#172C50
Closest named color: Marine (#042E60). oklch(29.6% 0.071 260.5), rgb(23, 44, 80).
Aa
White text reads best on this color (13.88:1).
About this color
#172C50 is a dark, moderately saturated blue. In OKLCH its lightness is 30%, its chroma 0.071 and its hue 260°. Its hue sits on the cool side of the wheel. The nearest named color is Marine (#042E60), ΔE 0.031 away. White text reads best on it, at 13.88:1.
| Hue family | Blues |
| Lightness | dark (30%) |
| Chroma | moderately saturated (0.071) |
| Temperature | cool |
| Nearest name | Marine (#042E60) |
| Black text | 1.51:1 |
| White text | 13.88:1 |
Values
| HEX | #172C50 |
| RGB | rgb(23, 44, 80) |
| HSL | hsl(218, 55%, 20%) |
| OKLCH | oklch(29.6% 0.071 260.5) |
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 #172C50 | 13.88:1 | AAA | Lc -103.4 | Preferred for body text |
| Black text on #172C50 | 1.51:1 | Fails | Lc 0.0 | Not readable |
| #172C50 text on white | 13.88:1 | AAA | Lc 100.3 | Preferred for body text |
| #172C50 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
#F1F6FD
oklch(97.1% 0.011 256.7)
-
Step 100
100
#E1EBFB
oklch(93.7% 0.024 259.8)
-
Step 200
200
#C8DAF9
oklch(88.5% 0.047 261.4)
-
Step 300
300
#A2C2F8
oklch(81% 0.084 260.7)
-
Step 400
400
#6FA0F4
oklch(70.7% 0.135 260.7)
-
Step 500
500
#4886F0
oklch(63.2% 0.172 260.4)
-
Step 600
600
#2A6CDE
oklch(55.5% 0.187 260.6)
-
Step 700
700
#1C5AC1
oklch(49.2% 0.173 260.3)
-
Step 800
800
#1A4A9C
oklch(42.7% 0.144 260.5)
-
Step 900
900
#1B3F7C
oklch(37.8% 0.112 260.3)
-
Step 950
950 (this color)
#172C50
oklch(29.6% 0.071 260.5)
#172C50 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) | #1C2F51 | 0.012 |
| Deuteranopia (no green cones) | #132A4F | 0.009 |
| Tritanopia (no blue cones) | #00343A | 0.058 |
| Achromatopsia (no color) | #2C2C2C | 0.071 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #172C50
#172C50
oklch(29.6% 0.071 260.5)
- #3D2900
#3D2900
oklch(29.7% 0.062 80.2)
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 #172C50, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine #042E60 ΔE 0.031
- Prussian Blue #1D3557 ΔE 0.032
- Space Cadet #2B2D42 ΔE 0.038
- Oxford Blue #1B263B ΔE 0.040
- Gunmetal #293241 ΔE 0.045
- Midnight Green #073B4C ΔE 0.052
- Dark Blue Grey #1F3B4D ΔE 0.054
- Marine Blue #01386A ΔE 0.054
Use #172C50 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.