#304073
Closest named color: Twilight Blue (#0A437A). oklch(38.5% 0.089 268.8), rgb(48, 64, 115).
Aa
White text reads best on this color (9.96:1).
About this color
#304073 is a dark, moderately saturated blue. In OKLCH its lightness is 38%, its chroma 0.089 and its hue 269°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.034 away. White text reads best on it, at 9.96:1.
| Hue family | Blues |
| Lightness | dark (38%) |
| Chroma | moderately saturated (0.089) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 2.10:1 |
| White text | 9.96:1 |
Values
| HEX | #304073 |
| RGB | rgb(48, 64, 115) |
| HSL | hsl(226, 41%, 32%) |
| OKLCH | oklch(38.5% 0.089 268.8) |
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 #304073 | 9.96:1 | AAA | Lc -97.1 | Preferred for body text |
| Black text on #304073 | 2.10:1 | Fails | Lc 11.0 | Not readable |
| #304073 text on white | 9.96:1 | AAA | Lc 93.0 | Preferred for body text |
| #304073 text on black | 2.10:1 | Fails | Lc -9.5 | 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
#F3F5FC
oklch(97.1% 0.01 273.4)
-
Step 100
100
#E4EAF7
oklch(93.6% 0.019 266)
-
Step 200
200
#CFD9F3
oklch(88.6% 0.037 268.9)
-
Step 300
300
#AFC0ED
oklch(81% 0.067 268.7)
-
Step 400
400
#859EE4
oklch(70.8% 0.107 268.6)
-
Step 500
500
#6784DC
oklch(63.1% 0.137 268.5)
-
Step 600
600
#506CCA
oklch(55.7% 0.149 268.7)
-
Step 700
700
#4159AE
oklch(49% 0.138 269)
-
Step 800
800
#35498D
oklch(42.6% 0.115 268.8)
-
Step 900
900 (this color)
#304073
oklch(38.5% 0.089 268.8)
-
Step 950
950
#1B2542
oklch(27.1% 0.056 268.2)
#304073 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) | #2A4675 | 0.018 |
| Deuteranopia (no green cones) | #224072 | 0.017 |
| Tritanopia (no blue cones) | #084B54 | 0.079 |
| Achromatopsia (no color) | #434343 | 0.089 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #304073
#304073
oklch(38.5% 0.089 268.8)
- #554100
#554100
oklch(38.6% 0.079 88.8)
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 #304073, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.034
- Cobalt #1E488F ΔE 0.050
- Dark Grey Blue #29465B ΔE 0.051
- Light Navy #155084 ΔE 0.052
- Marine Blue #01386A ΔE 0.054
- Dark Slate Blue #483D8B ΔE 0.056
- Deep Sea Blue #015482 ΔE 0.063
- Prussian Blue #1D3557 ΔE 0.063
Use #304073 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.