#172B54
Closest named color: Marine (#042E60). oklch(29.7% 0.079 262.9), rgb(23, 43, 84).
Aa
White text reads best on this color (13.90:1).
About this color
#172B54 is a dark, moderately saturated blue. In OKLCH its lightness is 30%, its chroma 0.079 and its hue 263°. Its hue sits on the cool side of the wheel. The nearest named color is Marine (#042E60), ΔE 0.025 away. White text reads best on it, at 13.90:1.
| Hue family | Blues |
| Lightness | dark (30%) |
| Chroma | moderately saturated (0.079) |
| Temperature | cool |
| Nearest name | Marine (#042E60) |
| Black text | 1.51:1 |
| White text | 13.90:1 |
Values
| HEX | #172B54 |
| RGB | rgb(23, 43, 84) |
| HSL | hsl(220, 57%, 21%) |
| OKLCH | oklch(29.7% 0.079 262.9) |
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 #172B54 | 13.90:1 | AAA | Lc -103.4 | Preferred for body text |
| Black text on #172B54 | 1.51:1 | Fails | Lc 0.0 | Not readable |
| #172B54 text on white | 13.90:1 | AAA | Lc 100.3 | Preferred for body text |
| #172B54 text on black | 1.51:1 | 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
#F1F6FE
oklch(97.2% 0.012 259.8)
-
Step 100
100
#E0EAFD
oklch(93.5% 0.028 263.4)
-
Step 200
200
#C7DAFC
oklch(88.5% 0.051 262.1)
-
Step 300
300
#A1C1FE
oklch(81% 0.094 263)
-
Step 400
400
#6E9EFD
oklch(70.7% 0.149 262.9)
-
Step 500
500
#4882FB
oklch(63.1% 0.191 262.9)
-
Step 600
600
#2C67EA
oklch(55.5% 0.208 263.1)
-
Step 700
700
#1F55CC
oklch(49.1% 0.193 262.9)
-
Step 800
800
#1B46A5
oklch(42.6% 0.161 263)
-
Step 900
900
#1C3C82
oklch(37.6% 0.124 263.2)
-
Step 950
950 (this color)
#172B54
oklch(29.7% 0.079 262.9)
#172B54 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) | #172F56 | 0.013 |
| Deuteranopia (no green cones) | #0C2A53 | 0.012 |
| Tritanopia (no blue cones) | #00343B | 0.064 |
| Achromatopsia (no color) | #2C2C2C | 0.079 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #172B54
#172B54
oklch(29.7% 0.079 262.9)
- #3C2A00
#3C2A00
oklch(29.8% 0.061 83.4)
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 #172B54, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine #042E60 ΔE 0.025
- Prussian Blue #1D3557 ΔE 0.034
- Space Cadet #2B2D42 ΔE 0.045
- Oxford Blue #1B263B ΔE 0.046
- Marine Blue #01386A ΔE 0.051
- Gunmetal #293241 ΔE 0.053
- Midnight Green #073B4C ΔE 0.058
- Dark Blue Grey #1F3B4D ΔE 0.059
Use #172B54 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.