#138C9C
Closest named color: Teal Blue (#01889F). oklch(58.8% 0.098 209.4), rgb(19, 140, 156).
Aa
Black text reads best on this color (5.25:1).
About this color
#138C9C is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 59%, its chroma 0.098 and its hue 209°. Its hue sits on the cool side of the wheel. The nearest named color is Teal Blue (#01889F), ΔE 0.015 away. Black text reads best on it, at 5.25:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (59%) |
| Chroma | moderately saturated (0.098) |
| Temperature | cool |
| Nearest name | Teal Blue (#01889F) |
| Black text | 5.25:1 |
| White text | 3.99:1 |
Values
| HEX | #138C9C |
| RGB | rgb(19, 140, 156) |
| HSL | hsl(187, 78%, 34%) |
| OKLCH | oklch(58.8% 0.098 209.4) |
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 #138C9C | 3.99:1 | AA large text | Lc -72.3 | Content text, not long reading |
| Black text on #138C9C | 5.25:1 | AA | Lc 37.3 | Non-text elements, placeholder text |
| #138C9C text on white | 3.99:1 | AA large text | Lc 66.8 | Content text, not long reading |
| #138C9C text on black | 5.25:1 | AA | Lc -34.9 | 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
#C8DEE2
oklch(88.5% 0.024 209.8)
-
Step 300
300
#A0C9D0
oklch(80.9% 0.044 209.1)
-
Step 400
400
#69ADB8
oklch(70.7% 0.071 208.8)
-
Step 500
500
#3998A7
oklch(63% 0.09 209.7)
-
Step 600
600 (this color)
#138C9C
oklch(58.8% 0.098 209.4)
-
Step 700
700
#006D7B
oklch(49% 0.085 210.2)
-
Step 800
800
#005A65
oklch(42.8% 0.074 209.1)
-
Step 900
900
#0F4A52
oklch(37.7% 0.059 208.5)
-
Step 950
950
#0C2B30
oklch(26.9% 0.037 209.8)
#138C9C 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) | #7E869D | 0.093 |
| Deuteranopia (no green cones) | #6D7A9C | 0.084 |
| Tritanopia (no blue cones) | #009391 | 0.031 |
| Achromatopsia (no color) | #7F7F7F | 0.098 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #138C9C
#138C9C
oklch(58.8% 0.098 209.4)
- #AF655A
#AF655A
oklch(58.7% 0.098 29.3)
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 #138C9C
These curated palettes and gradients contain exactly #138C9C. Open one to see the full color scheme around it.
Palettes
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Teal Blue #01889F ΔE 0.015
- Teal Green #0A9396 ΔE 0.026
- Dark Cyan #008B8B ΔE 0.027
- Blue NCS #118AB2 ΔE 0.037
- Dusty Teal #4C9085 ΔE 0.051
- Teal #008080 ΔE 0.051
- Ocean #017B92 ΔE 0.052
- Sea #3C9992 ΔE 0.052
Use #138C9C 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.