#283071
Closest named color: Marine Blue (#01386A). oklch(34.2% 0.111 273.7), rgb(40, 48, 113).
Aa
White text reads best on this color (11.99:1).
About this color
#283071 is a dark, moderately saturated blue. In OKLCH its lightness is 34%, its chroma 0.111 and its hue 274°. Its hue sits on the cool side of the wheel. The nearest named color is Marine Blue (#01386A), ΔE 0.041 away. White text reads best on it, at 11.99:1.
| Hue family | Blues |
| Lightness | dark (34%) |
| Chroma | moderately saturated (0.111) |
| Temperature | cool |
| Nearest name | Marine Blue (#01386A) |
| Black text | 1.75:1 |
| White text | 11.99:1 |
Values
| HEX | #283071 |
| RGB | rgb(40, 48, 113) |
| HSL | hsl(233, 48%, 30%) |
| OKLCH | oklch(34.2% 0.111 273.7) |
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 #283071 | 11.99:1 | AAA | Lc -100.7 | Preferred for body text |
| Black text on #283071 | 1.75:1 | Fails | Lc 0.0 | Not readable |
| #283071 text on white | 11.99:1 | AAA | Lc 97.1 | Preferred for body text |
| #283071 text on black | 1.75:1 | 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
#F3F5FD
oklch(97.1% 0.011 274.9)
-
Step 100
100
#E4E9FB
oklch(93.6% 0.025 273.5)
-
Step 200
200
#CFD8F9
oklch(88.6% 0.047 273.4)
-
Step 300
300
#AFBDF7
oklch(80.8% 0.084 273.9)
-
Step 400
400
#8799F3
oklch(70.7% 0.133 273.9)
-
Step 500
500
#6B7DEF
oklch(63.1% 0.171 273.8)
-
Step 600
600
#5563DE
oklch(55.7% 0.186 273.8)
-
Step 700
700
#4551C0
oklch(49% 0.172 273.5)
-
Step 800
800
#39439C
oklch(42.7% 0.144 273.8)
-
Step 900
900 (this color)
#283071
oklch(34.2% 0.111 273.7)
-
Step 950
950
#1C2248
oklch(26.9% 0.07 274)
#283071 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) | #023A73 | 0.038 |
| Deuteranopia (no green cones) | #003370 | 0.035 |
| Tritanopia (no blue cones) | #003F4B | 0.095 |
| Achromatopsia (no color) | #373737 | 0.112 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #283071
#283071
oklch(34.2% 0.111 273.7)
- #453700
#453700
oklch(34.2% 0.07 93)
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 #283071, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine Blue #01386A ΔE 0.041
- Marine #042E60 ΔE 0.049
- Prussian Blue #1D3557 ΔE 0.052
- Twilight Blue #0A437A ΔE 0.056
- Midnight Blue #191970 ΔE 0.063
- Dark Slate Blue #483D8B ΔE 0.078
- Dark Blue Grey #1F3B4D ΔE 0.078
- Cobalt #1E488F ΔE 0.078
Use #283071 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.