#17366F
Closest named color: Marine Blue (#01386A). oklch(34.5% 0.106 261.3), rgb(23, 54, 111).
Aa
White text reads best on this color (11.70:1).
About this color
#17366F is a dark, moderately saturated blue. In OKLCH its lightness is 34%, its chroma 0.106 and its hue 261°. Its hue sits on the cool side of the wheel. The nearest named color is Marine Blue (#01386A), ΔE 0.018 away. White text reads best on it, at 11.70:1.
| Hue family | Blues |
| Lightness | dark (34%) |
| Chroma | moderately saturated (0.106) |
| Temperature | cool |
| Nearest name | Marine Blue (#01386A) |
| Black text | 1.79:1 |
| White text | 11.70:1 |
Values
| HEX | #17366F |
| RGB | rgb(23, 54, 111) |
| HSL | hsl(219, 66%, 26%) |
| OKLCH | oklch(34.5% 0.106 261.3) |
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 #17366F | 11.70:1 | AAA | Lc -100.2 | Preferred for body text |
| Black text on #17366F | 1.79:1 | Fails | Lc 7.3 | Not readable |
| #17366F text on white | 11.70:1 | AAA | Lc 96.5 | Preferred for body text |
| #17366F text on black | 1.79:1 | 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
#F1F6FD
oklch(97.1% 0.011 256.7)
-
Step 100
100
#E1EAFA
oklch(93.5% 0.024 262.1)
-
Step 200
200
#C9DAF7
oklch(88.5% 0.044 261.2)
-
Step 300
300
#A4C2F5
oklch(81% 0.08 260.9)
-
Step 400
400
#73A0EF
oklch(70.7% 0.126 261.1)
-
Step 500
500
#4F86EA
oklch(63.1% 0.162 261.3)
-
Step 600
600
#336DD8
oklch(55.6% 0.175 261.3)
-
Step 700
700
#265ABC
oklch(49.1% 0.164 261.6)
-
Step 800
800
#204A98
oklch(42.6% 0.136 261.4)
-
Step 900
900 (this color)
#17366F
oklch(34.5% 0.106 261.3)
-
Step 950
950
#132547
oklch(26.9% 0.068 261.9)
#17366F 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) | #153C71 | 0.017 |
| Deuteranopia (no green cones) | #00346E | 0.018 |
| Tritanopia (no blue cones) | #00444D | 0.084 |
| Achromatopsia (no color) | #383838 | 0.106 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #17366F
#17366F
oklch(34.5% 0.106 261.3)
- #4C3400
#4C3400
oklch(34.4% 0.071 80.2)
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 #17366F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine Blue #01386A ΔE 0.018
- Marine #042E60 ΔE 0.039
- Twilight Blue #0A437A ΔE 0.040
- Prussian Blue #1D3557 ΔE 0.042
- Dark Blue Grey #1F3B4D ΔE 0.066
- Midnight Green #073B4C ΔE 0.069
- Dark Grey Blue #29465B ΔE 0.071
- Midnight Blue #191970 ΔE 0.072
Use #17366F 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.