#172C42
Closest named color: Oxford Blue (#1B263B). oklch(28.7% 0.049 250.9), rgb(23, 44, 66).
Aa
White text reads best on this color (14.23:1).
About this color
#172C42 is a dark, muted blue. In OKLCH its lightness is 29%, its chroma 0.049 and its hue 251°. Its hue sits on the cool side of the wheel. The nearest named color is Oxford Blue (#1B263B), ΔE 0.021 away. White text reads best on it, at 14.23:1.
| Hue family | Blues |
| Lightness | dark (29%) |
| Chroma | muted (0.049) |
| Temperature | cool |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.47:1 |
| White text | 14.23:1 |
Values
| HEX | #172C42 |
| RGB | rgb(23, 44, 66) |
| HSL | hsl(211, 48%, 17%) |
| OKLCH | oklch(28.7% 0.049 250.9) |
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 #172C42 | 14.23:1 | AAA | Lc -103.8 | Preferred for body text |
| Black text on #172C42 | 1.47:1 | Fails | Lc 0.0 | Not readable |
| #172C42 text on white | 14.23:1 | AAA | Lc 100.9 | Preferred for body text |
| #172C42 text on black | 1.47:1 | 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
#F2F6FB
oklch(97.2% 0.008 253.9)
-
Step 100
100
#E2EBF5
oklch(93.6% 0.017 250.8)
-
Step 200
200
#CADBEE
oklch(88.5% 0.032 251.1)
-
Step 300
300
#A5C4E5
oklch(80.9% 0.058 250.2)
-
Step 400
400
#74A5D9
oklch(70.8% 0.093 250.7)
-
Step 500
500
#4E8DCE
oklch(63% 0.118 250.9)
-
Step 600
600
#2F76BB
oklch(55.5% 0.128 250.8)
-
Step 700
700
#2263A2
oklch(49.1% 0.12 251.2)
-
Step 800
800
#1E5183
oklch(42.7% 0.099 251)
-
Step 900
900
#1F4369
oklch(37.6% 0.078 251.7)
-
Step 950
950 (this color)
#172C42
oklch(28.7% 0.049 250.9)
#172C42 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) | #232D43 | 0.017 |
| Deuteranopia (no green cones) | #1D2942 | 0.012 |
| Tritanopia (no blue cones) | #003134 | 0.041 |
| Achromatopsia (no color) | #2B2B2B | 0.049 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #172C42
#172C42
oklch(28.7% 0.049 250.9)
- #3A260C
#3A260C
oklch(28.7% 0.049 70.5)
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 #172C42, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Oxford Blue #1B263B ΔE 0.021
- Space Cadet #2B2D42 ΔE 0.030
- Gunmetal #293241 ΔE 0.035
- Dark #1B2431 ΔE 0.036
- Prussian Blue #1D3557 ΔE 0.045
- Jet #212529 ΔE 0.047
- Midnight Green #073B4C ΔE 0.049
- Dark Blue Grey #1F3B4D ΔE 0.053
Use #172C42 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.