#18286B
Closest named color: Marine (#042E60). oklch(31% 0.118 268.3), rgb(24, 40, 107).
Aa
White text reads best on this color (13.50:1).
About this color
#18286B is a dark, moderately saturated blue. In OKLCH its lightness is 31%, its chroma 0.118 and its hue 268°. Its hue sits on the cool side of the wheel. The nearest named color is Marine (#042E60), ΔE 0.030 away. White text reads best on it, at 13.50:1.
| Hue family | Blues |
| Lightness | dark (31%) |
| Chroma | moderately saturated (0.118) |
| Temperature | cool |
| Nearest name | Marine (#042E60) |
| Black text | 1.55:1 |
| White text | 13.50:1 |
Values
| HEX | #18286B |
| RGB | rgb(24, 40, 107) |
| HSL | hsl(228, 63%, 26%) |
| OKLCH | oklch(31% 0.118 268.3) |
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 #18286B | 13.50:1 | AAA | Lc -102.8 | Preferred for body text |
| Black text on #18286B | 1.55:1 | Fails | Lc 0.0 | Not readable |
| #18286B text on white | 13.50:1 | AAA | Lc 99.6 | Preferred for body text |
| #18286B text on black | 1.55:1 | 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 950.
-
Step 50
50
#F1F5FF
oklch(97% 0.014 268.5)
-
Step 100
100
#E1EAFF
oklch(93.7% 0.03 267.2)
-
Step 200
200
#C9D9FF
oklch(88.6% 0.055 267.2)
-
Step 300
300
#A6BFFF
oklch(80.9% 0.095 267.8)
-
Step 400
400
#799AFF
oklch(70.6% 0.153 268.6)
-
Step 500
500
#587DFF
oklch(63.1% 0.197 268.3)
-
Step 600
600
#3B5BFF
oklch(55.6% 0.244 268.3)
-
Step 700
700
#2A30FF
oklch(49% 0.287 268.3)
-
Step 800
800
#212BCF
oklch(42.6% 0.241 268.2)
-
Step 900
900
#1C2DA2
oklch(37.7% 0.186 268.2)
-
Step 950
950 (this color)
#18286B
oklch(31% 0.118 268.3)
#18286B 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) | #00326D | 0.029 |
| Deuteranopia (no green cones) | #002B6A | 0.019 |
| Tritanopia (no blue cones) | #003945 | 0.094 |
| Achromatopsia (no color) | #2E2E2E | 0.119 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #18286B
#18286B
oklch(31% 0.118 268.3)
- #3E2E00
#3E2E00
oklch(31.1% 0.064 87.7)
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 #18286B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine #042E60 ΔE 0.030
- Midnight Blue #191970 ΔE 0.035
- Marine Blue #01386A ΔE 0.045
- Prussian Blue #1D3557 ΔE 0.056
- Dark Royal Blue #02066F ΔE 0.075
- Royal #0C1793 ΔE 0.075
- Deep Blue #040273 ΔE 0.077
- Twilight Blue #0A437A ΔE 0.078
Use #18286B 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.