#304560
Closest named color: Dark Grey Blue (#29465B). oklch(38.5% 0.053 255.1), rgb(48, 69, 96).
Aa
White text reads best on this color (9.78:1).
About this color
#304560 is a dark, muted blue. In OKLCH its lightness is 39%, its chroma 0.053 and its hue 255°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.014 away. White text reads best on it, at 9.78:1.
| Hue family | Blues |
| Lightness | dark (39%) |
| Chroma | muted (0.053) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.14:1 |
| White text | 9.78:1 |
Values
| HEX | #304560 |
| RGB | rgb(48, 69, 96) |
| HSL | hsl(214, 33%, 28%) |
| OKLCH | oklch(38.5% 0.053 255.1) |
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 #304560 | 9.78:1 | AAA | Lc -96.8 | Preferred for body text |
| Black text on #304560 | 2.14:1 | Fails | Lc 11.3 | Not readable |
| #304560 text on white | 9.78:1 | AAA | Lc 92.6 | Preferred for body text |
| #304560 text on black | 2.14:1 | Fails | Lc -9.8 | 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 900.
-
Step 50
50
#F3F6F9
oklch(97.2% 0.005 247.9)
-
Step 100
100
#E5EAF2
oklch(93.6% 0.012 259.8)
-
Step 200
200
#D0DAE8
oklch(88.5% 0.022 256.7)
-
Step 300
300
#B0C2DB
oklch(80.8% 0.041 256.6)
-
Step 400
400
#86A3C9
oklch(70.7% 0.065 255.3)
-
Step 500
500
#678CBB
oklch(63.1% 0.083 254.8)
-
Step 600
600
#4F75A7
oklch(55.6% 0.089 255.7)
-
Step 700
700
#3F628F
oklch(49% 0.083 255.2)
-
Step 800
800
#345074
oklch(42.6% 0.069 255.2)
-
Step 900
900 (this color)
#304560
oklch(38.5% 0.053 255.1)
-
Step 950
950
#1B2737
oklch(26.9% 0.034 255.8)
#304560 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) | #3B4661 | 0.016 |
| Deuteranopia (no green cones) | #35425F | 0.011 |
| Tritanopia (no blue cones) | #1C4B4E | 0.047 |
| Achromatopsia (no color) | #444444 | 0.053 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #304560
#304560
oklch(38.5% 0.053 255.1)
- #544021
#544021
oklch(38.6% 0.054 77)
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 #304560, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.014
- Charcoal #264653 ΔE 0.028
- Dark Blue Grey #1F3B4D ΔE 0.049
- Dark Slate Gray #2F4F4F ΔE 0.050
- Charcoal Grey #3C4142 ΔE 0.051
- Twilight Blue #0A437A ΔE 0.055
- Onyx #343A40 ΔE 0.057
- Dark Teal #014D4E ΔE 0.059
Use #304560 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.