCH its lightness is 38%, its chroma 0.040 and its hue 246°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.011 away. White text reads best on it, at 10.06:1.
| Hue family | Blues |
| Lightness | dark (38%) |
| Chroma | muted (0.040) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.08:1 |
| White text | 10.06:1 |
Values
| HEX | #304456 |
| RGB | rgb(48, 68, 86) |
| HSL | hsl(208, 28%, 26%) |
| OKLCH | oklch(37.8% 0.04 246.3) |
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 #304456 | 10.06:1 | AAA | Lc -97.4 | Preferred for body text |
| Black text on #304456 | 2.08:1 | Fails | Lc 10.6 | Not readable |
| #304456 text on white | 10.06:1 | AAA | Lc 93.3 | Preferred for body text |
| #304456 text on black | 2.08:1 | Fails | Lc -9.2 | 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
#F3F6F8
oklch(97.1% 0.004 236.5)
-
Step 100
100
#E5EAEF
oklch(93.5% 0.009 247.9)
-
Step 200
200
#D1DAE4
oklch(88.4% 0.017 250.9)
-
Step 300
300
#B2C3D3
oklch(80.9% 0.029 246.5)
-
Step 400
400
#89A4BD
oklch(70.7% 0.047 246.5)
-
Step 500
500
#6B8EAD
oklch(63.2% 0.061 245.7)
-
Step 600
600
#527798
oklch(55.5% 0.067 246.3)
-
Step 700
700
#436482
oklch(49.1% 0.062 246.8)
-
Step 800
800
#37526A
oklch(42.7% 0.052 246.2)
-
Step 900
900 (this color)
#304456
oklch(37.8% 0.04 246.3)
-
Step 950
950
#1C2832
oklch(27% 0.025 244)
#304456 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) | #3D4457 | 0.019 |
| Deuteranopia (no green cones) | #384056 | 0.016 |
| Tritanopia (no blue cones) | #22484A | 0.033 |
| Achromatopsia (no color) | #424242 | 0.040 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #304456
#304456
oklch(37.8% 0.04 246.3)
- #503E2B
#503E2B
oklch(37.8% 0.039 67.7)
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 #304456, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.011
- Charcoal #264653 ΔE 0.015
- Charcoal Grey #3C4142 ΔE 0.035
- Dark Blue Grey #1F3B4D ΔE 0.040
- Dark Slate Gray #2F4F4F ΔE 0.042
- Onyx #343A40 ΔE 0.042
- Dark Teal #014D4E ΔE 0.050
- Midnight Green #073B4C ΔE 0.055
Use #304456 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.