#173549
Closest named color: Midnight Green (#073B4C). oklch(31.6% 0.051 240.2), rgb(23, 53, 73).
Aa
White text reads best on this color (12.79:1).
About this color
#173549 is a dark, muted blue. In OKLCH its lightness is 32%, its chroma 0.051 and its hue 240°. Its hue sits on the cool side of the wheel. The nearest named color is Midnight Green (#073B4C), ΔE 0.021 away. White text reads best on it, at 12.79:1.
| Hue family | Blues |
| Lightness | dark (32%) |
| Chroma | muted (0.051) |
| Temperature | cool |
| Nearest name | Midnight Green (#073B4C) |
| Black text | 1.64:1 |
| White text | 12.79:1 |
Values
| HEX | #173549 |
| RGB | rgb(23, 53, 73) |
| HSL | hsl(204, 52%, 19%) |
| OKLCH | oklch(31.6% 0.051 240.2) |
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 #173549 | 12.79:1 | AAA | Lc -102.1 | Preferred for body text |
| Black text on #173549 | 1.64:1 | Fails | Lc 0.0 | Not readable |
| #173549 text on white | 12.79:1 | AAA | Lc 98.8 | Preferred for body text |
| #173549 text on black | 1.64:1 | 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
#E0ECF5
oklch(93.7% 0.018 240)
-
Step 200
200
#C6DDED
oklch(88.5% 0.033 238.2)
-
Step 300
300
#9EC6E4
oklch(80.8% 0.06 240.9)
-
Step 400
400
#66A9D7
oklch(70.8% 0.096 240)
-
Step 500
500
#3492CC
oklch(63.1% 0.123 240.3)
-
Step 600
600
#007BB6
oklch(55.6% 0.128 240.2)
-
Step 700
700
#00679A
oklch(49.1% 0.113 240.5)
-
Step 800
800
#00547F
oklch(42.6% 0.099 240.7)
-
Step 900
900
#0C4668
oklch(37.7% 0.081 240.8)
-
Step 950
950 (this color)
#173549
oklch(31.6% 0.051 240.2)
#173549 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) | #2C354A | 0.027 |
| Deuteranopia (no green cones) | #253049 | 0.022 |
| Tritanopia (no blue cones) | #003A3C | 0.037 |
| Achromatopsia (no color) | #323232 | 0.051 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #173549
#173549
oklch(31.6% 0.051 240.2)
- #452B15
#452B15
oklch(31.6% 0.052 59.5)
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 #173549, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Midnight Green #073B4C ΔE 0.021
- Dark Blue Grey #1F3B4D ΔE 0.023
- Gunmetal #293241 ΔE 0.025
- Prussian Blue #1D3557 ΔE 0.027
- Space Cadet #2B2D42 ΔE 0.034
- Onyx #343A40 ΔE 0.048
- Oxford Blue #1B263B ΔE 0.051
- Marine #042E60 ΔE 0.053
Use #173549 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.