#17347C
Closest named color: Marine Blue (#01386A). oklch(35.1% 0.128 264.2), rgb(23, 52, 124).
Aa
White text reads best on this color (11.54:1).
About this color
#17347C is a dark, moderately saturated blue. In OKLCH its lightness is 35%, its chroma 0.128 and its hue 264°. Its hue sits on the cool side of the wheel. The nearest named color is Marine Blue (#01386A), ΔE 0.037 away. White text reads best on it, at 11.54:1.
| Hue family | Blues |
| Lightness | dark (35%) |
| Chroma | moderately saturated (0.128) |
| Temperature | cool |
| Nearest name | Marine Blue (#01386A) |
| Black text | 1.81:1 |
| White text | 11.54:1 |
Values
| HEX | #17347C |
| RGB | rgb(23, 52, 124) |
| HSL | hsl(223, 69%, 29%) |
| OKLCH | oklch(35.1% 0.128 264.2) |
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 #17347C | 11.54:1 | AAA | Lc -99.8 | Preferred for body text |
| Black text on #17347C | 1.81:1 | Fails | Lc 7.8 | Not readable |
| #17347C text on white | 11.54:1 | AAA | Lc 96.1 | Preferred for body text |
| #17347C text on black | 1.81:1 | 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
#F1F6FE
oklch(97.2% 0.012 259.8)
-
Step 100
100
#E1EAFD
oklch(93.6% 0.028 265.4)
-
Step 200
200
#C8DAFD
oklch(88.6% 0.052 263.7)
-
Step 300
300
#A2C0FF
oklch(80.9% 0.096 264.7)
-
Step 400
400
#709DFF
oklch(70.7% 0.152 264.2)
-
Step 500
500
#4B80FE
oklch(63% 0.196 264.3)
-
Step 600
600
#3066ED
oklch(55.7% 0.212 264.1)
-
Step 700
700
#2453CE
oklch(49.1% 0.197 264.3)
-
Step 800
800
#1E45A7
oklch(42.7% 0.164 264.1)
-
Step 900
900 (this color)
#17347C
oklch(35.1% 0.128 264.2)
-
Step 950
950
#12244D
oklch(27.1% 0.079 264)
#17347C 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) | #003E7E | 0.028 |
| Deuteranopia (no green cones) | #00357B | 0.014 |
| Tritanopia (no blue cones) | #004652 | 0.100 |
| Achromatopsia (no color) | #393939 | 0.128 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #17347C
#17347C
oklch(35.1% 0.128 264.2)
- #4C3700
#4C3700
oklch(35.1% 0.072 84.7)
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 #17347C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine Blue #01386A ΔE 0.037
- Twilight Blue #0A437A ΔE 0.043
- Marine #042E60 ΔE 0.055
- Cobalt #1E488F ΔE 0.064
- Prussian Blue #1D3557 ΔE 0.065
- Midnight Blue #191970 ΔE 0.068
- Royal #0C1793 ΔE 0.071
- Dark Slate Blue #483D8B ΔE 0.079
Use #17347C 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.