#173B46
Closest named color: Midnight Green (#073B4C). oklch(33.1% 0.045 220.8), rgb(23, 59, 70).
Aa
White text reads best on this color (11.99:1).
About this color
#173B46 is a dark, muted teal or cyan. In OKLCH its lightness is 33%, its chroma 0.045 and its hue 221°. Its hue sits on the cool side of the wheel. The nearest named color is Midnight Green (#073B4C), ΔE 0.014 away. White text reads best on it, at 11.99:1.
| Hue family | Teals and cyans |
| Lightness | dark (33%) |
| Chroma | muted (0.045) |
| Temperature | cool |
| Nearest name | Midnight Green (#073B4C) |
| Black text | 1.75:1 |
| White text | 11.99:1 |
Values
| HEX | #173B46 |
| RGB | rgb(23, 59, 70) |
| HSL | hsl(194, 51%, 18%) |
| OKLCH | oklch(33.1% 0.045 220.8) |
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 #173B46 | 11.99:1 | AAA | Lc -100.9 | Preferred for body text |
| Black text on #173B46 | 1.75:1 | Fails | Lc 0.0 | Not readable |
| #173B46 text on white | 11.99:1 | AAA | Lc 97.3 | Preferred for body text |
| #173B46 text on black | 1.75:1 | 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 900.
-
Step 50
50
#F2F6F8
oklch(97.1% 0.005 228.8)
-
Step 100
100
#E3EBEE
oklch(93.5% 0.009 222.1)
-
Step 200
200
#CCDCE2
oklch(88.4% 0.019 222.2)
-
Step 300
300
#AAC6D0
oklch(80.9% 0.033 221.4)
-
Step 400
400
#7BA9B9
oklch(70.7% 0.054 221.4)
-
Step 500
500
#5793A7
oklch(63% 0.069 221.4)
-
Step 600
600
#397D92
oklch(55.5% 0.075 221)
-
Step 700
700
#2B6A7D
oklch(49.2% 0.07 220.9)
-
Step 800
800
#255665
oklch(42.6% 0.058 220.8)
-
Step 900
900 (this color)
#173B46
oklch(33.1% 0.045 220.8)
-
Step 950
950
#162A30
oklch(27.1% 0.028 219)
#173B46 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) | #343947 | 0.037 |
| Deuteranopia (no green cones) | #2E3446 | 0.035 |
| Tritanopia (no blue cones) | #003F3E | 0.027 |
| Achromatopsia (no color) | #363636 | 0.045 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #173B46
#173B46
oklch(33.1% 0.045 220.8)
- #4A2E23
#4A2E23
oklch(33.2% 0.046 42.2)
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 #173B46, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Midnight Green #073B4C ΔE 0.014
- Dark Blue Grey #1F3B4D ΔE 0.016
- Gunmetal #293241 ΔE 0.033
- Onyx #343A40 ΔE 0.037
- Prussian Blue #1D3557 ΔE 0.042
- Charcoal #264653 ΔE 0.044
- Space Cadet #2B2D42 ΔE 0.049
- Dark Grey Blue #29465B ΔE 0.053
Use #173B46 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.