#173145
Closest named color: Gunmetal (#293241). oklch(30.3% 0.049 243.6), rgb(23, 49, 69).
Aa
White text reads best on this color (13.44:1).
About this color
#173145 is a dark, muted blue. In OKLCH its lightness is 30%, its chroma 0.049 and its hue 244°. Its hue sits on the cool side of the wheel. The nearest named color is Gunmetal (#293241), ΔE 0.025 away. White text reads best on it, at 13.44:1.
| Hue family | Blues |
| Lightness | dark (30%) |
| Chroma | muted (0.049) |
| Temperature | cool |
| Nearest name | Gunmetal (#293241) |
| Black text | 1.56:1 |
| White text | 13.44:1 |
Values
| HEX | #173145 |
| RGB | rgb(23, 49, 69) |
| HSL | hsl(206, 50%, 18%) |
| OKLCH | oklch(30.3% 0.049 243.6) |
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 #173145 | 13.44:1 | AAA | Lc -102.9 | Preferred for body text |
| Black text on #173145 | 1.56:1 | Fails | Lc 0.0 | Not readable |
| #173145 text on white | 13.44:1 | AAA | Lc 99.8 | Preferred for body text |
| #173145 text on black | 1.56:1 | 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
#E1EBF4
oklch(93.5% 0.016 245.1)
-
Step 200
200
#C8DCED
oklch(88.5% 0.032 243.7)
-
Step 300
300
#A1C6E3
oklch(80.9% 0.057 242)
-
Step 400
400
#6DA7D6
oklch(70.7% 0.092 244.1)
-
Step 500
500
#4190CB
oklch(63% 0.118 243.9)
-
Step 600
600
#1879B8
oklch(55.5% 0.128 244.1)
-
Step 700
700
#04669E
oklch(49.1% 0.118 243.5)
-
Step 800
800
#0D5380
oklch(42.6% 0.098 243.9)
-
Step 900
900
#164567
oklch(37.6% 0.077 244.1)
-
Step 950
950 (this color)
#173145
oklch(30.3% 0.049 243.6)
#173145 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) | #283146 | 0.023 |
| Deuteranopia (no green cones) | #222D45 | 0.018 |
| Tritanopia (no blue cones) | #003638 | 0.038 |
| Achromatopsia (no color) | #2F2F2F | 0.049 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #173145
#173145
oklch(30.3% 0.049 243.6)
- #3F2913
#3F2913
oklch(30.2% 0.048 64.3)
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 #173145, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Gunmetal #293241 ΔE 0.025
- Space Cadet #2B2D42 ΔE 0.029
- Midnight Green #073B4C ΔE 0.033
- Prussian Blue #1D3557 ΔE 0.034
- Dark Blue Grey #1F3B4D ΔE 0.036
- Oxford Blue #1B263B ΔE 0.037
- Dark #1B2431 ΔE 0.050
- Marine #042E60 ΔE 0.053
Use #173145 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.