#173641
Closest named color: Midnight Green (#073B4C). oklch(31.4% 0.042 223.8), rgb(23, 54, 65).
Aa
White text reads best on this color (12.80:1).
About this color
#173641 is a dark, muted teal or cyan. In OKLCH its lightness is 31%, its chroma 0.042 and its hue 224°. 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 12.80:1.
| Hue family | Teals and cyans |
| Lightness | dark (31%) |
| Chroma | muted (0.042) |
| Temperature | cool |
| Nearest name | Midnight Green (#073B4C) |
| Black text | 1.64:1 |
| White text | 12.80:1 |
Values
| HEX | #173641 |
| RGB | rgb(23, 54, 65) |
| HSL | hsl(196, 48%, 17%) |
| OKLCH | oklch(31.4% 0.042 223.8) |
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 #173641 | 12.80:1 | AAA | Lc -102.1 | Preferred for body text |
| Black text on #173641 | 1.64:1 | Fails | Lc 0.0 | Not readable |
| #173641 text on white | 12.80:1 | AAA | Lc 98.8 | Preferred for body text |
| #173641 text on black | 1.64:1 | 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
#F1F6F9
oklch(97% 0.007 233.6)
-
Step 100
100
#E0ECF1
oklch(93.6% 0.015 224.5)
-
Step 200
200
#C7DEE7
oklch(88.6% 0.028 223.3)
-
Step 300
300
#9FC8D8
oklch(80.9% 0.049 223.7)
-
Step 400
400
#67ACC5
oklch(70.8% 0.079 223.3)
-
Step 500
500
#3496B6
oklch(63% 0.101 223.8)
-
Step 600
600
#0080A0
oklch(55.7% 0.104 223.4)
-
Step 700
700
#006B87
oklch(49% 0.092 224)
-
Step 800
800
#00586F
oklch(42.7% 0.08 223.4)
-
Step 900
900
#0C495B
oklch(37.8% 0.065 223.2)
-
Step 950
950 (this color)
#173641
oklch(31.4% 0.042 223.8)
#173641 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) | #303542 | 0.033 |
| Deuteranopia (no green cones) | #2A3041 | 0.030 |
| Tritanopia (no blue cones) | #003939 | 0.026 |
| Achromatopsia (no color) | #323232 | 0.042 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #173641
#173641
oklch(31.4% 0.042 223.8)
- #432A20
#432A20
oklch(31.3% 0.041 42.6)
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 #173641, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Midnight Green #073B4C ΔE 0.023
- Gunmetal #293241 ΔE 0.025
- Dark Blue Grey #1F3B4D ΔE 0.027
- Space Cadet #2B2D42 ΔE 0.039
- Prussian Blue #1D3557 ΔE 0.042
- Onyx #343A40 ΔE 0.043
- Oxford Blue #1B263B ΔE 0.053
- Charcoal #264653 ΔE 0.061
Use #173641 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.