#172F41
Closest named color: Gunmetal (#293241). oklch(29.5% 0.045 242.7), rgb(23, 47, 65).
Aa
White text reads best on this color (13.82:1).
About this color
#172F41 is a dark, muted blue. In OKLCH its lightness is 29%, its chroma 0.045 and its hue 243°. Its hue sits on the cool side of the wheel. The nearest named color is Gunmetal (#293241), ΔE 0.028 away. White text reads best on it, at 13.82:1.
| Hue family | Blues |
| Lightness | dark (29%) |
| Chroma | muted (0.045) |
| Temperature | cool |
| Nearest name | Gunmetal (#293241) |
| Black text | 1.51:1 |
| White text | 13.82:1 |
Values
| HEX | #172F41 |
| RGB | rgb(23, 47, 65) |
| HSL | hsl(206, 48%, 17%) |
| OKLCH | oklch(29.5% 0.045 242.7) |
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 #172F41 | 13.82:1 | AAA | Lc -103.4 | Preferred for body text |
| Black text on #172F41 | 1.51:1 | Fails | Lc 0.0 | Not readable |
| #172F41 text on white | 13.82:1 | AAA | Lc 100.3 | Preferred for body text |
| #172F41 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
#F2F6FA
oklch(97.1% 0.007 247.9)
-
Step 100
100
#E1EBF3
oklch(93.5% 0.015 241.8)
-
Step 200
200
#C9DCEB
oklch(88.5% 0.029 241.6)
-
Step 300
300
#A4C5E1
oklch(80.9% 0.053 244.1)
-
Step 400
400
#71A7D1
oklch(70.7% 0.084 242.8)
-
Step 500
500
#4890C5
oklch(63% 0.108 243)
-
Step 600
600
#257AB2
oklch(55.7% 0.117 242.6)
-
Step 700
700
#156699
oklch(49% 0.109 242.9)
-
Step 800
800
#16547C
oklch(42.8% 0.09 242.2)
-
Step 900
900
#1A4564
oklch(37.6% 0.071 243.3)
-
Step 950
950 (this color)
#172F41
oklch(29.5% 0.045 242.7)
#172F41 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) | #272F42 | 0.022 |
| Deuteranopia (no green cones) | #212B41 | 0.018 |
| Tritanopia (no blue cones) | #003335 | 0.036 |
| Achromatopsia (no color) | #2D2D2D | 0.045 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #172F41
#172F41
oklch(29.5% 0.045 242.7)
- #3C2714
#3C2714
oklch(29.4% 0.044 61.9)
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 #172F41, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Gunmetal #293241 ΔE 0.028
- Space Cadet #2B2D42 ΔE 0.029
- Oxford Blue #1B263B ΔE 0.030
- Midnight Green #073B4C ΔE 0.040
- Dark #1B2431 ΔE 0.041
- Prussian Blue #1D3557 ΔE 0.043
- Dark Blue Grey #1F3B4D ΔE 0.044
- Jet #212529 ΔE 0.048
Use #172F41 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.