#166558
Closest named color: Dark Green Blue (#1F6357). oklch(45.7% 0.076 178.9), rgb(22, 101, 88).
Aa
White text reads best on this color (6.91:1).
About this color
#166558 is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 46%, its chroma 0.076 and its hue 179°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Green Blue (#1F6357), ΔE 0.007 away. White text reads best on it, at 6.91:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (46%) |
| Chroma | moderately saturated (0.076) |
| Temperature | cool |
| Nearest name | Dark Green Blue (#1F6357) |
| Black text | 3.03:1 |
| White text | 6.91:1 |
Values
| HEX | #166558 |
| RGB | rgb(22, 101, 88) |
| HSL | hsl(170, 64%, 24%) |
| OKLCH | oklch(45.7% 0.076 178.9) |
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 #166558 | 6.91:1 | AA | Lc -88.6 | Fine for body text |
| Black text on #166558 | 3.03:1 | AA large text | Lc 20.5 | Dividers and decoration only |
| #166558 text on white | 6.91:1 | AA | Lc 83.6 | Fine for body text |
| #166558 text on black | 3.03:1 | AA large text | Lc -18.4 | Dividers and decoration only |
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 800.
-
Step 50
50
#F1F7F5
oklch(97.1% 0.007 174.4)
-
Step 100
100
#E1EDEA
oklch(93.6% 0.013 179.5)
-
Step 200
200
#C9DFD9
oklch(88.6% 0.025 177.6)
-
Step 300
300
#A2CBC1
oklch(81% 0.046 178.6)
-
Step 400
400
#6DB0A1
oklch(70.8% 0.072 178.3)
-
Step 500
500
#409B8A
oklch(63% 0.09 178.9)
-
Step 600
600
#0E8674
oklch(55.6% 0.099 178.6)
-
Step 700
700
#007162
oklch(49.1% 0.09 179.3)
-
Step 800
800 (this color)
#166558
oklch(45.7% 0.076 178.9)
-
Step 900
900
#144C42
oklch(37.8% 0.06 178.6)
-
Step 950
950
#0E2C27
oklch(26.9% 0.037 180.8)
#166558 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) | #605E57 | 0.080 |
| Deuteranopia (no green cones) | #565759 | 0.076 |
| Tritanopia (no blue cones) | #006761 | 0.014 |
| Achromatopsia (no color) | #5A5A5A | 0.077 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #166558
#166558
oklch(45.7% 0.076 178.9)
- #794456
#794456
oklch(45.6% 0.076 358.8)
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 #166558, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Green Blue #1F6357 ΔE 0.007
- Dark Aqua #05696B ΔE 0.029
- Petrol #005F6A ΔE 0.041
- Spruce #0A5F38 ΔE 0.050
- Dark Aquamarine #017371 ΔE 0.050
- Pine #2B5D34 ΔE 0.051
- Deep Turquoise #017374 ΔE 0.053
- Deep Teal #00555A ΔE 0.057
Use #166558 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.