#173445
Closest named color: Gunmetal (#293241). oklch(31.1% 0.046 236.6), rgb(23, 52, 69).
Aa
White text reads best on this color (13.01:1).
About this color
#173445 is a dark, muted blue. In OKLCH its lightness is 31%, its chroma 0.046 and its hue 237°. Its hue sits on the cool side of the wheel. The nearest named color is Gunmetal (#293241), ΔE 0.023 away. White text reads best on it, at 13.01:1.
| Hue family | Blues |
| Lightness | dark (31%) |
| Chroma | muted (0.046) |
| Temperature | cool |
| Nearest name | Gunmetal (#293241) |
| Black text | 1.61:1 |
| White text | 13.01:1 |
Values
| HEX | #173445 |
| RGB | rgb(23, 52, 69) |
| HSL | hsl(202, 50%, 18%) |
| OKLCH | oklch(31.1% 0.046 236.6) |
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 #173445 | 13.01:1 | AAA | Lc -102.4 | Preferred for body text |
| Black text on #173445 | 1.61:1 | Fails | Lc 0.0 | Not readable |
| #173445 text on white | 13.01:1 | AAA | Lc 99.1 | Preferred for body text |
| #173445 text on black | 1.61:1 | 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
#E0ECF3
oklch(93.6% 0.016 233)
-
Step 200
200
#C7DDEB
oklch(88.6% 0.03 235.7)
-
Step 300
300
#A0C7E0
oklch(81% 0.055 236.5)
-
Step 400
400
#69A9D0
oklch(70.7% 0.087 236.6)
-
Step 500
500
#3993C4
oklch(63.1% 0.112 236.4)
-
Step 600
600
#007CB0
oklch(55.5% 0.121 236.7)
-
Step 700
700
#006895
oklch(49% 0.107 237)
-
Step 800
800
#00557B
oklch(42.6% 0.093 237.2)
-
Step 900
900
#0F4763
oklch(37.7% 0.073 235.9)
-
Step 950
950 (this color)
#173445
oklch(31.1% 0.046 236.6)
#173445 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) | #2C3446 | 0.028 |
| Deuteranopia (no green cones) | #262F45 | 0.024 |
| Tritanopia (no blue cones) | #00383A | 0.033 |
| Achromatopsia (no color) | #313131 | 0.046 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #173445
#173445
oklch(31.1% 0.046 236.6)
- #422A18
#422A18
oklch(31% 0.046 56.9)
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 #173445, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Gunmetal #293241 ΔE 0.023
- Midnight Green #073B4C ΔE 0.024
- Dark Blue Grey #1F3B4D ΔE 0.028
- Space Cadet #2B2D42 ΔE 0.033
- Prussian Blue #1D3557 ΔE 0.034
- Oxford Blue #1B263B ΔE 0.046
- Onyx #343A40 ΔE 0.048
- Dark #1B2431 ΔE 0.058
Use #173445 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.