#304085
Closest named color: Cobalt (#1E488F). oklch(39.7% 0.117 270.5), rgb(48, 64, 133).
Aa
White text reads best on this color (9.55:1).
About this color
#304085 is a dark, moderately saturated blue. In OKLCH its lightness is 40%, its chroma 0.117 and its hue 270°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.029 away. White text reads best on it, at 9.55:1.
| Hue family | Blues |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.117) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.19:1 |
| White text | 9.55:1 |
Values
| HEX | #304085 |
| RGB | rgb(48, 64, 133) |
| HSL | hsl(229, 47%, 35%) |
| OKLCH | oklch(39.7% 0.117 270.5) |
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 #304085 | 9.55:1 | AAA | Lc -96.1 | Preferred for body text |
| Black text on #304085 | 2.19:1 | Fails | Lc 12.1 | Not readable |
| #304085 text on white | 9.55:1 | AAA | Lc 91.9 | Preferred for body text |
| #304085 text on black | 2.19:1 | Fails | Lc -10.5 | 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
#F2F5FE
oklch(97% 0.012 271.3)
-
Step 100
100
#E3E9FB
oklch(93.5% 0.025 271.1)
-
Step 200
200
#CDD8FA
oklch(88.5% 0.048 271.2)
-
Step 300
300
#ABBEFA
oklch(80.9% 0.088 270.8)
-
Step 400
400
#809AF8
oklch(70.7% 0.141 270.8)
-
Step 500
500
#627EF4
oklch(63.1% 0.179 270.5)
-
Step 600
600
#4B64E3
oklch(55.7% 0.194 270.4)
-
Step 700
700
#3D52C5
oklch(49.2% 0.18 270.5)
-
Step 800
800
#3244A0
oklch(42.8% 0.15 270.4)
-
Step 900
900 (this color)
#304085
oklch(39.7% 0.117 270.5)
-
Step 950
950
#19234A
oklch(27.1% 0.073 270.1)
#304085 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) | #1A4987 | 0.030 |
| Deuteranopia (no green cones) | #054284 | 0.035 |
| Tritanopia (no blue cones) | #00505C | 0.100 |
| Achromatopsia (no color) | #454545 | 0.117 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #304085
#304085
oklch(39.7% 0.117 270.5)
- #584400
#584400
oklch(39.7% 0.081 89.6)
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 #304085, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.029
- Dark Slate Blue #483D8B ΔE 0.038
- Twilight Blue #0A437A ΔE 0.039
- Blueberry #464196 ΔE 0.043
- Light Navy #155084 ΔE 0.049
- Dusk Blue #26538D ΔE 0.053
- Deep Sea Blue #015482 ΔE 0.063
- Sapphire #2138AB ΔE 0.068
Use #304085 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.