#172548
Closest named color: Oxford Blue (#1B263B). oklch(27.3% 0.068 265.7), rgb(23, 37, 72).
Aa
White text reads best on this color (15.05:1).
About this color
#172548 is a dark, muted blue. In OKLCH its lightness is 27%, its chroma 0.068 and its hue 266°. Its hue sits on the cool side of the wheel. The nearest named color is Oxford Blue (#1B263B), ΔE 0.026 away. White text reads best on it, at 15.05:1.
| Hue family | Blues |
| Lightness | dark (27%) |
| Chroma | muted (0.068) |
| Temperature | cool |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.39:1 |
| White text | 15.05:1 |
Values
| HEX | #172548 |
| RGB | rgb(23, 37, 72) |
| HSL | hsl(223, 52%, 19%) |
| OKLCH | oklch(27.3% 0.068 265.7) |
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 #172548 | 15.05:1 | AAA | Lc -104.6 | Preferred for body text |
| Black text on #172548 | 1.39:1 | Fails | Lc 0.0 | Not readable |
| #172548 text on white | 15.05:1 | AAA | Lc 101.8 | Preferred for body text |
| #172548 text on black | 1.39:1 | 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
#F2F5FD
oklch(97% 0.011 269.6)
-
Step 100
100
#E2EAFA
oklch(93.6% 0.023 264.5)
-
Step 200
200
#CBD9F8
oklch(88.5% 0.045 266.2)
-
Step 300
300
#A8C0F5
oklch(80.9% 0.08 265.7)
-
Step 400
400
#7A9EF1
oklch(70.8% 0.129 265.5)
-
Step 500
500
#5A83EC
oklch(63.2% 0.164 265.8)
-
Step 600
600
#416ADA
oklch(55.7% 0.178 265.7)
-
Step 700
700
#3357BD
oklch(49% 0.166 265.8)
-
Step 800
800
#2A4899
oklch(42.7% 0.137 265.6)
-
Step 900
900
#263D7A
oklch(37.7% 0.108 265.9)
-
Step 950
950 (this color)
#172548
oklch(27.3% 0.068 265.7)
#172548 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) | #152949 | 0.013 |
| Deuteranopia (no green cones) | #0E2447 | 0.012 |
| Tritanopia (no blue cones) | #002D33 | 0.058 |
| Achromatopsia (no color) | #262626 | 0.068 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #172548
#172548
oklch(27.3% 0.068 265.7)
- #332500
#332500
oklch(27.4% 0.056 87.1)
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 #172548, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Oxford Blue #1B263B ΔE 0.026
- Dark #1B2431 ΔE 0.043
- Space Cadet #2B2D42 ΔE 0.046
- Marine #042E60 ΔE 0.049
- Prussian Blue #1D3557 ΔE 0.056
- Gunmetal #293241 ΔE 0.057
- Jet #212529 ΔE 0.060
- Rich Black #0D1B2A ΔE 0.065
Use #172548 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.