#173F46
Closest named color: Dark Blue Grey (#1F3B4D). oklch(34.3% 0.046 210.8), rgb(23, 63, 70).
Aa
White text reads best on this color (11.43:1).
About this color
#173F46 is a dark, muted teal or cyan. In OKLCH its lightness is 34%, its chroma 0.046 and its hue 211°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Blue Grey (#1F3B4D), ΔE 0.022 away. White text reads best on it, at 11.43:1.
| Hue family | Teals and cyans |
| Lightness | dark (34%) |
| Chroma | muted (0.046) |
| Temperature | cool |
| Nearest name | Dark Blue Grey (#1F3B4D) |
| Black text | 1.83:1 |
| White text | 11.43:1 |
Values
| HEX | #173F46 |
| RGB | rgb(23, 63, 70) |
| HSL | hsl(189, 51%, 18%) |
| OKLCH | oklch(34.3% 0.046 210.8) |
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 #173F46 | 11.43:1 | AAA | Lc -99.9 | Preferred for body text |
| Black text on #173F46 | 1.83:1 | Fails | Lc 7.7 | Not readable |
| #173F46 text on white | 11.43:1 | AAA | Lc 96.2 | Preferred for body text |
| #173F46 text on black | 1.83:1 | 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
#E3ECEE
oklch(93.7% 0.01 212.5)
-
Step 200
200
#CCDDE0
oklch(88.6% 0.019 209.4)
-
Step 300
300
#A8C7CD
oklch(80.9% 0.034 210.7)
-
Step 400
400
#78AAB4
oklch(70.6% 0.055 211.4)
-
Step 500
500
#5295A2
oklch(63.1% 0.071 211.6)
-
Step 600
600
#337F8D
oklch(55.5% 0.077 211.7)
-
Step 700
700
#256B77
oklch(49% 0.071 211)
-
Step 800
800
#215861
oklch(42.8% 0.059 209.9)
-
Step 900
900 (this color)
#173F46
oklch(34.3% 0.046 210.8)
-
Step 950
950
#142A2E
oklch(26.9% 0.029 210.5)
#173F46 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) | #393D46 | 0.043 |
| Deuteranopia (no green cones) | #323746 | 0.040 |
| Tritanopia (no blue cones) | #004241 | 0.020 |
| Achromatopsia (no color) | #3A3A3A | 0.046 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #173F46
#173F46
oklch(34.3% 0.046 210.8)
- #4E2F2A
#4E2F2A
oklch(34.2% 0.047 29.7)
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 #173F46, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Blue Grey #1F3B4D ΔE 0.022
- Midnight Green #073B4C ΔE 0.023
- Charcoal #264653 ΔE 0.035
- Onyx #343A40 ΔE 0.036
- Gunmetal #293241 ΔE 0.044
- Dark Teal #014D4E ΔE 0.045
- Dark Grey Blue #29465B ΔE 0.046
- Charcoal Grey #3C4142 ΔE 0.048
Use #173F46 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.