#17316B
Closest named color: Marine Blue (#01386A). oklch(33% 0.106 263.5), rgb(23, 49, 107).
Aa
White text reads best on this color (12.44:1).
About this color
#17316B is a dark, moderately saturated blue. In OKLCH its lightness is 33%, its chroma 0.106 and its hue 263°. Its hue sits on the cool side of the wheel. The nearest named color is Marine Blue (#01386A), ΔE 0.023 away. White text reads best on it, at 12.44:1.
| Hue family | Blues |
| Lightness | dark (33%) |
| Chroma | moderately saturated (0.106) |
| Temperature | cool |
| Nearest name | Marine Blue (#01386A) |
| Black text | 1.68:1 |
| White text | 12.44:1 |
Values
| HEX | #17316B |
| RGB | rgb(23, 49, 107) |
| HSL | hsl(221, 65%, 25%) |
| OKLCH | oklch(33% 0.106 263.5) |
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 #17316B | 12.44:1 | AAA | Lc -101.4 | Preferred for body text |
| Black text on #17316B | 1.68:1 | Fails | Lc 0.0 | Not readable |
| #17316B text on white | 12.44:1 | AAA | Lc 97.9 | Preferred for body text |
| #17316B text on black | 1.68:1 | 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
#F2F6FD
oklch(97.2% 0.01 261.8)
-
Step 100
100
#E2EAFA
oklch(93.6% 0.023 264.5)
-
Step 200
200
#CADAF7
oklch(88.5% 0.044 262.4)
-
Step 300
300
#A6C1F5
oklch(80.9% 0.08 263.3)
-
Step 400
400
#779FF0
oklch(70.7% 0.127 263.5)
-
Step 500
500
#5484EB
oklch(63% 0.164 263.6)
-
Step 600
600
#3A6BD9
oklch(55.5% 0.177 263.6)
-
Step 700
700
#2D59BD
oklch(49.2% 0.165 263.6)
-
Step 800
800
#264999
oklch(42.7% 0.137 263.8)
-
Step 900
900 (this color)
#17316B
oklch(33% 0.106 263.5)
-
Step 950
950
#152547
oklch(27.1% 0.067 263.6)
#17316B 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) | #0C386D | 0.020 |
| Deuteranopia (no green cones) | #00306A | 0.018 |
| Tritanopia (no blue cones) | #003F49 | 0.084 |
| Achromatopsia (no color) | #343434 | 0.106 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #17316B
#17316B
oklch(33% 0.106 263.5)
- #463100
#463100
oklch(32.9% 0.068 82.4)
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 #17316B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine Blue #01386A ΔE 0.023
- Marine #042E60 ΔE 0.027
- Prussian Blue #1D3557 ΔE 0.040
- Twilight Blue #0A437A ΔE 0.055
- Midnight Blue #191970 ΔE 0.059
- Dark Blue Grey #1F3B4D ΔE 0.068
- Midnight Green #073B4C ΔE 0.070
- Space Cadet #2B2D42 ΔE 0.075
Use #17316B 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.