#283568
Closest named color: Marine Blue (#01386A). oklch(34.6% 0.09 270.4), rgb(40, 53, 104).
Aa
White text reads best on this color (11.67:1).
About this color
#283568 is a dark, moderately saturated blue. In OKLCH its lightness is 35%, its chroma 0.090 and its hue 270°. Its hue sits on the cool side of the wheel. The nearest named color is Marine Blue (#01386A), ΔE 0.033 away. White text reads best on it, at 11.67:1.
| Hue family | Blues |
| Lightness | dark (35%) |
| Chroma | moderately saturated (0.090) |
| Temperature | cool |
| Nearest name | Marine Blue (#01386A) |
| Black text | 1.79:1 |
| White text | 11.67:1 |
Values
| HEX | #283568 |
| RGB | rgb(40, 53, 104) |
| HSL | hsl(228, 44%, 28%) |
| OKLCH | oklch(34.6% 0.09 270.4) |
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 #283568 | 11.67:1 | AAA | Lc -100.3 | Preferred for body text |
| Black text on #283568 | 1.79:1 | Fails | Lc 0.0 | Not readable |
| #283568 text on white | 11.67:1 | AAA | Lc 96.6 | Preferred for body text |
| #283568 text on black | 1.79:1 | 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
#F3F5FC
oklch(97.1% 0.01 273.4)
-
Step 100
100
#E5EAF7
oklch(93.7% 0.018 269.1)
-
Step 200
200
#CFD9F3
oklch(88.6% 0.037 268.9)
-
Step 300
300
#B0BFED
oklch(80.9% 0.067 270.7)
-
Step 400
400
#879DE5
oklch(70.8% 0.109 270.5)
-
Step 500
500
#6A83DD
oklch(63.2% 0.138 270.3)
-
Step 600
600
#536ACA
oklch(55.5% 0.15 270.7)
-
Step 700
700
#4358AF
oklch(49% 0.14 270.3)
-
Step 800
800
#37498E
oklch(42.8% 0.116 269.9)
-
Step 900
900 (this color)
#283568
oklch(34.6% 0.09 270.4)
-
Step 950
950
#1C2442
oklch(26.9% 0.057 270.9)
#283568 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) | #1D3B6A | 0.020 |
| Deuteranopia (no green cones) | #143667 | 0.022 |
| Tritanopia (no blue cones) | #004049 | 0.080 |
| Achromatopsia (no color) | #383838 | 0.090 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #283568
#283568
oklch(34.6% 0.09 270.4)
- #483700
#483700
oklch(34.6% 0.071 89.4)
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 #283568, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine Blue #01386A ΔE 0.033
- Prussian Blue #1D3557 ΔE 0.034
- Marine #042E60 ΔE 0.047
- Twilight Blue #0A437A ΔE 0.049
- Dark Blue Grey #1F3B4D ΔE 0.057
- Dark Grey Blue #29465B ΔE 0.063
- Midnight Green #073B4C ΔE 0.066
- Space Cadet #2B2D42 ΔE 0.067
Use #283568 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.