#18917D
Closest named color: Viridian (#1E9167). oklch(59% 0.104 177.8), rgb(24, 145, 125).
Aa
Black text reads best on this color (5.38:1).
About this color
#18917D is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 59%, its chroma 0.104 and its hue 178°. Its hue sits on the cool side of the wheel. The nearest named color is Viridian (#1E9167), ΔE 0.033 away. Black text reads best on it, at 5.38:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (59%) |
| Chroma | moderately saturated (0.104) |
| Temperature | cool |
| Nearest name | Viridian (#1E9167) |
| Black text | 5.38:1 |
| White text | 3.89:1 |
Values
| HEX | #18917D |
| RGB | rgb(24, 145, 125) |
| HSL | hsl(170, 72%, 33%) |
| OKLCH | oklch(59% 0.104 177.8) |
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 #18917D | 3.89:1 | AA large text | Lc -71.5 | Content text, not long reading |
| Black text on #18917D | 5.38:1 | AA | Lc 38.1 | Non-text elements, placeholder text |
| #18917D text on white | 3.89:1 | AA large text | Lc 66.0 | Content text, not long reading |
| #18917D text on black | 5.38:1 | AA | Lc -35.7 | Non-text elements, placeholder text |
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 600.
-
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
#C8DFD9
oklch(88.5% 0.026 178.3)
-
Step 300
300
#A1CBC0
oklch(80.9% 0.047 177.3)
-
Step 400
400
#6BB0A0
oklch(70.7% 0.074 177.6)
-
Step 500
500
#3B9C89
oklch(63% 0.095 177.8)
-
Step 600
600 (this color)
#18917D
oklch(59% 0.104 177.8)
-
Step 700
700
#007160
oklch(49.1% 0.091 177.4)
-
Step 800
800
#005D4F
oklch(42.8% 0.079 177.8)
-
Step 900
900
#104C41
oklch(37.6% 0.062 177.6)
-
Step 950
950
#0D2D26
oklch(27.1% 0.04 176.4)
#18917D 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) | #8B877C | 0.110 |
| Deuteranopia (no green cones) | #7C7C7F | 0.105 |
| Tritanopia (no blue cones) | #00938B | 0.020 |
| Achromatopsia (no color) | #818181 | 0.104 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #18917D
#18917D
oklch(59% 0.104 177.8)
- #AE627D
#AE627D
oklch(59% 0.103 358)
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 #18917D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Viridian #1E9167 ΔE 0.033
- Dark Cyan #008B8B ΔE 0.033
- Blue Green #0F9B8E ΔE 0.033
- Dusty Teal #4C9085 ΔE 0.036
- Teal Green #0A9396 ΔE 0.037
- Ocean Green #3D9973 ΔE 0.038
- Persian Green #2A9D8F ΔE 0.042
- Sea #3C9992 ΔE 0.043
Use #18917D 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.