#174E5B
Closest named color: Deep Teal (#00555A). oklch(39.5% 0.06 216.7), rgb(23, 78, 91).
Aa
White text reads best on this color (9.22:1).
About this color
#174E5B is a dark, muted teal or cyan. In OKLCH its lightness is 39%, its chroma 0.060 and its hue 217°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Teal (#00555A), ΔE 0.024 away. White text reads best on it, at 9.22:1.
| Hue family | Teals and cyans |
| Lightness | dark (39%) |
| Chroma | muted (0.060) |
| Temperature | cool |
| Nearest name | Deep Teal (#00555A) |
| Black text | 2.27:1 |
| White text | 9.22:1 |
Values
| HEX | #174E5B |
| RGB | rgb(23, 78, 91) |
| HSL | hsl(191, 60%, 22%) |
| OKLCH | oklch(39.5% 0.06 216.7) |
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 #174E5B | 9.22:1 | AAA | Lc -95.4 | Preferred for body text |
| Black text on #174E5B | 2.27:1 | Fails | Lc 13.0 | Not readable |
| #174E5B text on white | 9.22:1 | AAA | Lc 91.0 | Preferred for body text |
| #174E5B text on black | 2.27:1 | Fails | Lc -11.3 | 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
#F1F6F8
oklch(97% 0.006 223.5)
-
Step 100
100
#E1ECEF
oklch(93.6% 0.012 215.8)
-
Step 200
200
#C8DEE4
oklch(88.6% 0.025 215.9)
-
Step 300
300
#A1C8D4
oklch(80.9% 0.045 218.5)
-
Step 400
400
#6AACBE
oklch(70.7% 0.072 217.1)
-
Step 500
500
#3B97AD
oklch(63.1% 0.091 216.5)
-
Step 600
600
#008199
oklch(55.6% 0.099 216.9)
-
Step 700
700
#006C81
oklch(49% 0.088 217.4)
-
Step 800
800
#00596A
oklch(42.8% 0.076 216.6)
-
Step 900
900 (this color)
#174E5B
oklch(39.5% 0.06 216.7)
-
Step 950
950
#0D2B32
oklch(27% 0.037 215.6)
#174E5B 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) | #454B5C | 0.052 |
| Deuteranopia (no green cones) | #3C445B | 0.048 |
| Tritanopia (no blue cones) | #005352 | 0.028 |
| Achromatopsia (no color) | #474747 | 0.060 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #174E5B
#174E5B
oklch(39.5% 0.06 216.7)
- #623A2F
#623A2F
oklch(39.4% 0.06 36.2)
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 #174E5B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Teal #00555A ΔE 0.024
- Dark Teal #014D4E ΔE 0.026
- Charcoal #264653 ΔE 0.026
- Dark Grey Blue #29465B ΔE 0.029
- Dark Slate Gray #2F4F4F ΔE 0.029
- Dark Blue Green #005249 ΔE 0.040
- Petrol #005F6A ΔE 0.053
- Charcoal Grey #3C4142 ΔE 0.058
Use #174E5B 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.