#304285
Closest named color: Cobalt (#1E488F). oklch(40.2% 0.114 269.4), rgb(48, 66, 133).
Aa
White text reads best on this color (9.35:1).
About this color
#304285 is a dark, moderately saturated blue. In OKLCH its lightness is 40%, its chroma 0.114 and its hue 269°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.026 away. White text reads best on it, at 9.35:1.
| Hue family | Blues |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.114) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.24:1 |
| White text | 9.35:1 |
Values
| HEX | #304285 |
| RGB | rgb(48, 66, 133) |
| HSL | hsl(227, 47%, 35%) |
| OKLCH | oklch(40.2% 0.114 269.4) |
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 #304285 | 9.35:1 | AAA | Lc -95.7 | Preferred for body text |
| Black text on #304285 | 2.24:1 | Fails | Lc 12.6 | Not readable |
| #304285 text on white | 9.35:1 | AAA | Lc 91.4 | Preferred for body text |
| #304285 text on black | 2.24:1 | Fails | Lc -11.0 | 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
#F2F5FD
oklch(97% 0.011 269.6)
-
Step 100
100
#E3EAFB
oklch(93.7% 0.024 267.9)
-
Step 200
200
#CCD8FA
oklch(88.4% 0.049 270)
-
Step 300
300
#AABFF9
oklch(80.9% 0.086 269)
-
Step 400
400
#7E9BF6
oklch(70.7% 0.137 269.3)
-
Step 500
500
#607FF2
oklch(63.1% 0.175 269.5)
-
Step 600
600
#4965E1
oklch(55.6% 0.191 269.6)
-
Step 700
700
#3B53C3
oklch(49.1% 0.177 269.6)
-
Step 800
800
#30459E
oklch(42.8% 0.147 269.2)
-
Step 900
900 (this color)
#304285
oklch(40.2% 0.114 269.4)
-
Step 950
950
#182349
oklch(26.9% 0.072 269)
#304285 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) | #1F4B87 | 0.028 |
| Deuteranopia (no green cones) | #0E4384 | 0.030 |
| Tritanopia (no blue cones) | #00515D | 0.097 |
| Achromatopsia (no color) | #474747 | 0.114 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #304285
#304285
oklch(40.2% 0.114 269.4)
- #5A4500
#5A4500
oklch(40.2% 0.082 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 #304285, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.026
- Dark Slate Blue #483D8B ΔE 0.038
- Twilight Blue #0A437A ΔE 0.039
- Blueberry #464196 ΔE 0.043
- Light Navy #155084 ΔE 0.044
- Dusk Blue #26538D ΔE 0.048
- Deep Sea Blue #015482 ΔE 0.058
- Twilight #4E518B ΔE 0.064
Use #304285 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.