#166B4B
Closest named color: Dark Green Blue (#1F6357). oklch(47.1% 0.094 162.6), rgb(22, 107, 75).
Aa
White text reads best on this color (6.48:1).
About this color
#166B4B is a medium-dark, moderately saturated green. In OKLCH its lightness is 47%, its chroma 0.094 and its hue 163°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Green Blue (#1F6357), ΔE 0.037 away. White text reads best on it, at 6.48:1.
| Hue family | Greens |
| Lightness | medium-dark (47%) |
| Chroma | moderately saturated (0.094) |
| Temperature | in between |
| Nearest name | Dark Green Blue (#1F6357) |
| Black text | 3.23:1 |
| White text | 6.48:1 |
Values
| HEX | #166B4B |
| RGB | rgb(22, 107, 75) |
| HSL | hsl(157, 66%, 25%) |
| OKLCH | oklch(47.1% 0.094 162.6) |
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 #166B4B | 6.48:1 | AA | Lc -86.9 | Fine for body text |
| Black text on #166B4B | 3.23:1 | AA large text | Lc 22.3 | Dividers and decoration only |
| #166B4B text on white | 6.48:1 | AA | Lc 81.8 | Fine for body text |
| #166B4B text on black | 3.23:1 | AA large text | Lc -20.1 | 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 700.
-
Step 50
50
#F2F7F4
oklch(97.2% 0.007 160.1)
-
Step 100
100
#E3EDE7
oklch(93.7% 0.013 159.9)
-
Step 200
200
#CBDFD4
oklch(88.6% 0.026 161.9)
-
Step 300
300
#A7CAB8
oklch(80.8% 0.045 162.9)
-
Step 400
400
#76AF93
oklch(70.6% 0.073 162.5)
-
Step 500
500
#4F9B79
oklch(63.1% 0.093 162.8)
-
Step 600
600
#2E8662
oklch(55.8% 0.101 162.6)
-
Step 700
700 (this color)
#166B4B
oklch(47.1% 0.094 162.6)
-
Step 800
800
#1D5C42
oklch(42.7% 0.078 162.4)
-
Step 900
900
#1F4C38
oklch(37.8% 0.061 162.2)
-
Step 950
950
#132C21
oklch(26.9% 0.038 163.5)
#166B4B 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) | #696349 | 0.090 |
| Deuteranopia (no green cones) | #5F5B4D | 0.088 |
| Tritanopia (no blue cones) | #006B62 | 0.036 |
| Achromatopsia (no color) | #5E5E5E | 0.095 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #166B4B
#166B4B
oklch(47.1% 0.094 162.6)
- #7E4469
#7E4469
oklch(47% 0.093 342.4)
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 #166B4B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Green Blue #1F6357 ΔE 0.037
- Spruce #0A5F38 ΔE 0.043
- Pine #2B5D34 ΔE 0.046
- Dark Aqua #05696B ΔE 0.053
- Dark Aquamarine #017371 ΔE 0.057
- Deep Turquoise #017374 ΔE 0.062
- Camo Green #526525 ΔE 0.062
- Dark Olive Green #556B2F ΔE 0.063
Use #166B4B 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.