#173239
Closest named color: Gunmetal (#293241). oklch(29.9% 0.035 216.7), rgb(23, 50, 57).
Aa
White text reads best on this color (13.53:1).
About this color
#173239 is a dark, muted teal or cyan. In OKLCH its lightness is 30%, its chroma 0.035 and its hue 217°. Its hue sits on the cool side of the wheel. The nearest named color is Gunmetal (#293241), ΔE 0.030 away. White text reads best on it, at 13.53:1.
| Hue family | Teals and cyans |
| Lightness | dark (30%) |
| Chroma | muted (0.035) |
| Temperature | cool |
| Nearest name | Gunmetal (#293241) |
| Black text | 1.55:1 |
| White text | 13.53:1 |
Values
| HEX | #173239 |
| RGB | rgb(23, 50, 57) |
| HSL | hsl(192, 43%, 16%) |
| OKLCH | oklch(29.9% 0.035 216.7) |
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 #173239 | 13.53:1 | AAA | Lc -103.1 | Preferred for body text |
| Black text on #173239 | 1.55:1 | Fails | Lc 0.0 | Not readable |
| #173239 text on white | 13.53:1 | AAA | Lc 99.9 | Preferred for body text |
| #173239 text on black | 1.55:1 | 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
#F1F6F8
oklch(97% 0.006 223.5)
-
Step 100
100
#E1ECEF
oklch(93.6% 0.012 215.8)
-
Step 200
200
#C9DDE3
oklch(88.4% 0.023 217.7)
-
Step 300
300
#A3C8D2
oklch(80.9% 0.042 216)
-
Step 400
400
#6FABBC
oklch(70.6% 0.067 217.6)
-
Step 500
500
#4396AB
oklch(63% 0.086 217)
-
Step 600
600
#1A8096
oklch(55.5% 0.092 216.7)
-
Step 700
700
#066C80
oklch(49% 0.086 216.8)
-
Step 800
800
#0E5868
oklch(42.6% 0.071 216.8)
-
Step 900
900
#174955
oklch(37.8% 0.056 216.7)
-
Step 950
950 (this color)
#173239
oklch(29.9% 0.035 216.7)
#173239 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) | #2D3039 | 0.031 |
| Deuteranopia (no green cones) | #282D39 | 0.027 |
| Tritanopia (no blue cones) | #033534 | 0.022 |
| Achromatopsia (no color) | #2E2E2E | 0.035 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #173239
#173239
oklch(29.9% 0.035 216.7)
- #3D2721
#3D2721
oklch(29.8% 0.035 35.9)
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 #173239, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Gunmetal #293241 ΔE 0.030
- Space Cadet #2B2D42 ΔE 0.039
- Midnight Green #073B4C ΔE 0.039
- Oxford Blue #1B263B ΔE 0.043
- Dark Blue Grey #1F3B4D ΔE 0.044
- Jet #212529 ΔE 0.046
- Dark #1B2431 ΔE 0.047
- Onyx #343A40 ΔE 0.052
Use #173239 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.