#283970
Closest named color: Marine Blue (#01386A). oklch(36.1% 0.097 268.3), rgb(40, 57, 112).
Aa
White text reads best on this color (10.99:1).
About this color
#283970 is a dark, moderately saturated blue. In OKLCH its lightness is 36%, its chroma 0.097 and its hue 268°. Its hue sits on the cool side of the wheel. The nearest named color is Marine Blue (#01386A), ΔE 0.035 away. White text reads best on it, at 10.99:1.
| Hue family | Blues |
| Lightness | dark (36%) |
| Chroma | moderately saturated (0.097) |
| Temperature | cool |
| Nearest name | Marine Blue (#01386A) |
| Black text | 1.90:1 |
| White text | 10.99:1 |
Values
| HEX | #283970 |
| RGB | rgb(40, 57, 112) |
| HSL | hsl(226, 47%, 30%) |
| OKLCH | oklch(36.1% 0.097 268.3) |
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 #283970 | 10.99:1 | AAA | Lc -99.1 | Preferred for body text |
| Black text on #283970 | 1.90:1 | Fails | Lc 8.7 | Not readable |
| #283970 text on white | 10.99:1 | AAA | Lc 95.2 | Preferred for body text |
| #283970 text on black | 1.90:1 | Fails | Lc -7.4 | 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
#E4EAF9
oklch(93.7% 0.021 268.4)
-
Step 200
200
#CED9F5
oklch(88.6% 0.04 268.5)
-
Step 300
300
#ADC0F1
oklch(81% 0.073 268.2)
-
Step 400
400
#829DEA
oklch(70.7% 0.117 268.6)
-
Step 500
500
#6383E3
oklch(63.1% 0.149 268.1)
-
Step 600
600
#4C6AD1
oklch(55.6% 0.162 268.5)
-
Step 700
700
#3D58B5
oklch(49.1% 0.151 268.2)
-
Step 800
800
#324892
oklch(42.6% 0.125 268.3)
-
Step 900
900 (this color)
#283970
oklch(36.1% 0.097 268.3)
-
Step 950
950
#1A2444
oklch(26.9% 0.061 268.9)
#283970 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) | #1E4072 | 0.021 |
| Deuteranopia (no green cones) | #12396F | 0.023 |
| Tritanopia (no blue cones) | #00454F | 0.082 |
| Achromatopsia (no color) | #3C3C3C | 0.097 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #283970
#283970
oklch(36.1% 0.097 268.3)
- #4D3B00
#4D3B00
oklch(36.2% 0.074 89.3)
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 #283970, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine Blue #01386A ΔE 0.035
- Twilight Blue #0A437A ΔE 0.036
- Prussian Blue #1D3557 ΔE 0.047
- Marine #042E60 ΔE 0.058
- Dark Grey Blue #29465B ΔE 0.060
- Cobalt #1E488F ΔE 0.062
- Dark Blue Grey #1F3B4D ΔE 0.065
- Dark Slate Blue #483D8B ΔE 0.069
Use #283970 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.