#172F38
Closest named color: Gunmetal (#293241). oklch(29% 0.034 224.4), rgb(23, 47, 56).
Aa
White text reads best on this color (13.99:1).
About this color
#172F38 is a dark, muted teal or cyan. In OKLCH its lightness is 29%, its chroma 0.034 and its hue 224°. Its hue sits on the cool side of the wheel. The nearest named color is Gunmetal (#293241), ΔE 0.033 away. White text reads best on it, at 13.99:1.
| Hue family | Teals and cyans |
| Lightness | dark (29%) |
| Chroma | muted (0.034) |
| Temperature | cool |
| Nearest name | Gunmetal (#293241) |
| Black text | 1.50:1 |
| White text | 13.99:1 |
Values
| HEX | #172F38 |
| RGB | rgb(23, 47, 56) |
| HSL | hsl(196, 42%, 15%) |
| OKLCH | oklch(29% 0.034 224.4) |
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 #172F38 | 13.99:1 | AAA | Lc -103.6 | Preferred for body text |
| Black text on #172F38 | 1.50:1 | Fails | Lc 0.0 | Not readable |
| #172F38 text on white | 13.99:1 | AAA | Lc 100.6 | Preferred for body text |
| #172F38 text on black | 1.50:1 | 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
#F2F6F8
oklch(97.1% 0.005 228.8)
-
Step 100
100
#E2ECF0
oklch(93.7% 0.012 223.5)
-
Step 200
200
#CADDE4
oklch(88.5% 0.023 221.8)
-
Step 300
300
#A6C7D4
oklch(81% 0.04 223.7)
-
Step 400
400
#73AABF
oklch(70.7% 0.065 223.9)
-
Step 500
500
#4B94AF
oklch(63% 0.083 224.7)
-
Step 600
600
#297E9A
oklch(55.5% 0.09 224.2)
-
Step 700
700
#1A6A84
oklch(49% 0.084 224.9)
-
Step 800
800
#19576B
oklch(42.7% 0.069 223.8)
-
Step 900
900
#1C4857
oklch(37.8% 0.054 223.5)
-
Step 950
950 (this color)
#172F38
oklch(29% 0.034 224.4)
#172F38 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) | #2A2E38 | 0.027 |
| Deuteranopia (no green cones) | #252A38 | 0.025 |
| Tritanopia (no blue cones) | #053232 | 0.023 |
| Achromatopsia (no color) | #2C2C2C | 0.034 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #172F38
#172F38
oklch(29% 0.034 224.4)
- #3A261D
#3A261D
oklch(29% 0.034 45.1)
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 #172F38, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Gunmetal #293241 ΔE 0.033
- Oxford Blue #1B263B ΔE 0.033
- Space Cadet #2B2D42 ΔE 0.037
- Dark #1B2431 ΔE 0.037
- Jet #212529 ΔE 0.038
- Midnight Green #073B4C ΔE 0.046
- Dark Blue Grey #1F3B4D ΔE 0.051
- Prussian Blue #1D3557 ΔE 0.057
Use #172F38 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.