#173C41
Closest named color: Midnight Green (#073B4C). oklch(33.2% 0.043 207.2), rgb(23, 60, 65).
Aa
White text reads best on this color (11.93:1).
About this color
#173C41 is a dark, muted teal or cyan. In OKLCH its lightness is 33%, its chroma 0.043 and its hue 207°. Its hue sits on the cool side of the wheel. The nearest named color is Midnight Green (#073B4C), ΔE 0.023 away. White text reads best on it, at 11.93:1.
| Hue family | Teals and cyans |
| Lightness | dark (33%) |
| Chroma | muted (0.043) |
| Temperature | cool |
| Nearest name | Midnight Green (#073B4C) |
| Black text | 1.75:1 |
| White text | 11.93:1 |
Values
| HEX | #173C41 |
| RGB | rgb(23, 60, 65) |
| HSL | hsl(187, 48%, 17%) |
| OKLCH | oklch(33.2% 0.043 207.2) |
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 #173C41 | 11.93:1 | AAA | Lc -100.8 | Preferred for body text |
| Black text on #173C41 | 1.75:1 | Fails | Lc 0.0 | Not readable |
| #173C41 text on white | 11.93:1 | AAA | Lc 97.2 | Preferred for body text |
| #173C41 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
#F2F6F7
oklch(97% 0.004 214.3)
-
Step 100
100
#E3ECED
oklch(93.7% 0.01 204.9)
-
Step 200
200
#CCDDDF
oklch(88.5% 0.018 205.3)
-
Step 300
300
#AAC7CB
oklch(80.9% 0.032 206.7)
-
Step 400
400
#7BAAB1
oklch(70.7% 0.051 207.6)
-
Step 500
500
#57959E
oklch(63.1% 0.065 207.6)
-
Step 600
600
#397F89
oklch(55.6% 0.071 207.9)
-
Step 700
700
#2B6B74
oklch(49% 0.066 207.9)
-
Step 800
800
#25575E
oklch(42.6% 0.055 207.6)
-
Step 900
900 (this color)
#173C41
oklch(33.2% 0.043 207.2)
-
Step 950
950
#162A2D
oklch(26.9% 0.026 207.9)
#173C41 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) | #373A41 | 0.041 |
| Deuteranopia (no green cones) | #303541 | 0.037 |
| Tritanopia (no blue cones) | #003F3D | 0.020 |
| Achromatopsia (no color) | #373737 | 0.043 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #173C41
#173C41
oklch(33.2% 0.043 207.2)
- #4A2D2A
#4A2D2A
oklch(33.2% 0.044 26.1)
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 #173C41, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Midnight Green #073B4C ΔE 0.023
- Dark Blue Grey #1F3B4D ΔE 0.025
- Onyx #343A40 ΔE 0.036
- Gunmetal #293241 ΔE 0.038
- Charcoal #264653 ΔE 0.046
- Prussian Blue #1D3557 ΔE 0.052
- Charcoal Grey #3C4142 ΔE 0.053
- Space Cadet #2B2D42 ΔE 0.055
Use #173C41 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.