#17334F
Closest named color: Prussian Blue (#1D3557). oklch(31.4% 0.061 250.4), rgb(23, 51, 79).
Aa
White text reads best on this color (12.94:1).
About this color
#17334F is a dark, muted blue. In OKLCH its lightness is 31%, its chroma 0.061 and its hue 250°. 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 12.94:1.
| Hue family | Blues |
| Lightness | dark (31%) |
| Chroma | muted (0.061) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.62:1 |
| White text | 12.94:1 |
Values
| HEX | #17334F |
| RGB | rgb(23, 51, 79) |
| HSL | hsl(210, 55%, 20%) |
| OKLCH | oklch(31.4% 0.061 250.4) |
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 #17334F | 12.94:1 | AAA | Lc -102.3 | Preferred for body text |
| Black text on #17334F | 1.62:1 | Fails | Lc 0.0 | Not readable |
| #17334F text on white | 12.94:1 | AAA | Lc 99.0 | Preferred for body text |
| #17334F 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
#F1F6FC
oklch(97.1% 0.01 252.8)
-
Step 100
100
#E0EBF8
oklch(93.6% 0.021 252.5)
-
Step 200
200
#C6DCF3
oklch(88.5% 0.04 249.5)
-
Step 300
300
#9EC5EE
oklch(81% 0.072 250)
-
Step 400
400
#66A5E6
oklch(70.6% 0.116 250.5)
-
Step 500
500
#378DDF
oklch(63.1% 0.148 250.6)
-
Step 600
600
#0075CB
oklch(55.5% 0.159 250.4)
-
Step 700
700
#0062AC
oklch(49% 0.141 250.5)
-
Step 800
800
#00508E
oklch(42.6% 0.122 250.5)
-
Step 900
900
#0F4372
oklch(37.6% 0.096 250.5)
-
Step 950
950 (this color)
#17334F
oklch(31.4% 0.061 250.4)
#17334F 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) | #273450 | 0.021 |
| Deuteranopia (no green cones) | #1F2F4E | 0.015 |
| Tritanopia (no blue cones) | #003A3D | 0.049 |
| Achromatopsia (no color) | #313131 | 0.061 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #17334F
#17334F
oklch(31.4% 0.061 250.4)
- #452B08
#452B08
oklch(31.4% 0.061 69.4)
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 #17334F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.017
- Midnight Green #073B4C ΔE 0.030
- Dark Blue Grey #1F3B4D ΔE 0.031
- Gunmetal #293241 ΔE 0.032
- Space Cadet #2B2D42 ΔE 0.035
- Marine #042E60 ΔE 0.040
- Marine Blue #01386A ΔE 0.048
- Oxford Blue #1B263B ΔE 0.050
Use #17334F 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.