#283560
Closest named color: Prussian Blue (#1D3557). oklch(34.1% 0.077 269.3), rgb(40, 53, 96).
Aa
White text reads best on this color (11.87:1).
About this color
#283560 is a dark, moderately saturated blue. In OKLCH its lightness is 34%, its chroma 0.077 and its hue 269°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.022 away. White text reads best on it, at 11.87:1.
| Hue family | Blues |
| Lightness | dark (34%) |
| Chroma | moderately saturated (0.077) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.76:1 |
| White text | 11.87:1 |
Values
| HEX | #283560 |
| RGB | rgb(40, 53, 96) |
| HSL | hsl(226, 41%, 27%) |
| OKLCH | oklch(34.1% 0.077 269.3) |
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 #283560 | 11.87:1 | AAA | Lc -100.7 | Preferred for body text |
| Black text on #283560 | 1.76:1 | Fails | Lc 0.0 | Not readable |
| #283560 text on white | 11.87:1 | AAA | Lc 97.1 | Preferred for body text |
| #283560 text on black | 1.76:1 | Fails | Lc 0.0 | 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
#F3F5FB
oklch(97% 0.008 271.3)
-
Step 100
100
#E5EAF6
oklch(93.7% 0.017 267.8)
-
Step 200
200
#D0D9EF
oklch(88.5% 0.032 268)
-
Step 300
300
#B1C0E7
oklch(80.9% 0.058 268.6)
-
Step 400
400
#899EDB
oklch(70.7% 0.093 269.3)
-
Step 500
500
#6D85D1
oklch(63.1% 0.118 269.5)
-
Step 600
600
#556DBE
oklch(55.5% 0.129 269.4)
-
Step 700
700
#465BA4
oklch(49.1% 0.119 269.5)
-
Step 800
800
#394B85
oklch(42.8% 0.099 269)
-
Step 900
900 (this color)
#283560
oklch(34.1% 0.077 269.3)
-
Step 950
950
#1D253E
oklch(27% 0.048 269.5)
#283560 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) | #233A62 | 0.015 |
| Deuteranopia (no green cones) | #1C355F | 0.015 |
| Tritanopia (no blue cones) | #0A3E45 | 0.069 |
| Achromatopsia (no color) | #373737 | 0.078 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #283560
#283560
oklch(34.1% 0.077 269.3)
- #463600
#463600
oklch(34.1% 0.07 90.3)
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 #283560, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.022
- Marine Blue #01386A ΔE 0.036
- Dark Blue Grey #1F3B4D ΔE 0.045
- Marine #042E60 ΔE 0.045
- Space Cadet #2B2D42 ΔE 0.054
- Gunmetal #293241 ΔE 0.054
- Midnight Green #073B4C ΔE 0.055
- Dark Grey Blue #29465B ΔE 0.057
Use #283560 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.