#172A48
Closest named color: Oxford Blue (#1B263B). oklch(28.6% 0.061 259.2), rgb(23, 42, 72).
Aa
White text reads best on this color (14.37:1).
About this color
#172A48 is a dark, muted blue. In OKLCH its lightness is 29%, its chroma 0.061 and its hue 259°. Its hue sits on the cool side of the wheel. The nearest named color is Oxford Blue (#1B263B), ΔE 0.025 away. White text reads best on it, at 14.37:1.
| Hue family | Blues |
| Lightness | dark (29%) |
| Chroma | muted (0.061) |
| Temperature | cool |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.46:1 |
| White text | 14.37:1 |
Values
| HEX | #172A48 |
| RGB | rgb(23, 42, 72) |
| HSL | hsl(217, 52%, 19%) |
| OKLCH | oklch(28.6% 0.061 259.2) |
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 #172A48 | 14.37:1 | AAA | Lc -104.0 | Preferred for body text |
| Black text on #172A48 | 1.46:1 | Fails | Lc 0.0 | Not readable |
| #172A48 text on white | 14.37:1 | AAA | Lc 101.0 | Preferred for body text |
| #172A48 text on black | 1.46:1 | 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
#F2F6FC
oklch(97.2% 0.009 258.3)
-
Step 100
100
#E2EBF8
oklch(93.7% 0.02 257.5)
-
Step 200
200
#CADAF4
oklch(88.4% 0.04 260.1)
-
Step 300
300
#A5C2F0
oklch(80.9% 0.073 259.5)
-
Step 400
400
#74A1E8
oklch(70.6% 0.116 259.2)
-
Step 500
500
#5088E1
oklch(63.1% 0.147 259.3)
-
Step 600
600
#3370CF
oklch(55.6% 0.16 259.1)
-
Step 700
700
#265DB3
oklch(49% 0.149 259.3)
-
Step 800
800
#214D91
oklch(42.8% 0.122 259)
-
Step 900
900
#204074
oklch(37.6% 0.097 259.6)
-
Step 950
950 (this color)
#172A48
oklch(28.6% 0.061 259.2)
#172A48 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) | #1D2C49 | 0.011 |
| Deuteranopia (no green cones) | #172847 | 0.007 |
| Tritanopia (no blue cones) | #003135 | 0.052 |
| Achromatopsia (no color) | #2A2A2A | 0.061 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #172A48
#172A48
oklch(28.6% 0.061 259.2)
- #3A2600
#3A2600
oklch(28.6% 0.059 78.6)
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 #172A48, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Oxford Blue #1B263B ΔE 0.025
- Space Cadet #2B2D42 ΔE 0.034
- Prussian Blue #1D3557 ΔE 0.043
- Dark #1B2431 ΔE 0.043
- Gunmetal #293241 ΔE 0.043
- Marine #042E60 ΔE 0.044
- Midnight Green #073B4C ΔE 0.055
- Jet #212529 ΔE 0.057
Use #172A48 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.