#018A78
Closest named color: Dark Cyan (#008B8B). oklch(56.7% 0.103 179.3), rgb(1, 138, 120).
Aa
Black text reads best on this color (4.90:1).
About this color
#018A78 is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 57%, its chroma 0.103 and its hue 179°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Cyan (#008B8B), ΔE 0.029 away. Black text reads best on it, at 4.90:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (57%) |
| Chroma | moderately saturated (0.103) |
| Temperature | cool |
| Nearest name | Dark Cyan (#008B8B) |
| Black text | 4.90:1 |
| White text | 4.27:1 |
Values
| HEX | #018A78 |
| RGB | rgb(1, 138, 120) |
| HSL | hsl(172, 99%, 27%) |
| OKLCH | oklch(56.7% 0.103 179.3) |
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 #018A78 | 4.27:1 | AA large text | Lc -74.5 | Content text, not long reading |
| Black text on #018A78 | 4.90:1 | AA | Lc 35.1 | Non-text elements, placeholder text |
| #018A78 text on white | 4.27:1 | AA large text | Lc 69.0 | Content text, not long reading |
| #018A78 text on black | 4.90:1 | AA | Lc -32.7 | 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
#A1CBC1
oklch(80.9% 0.047 178.9)
-
Step 400
400
#6AB0A2
oklch(70.7% 0.074 179.8)
-
Step 500
500
#3A9C8B
oklch(63.1% 0.094 179.6)
-
Step 600
600 (this color)
#018A78
oklch(56.7% 0.103 179.3)
-
Step 700
700
#007162
oklch(49.1% 0.09 179.3)
-
Step 800
800
#005D50
oklch(42.8% 0.078 178.9)
-
Step 900
900
#104C42
oklch(37.6% 0.062 179)
-
Step 950
950
#0C2D27
oklch(27.1% 0.04 179.1)
#018A78 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) | #848177 | 0.109 |
| Deuteranopia (no green cones) | #747679 | 0.102 |
| Tritanopia (no blue cones) | #008C85 | 0.019 |
| Achromatopsia (no color) | #7A7A7A | 0.104 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #018A78
#018A78
oklch(56.7% 0.103 179.3)
- #A75B75
#A75B75
oklch(56.7% 0.103 359.1)
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 #018A78, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Cyan #008B8B ΔE 0.029
- Teal #008080 ΔE 0.037
- Viridian #1E9167 ΔE 0.039
- Teal Green #0A9396 ΔE 0.048
- Sea Green #2E8B57 ΔE 0.049
- Dusty Teal #4C9085 ΔE 0.050
- Bluegreen #017A79 ΔE 0.051
- Blue Green #0F9B8E ΔE 0.054
Use #018A78 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.