#172F44
Closest named color: Space Cadet (#2B2D42). oklch(29.6% 0.049 246.7), rgb(23, 47, 68).
Aa
White text reads best on this color (13.75:1).
About this color
#172F44 is a dark, muted blue. In OKLCH its lightness is 30%, its chroma 0.049 and its hue 247°. Its hue sits on the cool side of the wheel. The nearest named color is Space Cadet (#2B2D42), ΔE 0.028 away. White text reads best on it, at 13.75:1.
| Hue family | Blues |
| Lightness | dark (30%) |
| Chroma | muted (0.049) |
| Temperature | cool |
| Nearest name | Space Cadet (#2B2D42) |
| Black text | 1.52:1 |
| White text | 13.75:1 |
Values
| HEX | #172F44 |
| RGB | rgb(23, 47, 68) |
| HSL | hsl(208, 49%, 18%) |
| OKLCH | oklch(29.6% 0.049 246.7) |
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 #172F44 | 13.75:1 | AAA | Lc -103.3 | Preferred for body text |
| Black text on #172F44 | 1.52:1 | Fails | Lc 0.0 | Not readable |
| #172F44 text on white | 13.75:1 | AAA | Lc 100.2 | Preferred for body text |
| #172F44 text on black | 1.52:1 | 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
#F1F6FA
oklch(97.1% 0.008 241.7)
-
Step 100
100
#E1EBF5
oklch(93.5% 0.017 248)
-
Step 200
200
#C9DCEE
oklch(88.6% 0.032 246.7)
-
Step 300
300
#A3C5E5
oklch(80.9% 0.058 247)
-
Step 400
400
#70A6D7
oklch(70.7% 0.092 246.9)
-
Step 500
500
#478FCD
oklch(63.1% 0.118 247)
-
Step 600
600
#2378BA
oklch(55.6% 0.129 246.9)
-
Step 700
700
#1465A0
oklch(49.2% 0.119 246.6)
-
Step 800
800
#155282
oklch(42.6% 0.1 247.3)
-
Step 900
900
#1A4568
oklch(37.8% 0.076 246.4)
-
Step 950
950 (this color)
#172F44
oklch(29.6% 0.049 246.7)
#172F44 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) | #263045 | 0.021 |
| Deuteranopia (no green cones) | #202B44 | 0.017 |
| Tritanopia (no blue cones) | #003436 | 0.040 |
| Achromatopsia (no color) | #2D2D2D | 0.049 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #172F44
#172F44
oklch(29.6% 0.049 246.7)
- #3D2810
#3D2810
oklch(29.7% 0.048 67.6)
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 #172F44, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Space Cadet #2B2D42 ΔE 0.028
- Gunmetal #293241 ΔE 0.028
- Oxford Blue #1B263B ΔE 0.031
- Prussian Blue #1D3557 ΔE 0.038
- Midnight Green #073B4C ΔE 0.039
- Dark Blue Grey #1F3B4D ΔE 0.043
- Dark #1B2431 ΔE 0.044
- Jet #212529 ΔE 0.052
Use #172F44 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.