#17315A
Closest named color: Prussian Blue (#1D3557). oklch(31.6% 0.08 259.2), rgb(23, 49, 90).
Aa
White text reads best on this color (12.93:1).
About this color
#17315A is a dark, moderately saturated blue. In OKLCH its lightness is 32%, its chroma 0.080 and its hue 259°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.017 away. White text reads best on it, at 12.93:1.
| Hue family | Blues |
| Lightness | dark (32%) |
| Chroma | moderately saturated (0.080) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.62:1 |
| White text | 12.93:1 |
Values
| HEX | #17315A |
| RGB | rgb(23, 49, 90) |
| HSL | hsl(217, 59%, 22%) |
| OKLCH | oklch(31.6% 0.08 259.2) |
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 #17315A | 12.93:1 | AAA | Lc -102.2 | Preferred for body text |
| Black text on #17315A | 1.62:1 | Fails | Lc 0.0 | Not readable |
| #17315A text on white | 12.93:1 | AAA | Lc 98.9 | Preferred for body text |
| #17315A text on black | 1.62:1 | 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 950.
-
Step 50
50
#F0F6FE
oklch(97.1% 0.012 255.5)
-
Step 100
100
#DFEBFD
oklch(93.6% 0.028 258.4)
-
Step 200
200
#C5DBFD
oklch(88.6% 0.053 259)
-
Step 300
300
#9CC2FE
oklch(80.9% 0.095 259.4)
-
Step 400
400
#64A0FE
oklch(70.7% 0.152 259.1)
-
Step 500
500
#3784FC
oklch(63% 0.194 259.3)
-
Step 600
600
#0B6AEB
oklch(55.6% 0.211 259.2)
-
Step 700
700
#0058CB
oklch(49.1% 0.193 259.2)
-
Step 800
800
#0448A5
oklch(42.6% 0.162 259.2)
-
Step 900
900
#103E83
oklch(37.7% 0.126 259.1)
-
Step 950
950 (this color)
#17315A
oklch(31.6% 0.08 259.2)
#17315A 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) | #1E355C | 0.016 |
| Deuteranopia (no green cones) | #122F59 | 0.009 |
| Tritanopia (no blue cones) | #003A41 | 0.063 |
| Achromatopsia (no color) | #313131 | 0.080 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #17315A
#17315A
oklch(31.6% 0.08 259.2)
- #432D00
#432D00
oklch(31.5% 0.065 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 #17315A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.017
- Marine #042E60 ΔE 0.022
- Marine Blue #01386A ΔE 0.033
- Dark Blue Grey #1F3B4D ΔE 0.046
- Midnight Green #073B4C ΔE 0.047
- Space Cadet #2B2D42 ΔE 0.048
- Gunmetal #293241 ΔE 0.051
- Oxford Blue #1B263B ΔE 0.061
Use #17315A 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.