#172A47
Closest named color: Oxford Blue (#1B263B). oklch(28.5% 0.059 258.6), rgb(23, 42, 71).
Aa
White text reads best on this color (14.39:1).
About this color
#172A47 is a dark, muted blue. In OKLCH its lightness is 28%, its chroma 0.059 and its hue 259°. Its hue sits on the cool side of the wheel. The nearest named color is Oxford Blue (#1B263B), ΔE 0.023 away. White text reads best on it, at 14.39:1.
| Hue family | Blues |
| Lightness | dark (28%) |
| Chroma | muted (0.059) |
| Temperature | cool |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.45:1 |
| White text | 14.39:1 |
Values
| HEX | #172A47 |
| RGB | rgb(23, 42, 71) |
| HSL | hsl(216, 51%, 18%) |
| OKLCH | oklch(28.5% 0.059 258.6) |
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 #172A47 | 14.39:1 | AAA | Lc -104.0 | Preferred for body text |
| Black text on #172A47 | 1.45:1 | Fails | Lc 0.0 | Not readable |
| #172A47 text on white | 14.39:1 | AAA | Lc 101.0 | Preferred for body text |
| #172A47 text on black | 1.45:1 | 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
#CADAF3
oklch(88.4% 0.039 259.3)
-
Step 300
300
#A5C2EE
oklch(80.8% 0.07 258.6)
-
Step 400
400
#75A2E6
oklch(70.8% 0.112 258.4)
-
Step 500
500
#5089DF
oklch(63.2% 0.143 258.4)
-
Step 600
600
#3471CD
oklch(55.7% 0.156 258.6)
-
Step 700
700
#265EB1
oklch(49.1% 0.145 258.5)
-
Step 800
800
#214D8F
oklch(42.7% 0.12 258.6)
-
Step 900
900
#204172
oklch(37.7% 0.093 258.2)
-
Step 950
950 (this color)
#172A47
oklch(28.5% 0.059 258.6)
#172A47 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) | #1E2C48 | 0.012 |
| Deuteranopia (no green cones) | #172846 | 0.007 |
| Tritanopia (no blue cones) | #003135 | 0.051 |
| Achromatopsia (no color) | #2A2A2A | 0.059 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #172A47
#172A47
oklch(28.5% 0.059 258.6)
- #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 #172A47, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Oxford Blue #1B263B ΔE 0.023
- Space Cadet #2B2D42 ΔE 0.034
- Dark #1B2431 ΔE 0.041
- Gunmetal #293241 ΔE 0.042
- Prussian Blue #1D3557 ΔE 0.044
- Marine #042E60 ΔE 0.046
- Jet #212529 ΔE 0.055
- Midnight Green #073B4C ΔE 0.055
Use #172A47 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.