#18286C
Closest named color: Marine (#042E60). oklch(31.1% 0.12 268.3), rgb(24, 40, 108).
Aa
White text reads best on this color (13.47:1).
About this color
#18286C is a dark, moderately saturated blue. In OKLCH its lightness is 31%, its chroma 0.120 and its hue 268°. Its hue sits on the cool side of the wheel. The nearest named color is Marine (#042E60), ΔE 0.031 away. White text reads best on it, at 13.47:1.
| Hue family | Blues |
| Lightness | dark (31%) |
| Chroma | moderately saturated (0.120) |
| Temperature | cool |
| Nearest name | Marine (#042E60) |
| Black text | 1.55:1 |
| White text | 13.47:1 |
Values
| HEX | #18286C |
| RGB | rgb(24, 40, 108) |
| HSL | hsl(229, 64%, 26%) |
| OKLCH | oklch(31.1% 0.12 268.3) |
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 #18286C | 13.47:1 | AAA | Lc -102.7 | Preferred for body text |
| Black text on #18286C | 1.55:1 | Fails | Lc 0.0 | Not readable |
| #18286C text on white | 13.47:1 | AAA | Lc 99.5 | Preferred for body text |
| #18286C 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
#212AD0
oklch(42.6% 0.242 268.3)
-
Step 900
900
#1C2CA4
oklch(37.8% 0.19 268.3)
-
Step 950
950 (this color)
#18286C
oklch(31.1% 0.12 268.3)
#18286C 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) | #00336E | 0.031 |
| Deuteranopia (no green cones) | #002B6B | 0.019 |
| Tritanopia (no blue cones) | #003945 | 0.096 |
| Achromatopsia (no color) | #2F2F2F | 0.120 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #18286C
#18286C
oklch(31.1% 0.12 268.3)
- #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 #18286C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine #042E60 ΔE 0.031
- Midnight Blue #191970 ΔE 0.035
- Marine Blue #01386A ΔE 0.046
- Prussian Blue #1D3557 ΔE 0.057
- Royal #0C1793 ΔE 0.073
- Dark Royal Blue #02066F ΔE 0.074
- Deep Blue #040273 ΔE 0.076
- Twilight Blue #0A437A ΔE 0.077
Use #18286C 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.