#00818F
Closest named color: Ocean (#017B92). oklch(55.2% 0.095 208.1), rgb(0, 129, 143).
Aa
White text reads best on this color (4.62:1).
About this color
#00818F is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 55%, its chroma 0.095 and its hue 208°. Its hue sits on the cool side of the wheel. The nearest named color is Ocean (#017B92), ΔE 0.021 away. White text reads best on it, at 4.62:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (55%) |
| Chroma | moderately saturated (0.095) |
| Temperature | cool |
| Nearest name | Ocean (#017B92) |
| Black text | 4.53:1 |
| White text | 4.62:1 |
Values
| HEX | #00818F |
| RGB | rgb(0, 129, 143) |
| HSL | hsl(186, 100%, 28%) |
| OKLCH | oklch(55.2% 0.095 208.1) |
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 #00818F | 4.62:1 | AA | Lc -77.0 | Fine for body text |
| Black text on #00818F | 4.53:1 | AA | Lc 32.5 | Non-text elements, placeholder text |
| #00818F text on white | 4.62:1 | AA | Lc 71.6 | Content text, not long reading |
| #00818F text on black | 4.53:1 | AA | Lc -30.1 | 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
#F1F7F7
oklch(97.2% 0.006 197.1)
-
Step 100
100
#E1ECEE
oklch(93.5% 0.012 209.8)
-
Step 200
200
#C8DEE1
oklch(88.5% 0.024 206.6)
-
Step 300
300
#A1C9CF
oklch(80.9% 0.043 207.6)
-
Step 400
400
#6BADB7
oklch(70.7% 0.069 208)
-
Step 500
500
#3D98A5
oklch(63.1% 0.087 208.2)
-
Step 600
600 (this color)
#00818F
oklch(55.2% 0.095 208.1)
-
Step 700
700
#006E7A
oklch(49.2% 0.085 207.9)
-
Step 800
800
#015A64
oklch(42.8% 0.073 207.9)
-
Step 900
900
#124A51
oklch(37.7% 0.057 207.2)
-
Step 950
950
#0D2B30
oklch(26.9% 0.036 210.1)
#00818F 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) | #747C90 | 0.091 |
| Deuteranopia (no green cones) | #64708F | 0.082 |
| Tritanopia (no blue cones) | #008885 | 0.031 |
| Achromatopsia (no color) | #757575 | 0.095 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #00818F
#00818F
oklch(55.2% 0.095 208.1)
- #A25B52
#A25B52
oklch(55.1% 0.095 28.2)
Analogous
Neighbouring hues, 30° either side.
Split complementary
The two hues beside the complement (150° and 210°).
Triadic
Three hues spaced 120° apart.
Palettes and gradients that use #00818F
These curated palettes and gradients contain exactly #00818F. Open one to see the full color scheme around it.
Gradients
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Ocean #017B92 ΔE 0.021
- Teal #008080 ΔE 0.024
- Teal Blue #01889F ΔE 0.029
- Deep Aqua #08787F ΔE 0.032
- Dark Cyan #008B8B ΔE 0.034
- Bluegreen #017A79 ΔE 0.036
- Sea Blue #047495 ΔE 0.044
- Cerulean #457B9D ΔE 0.048
Use #00818F 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.