#18386D
Closest named color: Marine Blue (#01386A). oklch(34.8% 0.1 260), rgb(24, 56, 109).
Aa
White text reads best on this color (11.50:1).
About this color
#18386D is a dark, moderately saturated blue. In OKLCH its lightness is 35%, its chroma 0.100 and its hue 260°. Its hue sits on the cool side of the wheel. The nearest named color is Marine Blue (#01386A), ΔE 0.016 away. White text reads best on it, at 11.50:1.
| Hue family | Blues |
| Lightness | dark (35%) |
| Chroma | moderately saturated (0.100) |
| Temperature | cool |
| Nearest name | Marine Blue (#01386A) |
| Black text | 1.82:1 |
| White text | 11.50:1 |
Values
| HEX | #18386D |
| RGB | rgb(24, 56, 109) |
| HSL | hsl(217, 64%, 26%) |
| OKLCH | oklch(34.8% 0.1 260) |
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 #18386D | 11.50:1 | AAA | Lc -99.9 | Preferred for body text |
| Black text on #18386D | 1.82:1 | Fails | Lc 7.7 | Not readable |
| #18386D text on white | 11.50:1 | AAA | Lc 96.2 | Preferred for body text |
| #18386D text on black | 1.82:1 | 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
#F2F6FC
oklch(97.2% 0.009 258.3)
-
Step 100
100
#E2EAF9
oklch(93.5% 0.022 263.2)
-
Step 200
200
#C9DAF5
oklch(88.4% 0.042 259.6)
-
Step 300
300
#A5C2F2
oklch(80.9% 0.075 260.4)
-
Step 400
400
#74A1EB
oklch(70.7% 0.12 260)
-
Step 500
500
#4F87E5
oklch(63% 0.154 260.1)
-
Step 600
600
#336FD3
oklch(55.6% 0.167 260.1)
-
Step 700
700
#255CB6
oklch(49% 0.154 259.9)
-
Step 800
800
#204C94
oklch(42.8% 0.128 259.8)
-
Step 900
900 (this color)
#18386D
oklch(34.8% 0.1 260)
-
Step 950
950
#132645
oklch(27.1% 0.063 259.7)
#18386D 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) | #1C3D6F | 0.016 |
| Deuteranopia (no green cones) | #08366C | 0.014 |
| Tritanopia (no blue cones) | #00454D | 0.079 |
| Achromatopsia (no color) | #393939 | 0.100 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #18386D
#18386D
oklch(34.8% 0.1 260)
- #4E3500
#4E3500
oklch(34.9% 0.072 79.5)
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 #18386D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine Blue #01386A ΔE 0.016
- Twilight Blue #0A437A ΔE 0.036
- Prussian Blue #1D3557 ΔE 0.038
- Marine #042E60 ΔE 0.042
- Dark Blue Grey #1F3B4D ΔE 0.060
- Dark Grey Blue #29465B ΔE 0.064
- Midnight Green #073B4C ΔE 0.064
- Cobalt #1E488F ΔE 0.071
Use #18386D 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.