#17376D
Closest named color: Marine Blue (#01386A). oklch(34.5% 0.101 260.2), rgb(23, 55, 109).
Aa
White text reads best on this color (11.64:1).
About this color
#17376D is a dark, moderately saturated blue. In OKLCH its lightness is 35%, its chroma 0.101 and its hue 260°. Its hue sits on the cool side of the wheel. The nearest named color is Marine Blue (#01386A), ΔE 0.015 away. White text reads best on it, at 11.64:1.
| Hue family | Blues |
| Lightness | dark (35%) |
| Chroma | moderately saturated (0.101) |
| Temperature | cool |
| Nearest name | Marine Blue (#01386A) |
| Black text | 1.80:1 |
| White text | 11.64:1 |
Values
| HEX | #17376D |
| RGB | rgb(23, 55, 109) |
| HSL | hsl(218, 65%, 26%) |
| OKLCH | oklch(34.5% 0.101 260.2) |
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 #17376D | 11.64:1 | AAA | Lc -100.1 | Preferred for body text |
| Black text on #17376D | 1.80:1 | Fails | Lc 7.5 | Not readable |
| #17376D text on white | 11.64:1 | AAA | Lc 96.4 | Preferred for body text |
| #17376D text on black | 1.80:1 | 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
#C9DAF6
oklch(88.4% 0.043 260.4)
-
Step 300
300
#A4C2F2
oklch(80.9% 0.076 259.7)
-
Step 400
400
#73A1EC
oklch(70.7% 0.121 259.8)
-
Step 500
500
#4F87E6
oklch(63.1% 0.155 260.3)
-
Step 600
600
#326FD4
oklch(55.7% 0.168 260)
-
Step 700
700
#255CB8
oklch(49.2% 0.157 260.2)
-
Step 800
800
#204B95
oklch(42.6% 0.131 260.5)
-
Step 900
900 (this color)
#17376D
oklch(34.5% 0.101 260.2)
-
Step 950
950
#132645
oklch(27.1% 0.063 259.7)
#17376D 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) | #1A3D6F | 0.019 |
| Deuteranopia (no green cones) | #04356C | 0.015 |
| Tritanopia (no blue cones) | #00444C | 0.080 |
| Achromatopsia (no color) | #383838 | 0.101 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #17376D
#17376D
oklch(34.5% 0.101 260.2)
- #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 #17376D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine Blue #01386A ΔE 0.015
- Prussian Blue #1D3557 ΔE 0.038
- Twilight Blue #0A437A ΔE 0.039
- Marine #042E60 ΔE 0.039
- Dark Blue Grey #1F3B4D ΔE 0.061
- Midnight Green #073B4C ΔE 0.065
- Dark Grey Blue #29465B ΔE 0.066
- Cobalt #1E488F ΔE 0.073
Use #17376D 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.