#18718F
Closest named color: Sea Blue (#047495). oklch(51.3% 0.091 226.4), rgb(24, 113, 143).
Aa
White text reads best on this color (5.52:1).
About this color
#18718F is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 51%, its chroma 0.091 and its hue 226°. Its hue sits on the cool side of the wheel. The nearest named color is Sea Blue (#047495), ΔE 0.011 away. White text reads best on it, at 5.52:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (51%) |
| Chroma | moderately saturated (0.091) |
| Temperature | cool |
| Nearest name | Sea Blue (#047495) |
| Black text | 3.79:1 |
| White text | 5.52:1 |
Values
| HEX | #18718F |
| RGB | rgb(24, 113, 143) |
| HSL | hsl(195, 71%, 33%) |
| OKLCH | oklch(51.3% 0.091 226.4) |
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 #18718F | 5.52:1 | AA | Lc -82.5 | Fine for body text |
| Black text on #18718F | 3.79:1 | AA large text | Lc 26.8 | Dividers and decoration only |
| #18718F text on white | 5.52:1 | AA | Lc 77.2 | Fine for body text |
| #18718F text on black | 3.79:1 | AA large text | Lc -24.5 | 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
#F1F6F8
oklch(97% 0.006 223.5)
-
Step 100
100
#E1ECF0
oklch(93.6% 0.013 221.4)
-
Step 200
200
#C9DDE6
oklch(88.5% 0.025 226.5)
-
Step 300
300
#A3C7D7
oklch(80.9% 0.045 226.7)
-
Step 400
400
#70AAC3
oklch(70.7% 0.071 227)
-
Step 500
500
#4594B3
oklch(63% 0.09 226.6)
-
Step 600
600
#1E7E9F
oklch(55.5% 0.098 226.6)
-
Step 700
700 (this color)
#18718F
oklch(51.3% 0.091 226.4)
-
Step 800
800
#11576F
oklch(42.7% 0.076 226.7)
-
Step 900
900
#18485A
oklch(37.8% 0.059 226.5)
-
Step 950
950
#102A34
oklch(27% 0.037 225.8)
#18718F 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) | #616F90 | 0.068 |
| Deuteranopia (no green cones) | #51648F | 0.058 |
| Tritanopia (no blue cones) | #007A7B | 0.049 |
| Achromatopsia (no color) | #696969 | 0.091 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #18718F
#18718F
oklch(51.3% 0.091 226.4)
- #915537
#915537
oklch(51.2% 0.091 46.6)
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 #18718F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sea Blue #047495 ΔE 0.011
- Ocean Blue #03719C ΔE 0.021
- Ocean #017B92 ΔE 0.029
- Peacock Blue #016795 ΔE 0.036
- Muted Blue #3B719F ΔE 0.037
- Deep Aqua #08787F ΔE 0.039
- Denim #3B638C ΔE 0.044
- Metallic Blue #4F738E ΔE 0.046
Use #18718F 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.