#283668
Closest named color: Marine Blue (#01386A). oklch(34.9% 0.089 269.6), rgb(40, 54, 104).
Aa
White text reads best on this color (11.55:1).
About this color
#283668 is a dark, moderately saturated blue. In OKLCH its lightness is 35%, its chroma 0.089 and its hue 270°. Its hue sits on the cool side of the wheel. The nearest named color is Marine Blue (#01386A), ΔE 0.032 away. White text reads best on it, at 11.55:1.
| Hue family | Blues |
| Lightness | dark (35%) |
| Chroma | moderately saturated (0.089) |
| Temperature | cool |
| Nearest name | Marine Blue (#01386A) |
| Black text | 1.81:1 |
| White text | 11.55:1 |
Values
| HEX | #283668 |
| RGB | rgb(40, 54, 104) |
| HSL | hsl(227, 44%, 28%) |
| OKLCH | oklch(34.9% 0.089 269.6) |
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 #283668 | 11.55:1 | AAA | Lc -100.1 | Preferred for body text |
| Black text on #283668 | 1.81:1 | Fails | Lc 7.5 | Not readable |
| #283668 text on white | 11.55:1 | AAA | Lc 96.4 | Preferred for body text |
| #283668 text on black | 1.81:1 | 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
#CFD9F2
oklch(88.5% 0.036 268.3)
-
Step 300
300
#AFBFED
oklch(80.8% 0.068 269.9)
-
Step 400
400
#869DE4
oklch(70.7% 0.108 269.8)
-
Step 500
500
#6983DC
oklch(63% 0.137 269.8)
-
Step 600
600
#516BC9
oklch(55.5% 0.148 269.5)
-
Step 700
700
#4259AE
oklch(49.1% 0.138 269.4)
-
Step 800
800
#37498D
oklch(42.7% 0.114 269.9)
-
Step 900
900 (this color)
#283668
oklch(34.9% 0.089 269.6)
-
Step 950
950
#1C2442
oklch(26.9% 0.057 270.9)
#283668 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) | #1F3C6A | 0.019 |
| Deuteranopia (no green cones) | #163667 | 0.021 |
| Tritanopia (no blue cones) | #00414A | 0.078 |
| Achromatopsia (no color) | #393939 | 0.089 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #283668
#283668
oklch(34.9% 0.089 269.6)
- #493800
#493800
oklch(35% 0.071 89.7)
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 #283668, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine Blue #01386A ΔE 0.032
- Prussian Blue #1D3557 ΔE 0.034
- Twilight Blue #0A437A ΔE 0.048
- Marine #042E60 ΔE 0.048
- Dark Blue Grey #1F3B4D ΔE 0.055
- Dark Grey Blue #29465B ΔE 0.060
- Midnight Green #073B4C ΔE 0.065
- Space Cadet #2B2D42 ΔE 0.068
Use #283668 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.