#304480
Closest named color: Cobalt (#1E488F). oklch(40.3% 0.104 267.7), rgb(48, 68, 128).
Aa
White text reads best on this color (9.27:1).
About this color
#304480 is a dark, moderately saturated blue. In OKLCH its lightness is 40%, its chroma 0.104 and its hue 268°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.030 away. White text reads best on it, at 9.27:1.
| Hue family | Blues |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.104) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.26:1 |
| White text | 9.27:1 |
Values
| HEX | #304480 |
| RGB | rgb(48, 68, 128) |
| HSL | hsl(225, 45%, 35%) |
| OKLCH | oklch(40.3% 0.104 267.7) |
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 #304480 | 9.27:1 | AAA | Lc -95.5 | Preferred for body text |
| Black text on #304480 | 2.26:1 | Fails | Lc 12.8 | Not readable |
| #304480 text on white | 9.27:1 | AAA | Lc 91.2 | Preferred for body text |
| #304480 text on black | 2.26:1 | Fails | Lc -11.2 | 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 800.
-
Step 50
50
#F3F5FB
oklch(97% 0.008 271.3)
-
Step 100
100
#E5EAF6
oklch(93.7% 0.017 267.8)
-
Step 200
200
#CFD9F0
oklch(88.5% 0.033 266.9)
-
Step 300
300
#AFC0E9
oklch(80.9% 0.061 267.4)
-
Step 400
400
#869FDE
oklch(70.8% 0.097 267.3)
-
Step 500
500
#6985D5
oklch(63.1% 0.125 268.1)
-
Step 600
600
#516EC2
oklch(55.7% 0.135 267.6)
-
Step 700
700
#425BA7
oklch(49.1% 0.125 267.9)
-
Step 800
800 (this color)
#304480
oklch(40.3% 0.104 267.7)
-
Step 900
900
#2F3F6C
oklch(37.7% 0.08 267.7)
-
Step 950
950
#1B2540
oklch(27% 0.052 267.5)
#304480 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) | #284B82 | 0.020 |
| Deuteranopia (no green cones) | #1C447F | 0.021 |
| Tritanopia (no blue cones) | #00525B | 0.092 |
| Achromatopsia (no color) | #474747 | 0.104 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #304480
#304480
oklch(40.3% 0.104 267.7)
- #5B4500
#5B4500
oklch(40.3% 0.082 87.8)
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 #304480, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.030
- Twilight Blue #0A437A ΔE 0.035
- Light Navy #155084 ΔE 0.038
- Dark Slate Blue #483D8B ΔE 0.044
- Dusk Blue #26538D ΔE 0.045
- Blueberry #464196 ΔE 0.050
- Deep Sea Blue #015482 ΔE 0.051
- Twilight #4E518B ΔE 0.062
Use #304480 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.