#18878B
Closest named color: Dark Cyan (#008B8B). oklch(56.8% 0.092 198.8), rgb(24, 135, 139).
Aa
Black text reads best on this color (4.87:1).
About this color
#18878B is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 57%, its chroma 0.092 and its hue 199°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Cyan (#008B8B), ΔE 0.012 away. Black text reads best on it, at 4.87:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (57%) |
| Chroma | moderately saturated (0.092) |
| Temperature | cool |
| Nearest name | Dark Cyan (#008B8B) |
| Black text | 4.87:1 |
| White text | 4.30:1 |
Values
| HEX | #18878B |
| RGB | rgb(24, 135, 139) |
| HSL | hsl(182, 71%, 32%) |
| OKLCH | oklch(56.8% 0.092 198.8) |
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 #18878B | 4.30:1 | AA large text | Lc -74.9 | Content text, not long reading |
| Black text on #18878B | 4.87:1 | AA | Lc 34.7 | Non-text elements, placeholder text |
| #18878B text on white | 4.30:1 | AA large text | Lc 69.4 | Content text, not long reading |
| #18878B text on black | 4.87:1 | AA | Lc -32.3 | 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
#E1ECED
oklch(93.5% 0.012 203.5)
-
Step 200
200
#C9DEDF
oklch(88.5% 0.022 200.2)
-
Step 300
300
#A2C9CA
oklch(80.8% 0.041 198.3)
-
Step 400
400
#6DAEB0
oklch(70.8% 0.067 198.3)
-
Step 500
500
#40999C
oklch(63.1% 0.084 198.3)
-
Step 600
600 (this color)
#18878B
oklch(56.8% 0.092 198.8)
-
Step 700
700
#006F72
oklch(49.2% 0.084 198.1)
-
Step 800
800
#075A5D
oklch(42.6% 0.07 198.9)
-
Step 900
900
#144A4C
oklch(37.6% 0.055 198.6)
-
Step 950
950
#0E2C2D
oklch(27.1% 0.035 198.3)
#18878B 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) | #7D808B | 0.094 |
| Deuteranopia (no green cones) | #6D758C | 0.087 |
| Tritanopia (no blue cones) | #008C88 | 0.018 |
| Achromatopsia (no color) | #7A7A7A | 0.092 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #18878B
#18878B
oklch(56.8% 0.092 198.8)
- #A66062
#A66062
oklch(56.9% 0.091 18.5)
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 #18878B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Cyan #008B8B ΔE 0.012
- Teal #008080 ΔE 0.026
- Teal Blue #01889F ΔE 0.031
- Teal Green #0A9396 ΔE 0.035
- Ocean #017B92 ΔE 0.043
- Bluegreen #017A79 ΔE 0.045
- Deep Aqua #08787F ΔE 0.047
- Dusty Teal #4C9085 ΔE 0.048
Use #18878B 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.