#173237
Closest named color: Gunmetal (#293241). oklch(29.8% 0.034 210.9), rgb(23, 50, 55).
Aa
White text reads best on this color (13.56:1).
About this color
#173237 is a dark, muted teal or cyan. In OKLCH its lightness is 30%, its chroma 0.034 and its hue 211°. Its hue sits on the cool side of the wheel. The nearest named color is Gunmetal (#293241), ΔE 0.032 away. White text reads best on it, at 13.56:1.
| Hue family | Teals and cyans |
| Lightness | dark (30%) |
| Chroma | muted (0.034) |
| Temperature | cool |
| Nearest name | Gunmetal (#293241) |
| Black text | 1.54:1 |
| White text | 13.56:1 |
Values
| HEX | #173237 |
| RGB | rgb(23, 50, 55) |
| HSL | hsl(189, 41%, 15%) |
| OKLCH | oklch(29.8% 0.034 210.9) |
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 #173237 | 13.56:1 | AAA | Lc -103.1 | Preferred for body text |
| Black text on #173237 | 1.54:1 | Fails | Lc 0.0 | Not readable |
| #173237 text on white | 13.56:1 | AAA | Lc 100.0 | Preferred for body text |
| #173237 text on black | 1.54:1 | 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
#F2F6F7
oklch(97% 0.004 214.3)
-
Step 100
100
#E2ECEE
oklch(93.6% 0.011 211)
-
Step 200
200
#C9DDE1
oklch(88.4% 0.022 211)
-
Step 300
300
#A3C8CF
oklch(80.8% 0.041 210.4)
-
Step 400
400
#6FACB7
oklch(70.7% 0.065 210.1)
-
Step 500
500
#4497A6
oklch(63.1% 0.083 211.1)
-
Step 600
600
#1B8191
oklch(55.6% 0.09 211)
-
Step 700
700
#086D7B
oklch(49.1% 0.083 210.5)
-
Step 800
800
#0F5964
oklch(42.7% 0.069 210.3)
-
Step 900
900
#184952
oklch(37.7% 0.054 211.9)
-
Step 950
950 (this color)
#173237
oklch(29.8% 0.034 210.9)
#173237 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) | #2E3037 | 0.033 |
| Deuteranopia (no green cones) | #292C37 | 0.031 |
| Tritanopia (no blue cones) | #053433 | 0.019 |
| Achromatopsia (no color) | #2E2E2E | 0.034 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #173237
#173237
oklch(29.8% 0.034 210.9)
- #3D2723
#3D2723
oklch(29.9% 0.034 30.6)
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 #173237, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Gunmetal #293241 ΔE 0.032
- Midnight Green #073B4C ΔE 0.041
- Space Cadet #2B2D42 ΔE 0.041
- Oxford Blue #1B263B ΔE 0.045
- Jet #212529 ΔE 0.045
- Dark Blue Grey #1F3B4D ΔE 0.046
- Dark #1B2431 ΔE 0.047
- Onyx #343A40 ΔE 0.053
Use #173237 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.