#138DA4
Closest named color: Teal Blue (#01889F). oklch(59.4% 0.101 215.2), rgb(19, 141, 164).
Aa
Black text reads best on this color (5.37:1).
About this color
#138DA4 is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 59%, its chroma 0.101 and its hue 215°. Its hue sits on the cool side of the wheel. The nearest named color is Teal Blue (#01889F), ΔE 0.017 away. Black text reads best on it, at 5.37:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (59%) |
| Chroma | moderately saturated (0.101) |
| Temperature | cool |
| Nearest name | Teal Blue (#01889F) |
| Black text | 5.37:1 |
| White text | 3.90:1 |
Values
| HEX | #138DA4 |
| RGB | rgb(19, 141, 164) |
| HSL | hsl(190, 79%, 36%) |
| OKLCH | oklch(59.4% 0.101 215.2) |
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 #138DA4 | 3.90:1 | AA large text | Lc -71.5 | Content text, not long reading |
| Black text on #138DA4 | 5.37:1 | AA | Lc 38.1 | Non-text elements, placeholder text |
| #138DA4 text on white | 3.90:1 | AA large text | Lc 66.0 | Content text, not long reading |
| #138DA4 text on black | 5.37:1 | AA | Lc -35.6 | 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 500.
-
Step 50
50
#F1F7F8
oklch(97.2% 0.007 208.8)
-
Step 100
100
#E0ECF0
oklch(93.5% 0.014 219.6)
-
Step 200
200
#C6DEE5
oklch(88.5% 0.027 217.2)
-
Step 300
300
#9DC9D5
oklch(80.9% 0.049 216.3)
-
Step 400
400
#62ADC0
oklch(70.6% 0.079 216)
-
Step 500
500 (this color)
#138DA4
oklch(59.4% 0.101 215.2)
-
Step 600
600
#008197
oklch(55.5% 0.098 215.2)
-
Step 700
700
#006D7F
oklch(49.2% 0.087 214.3)
-
Step 800
800
#005969
oklch(42.7% 0.076 215.4)
-
Step 900
900
#014A57
oklch(37.7% 0.066 214.6)
-
Step 950
950
#072B33
oklch(26.8% 0.042 215.9)
#138DA4 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) | #7D88A5 | 0.090 |
| Deuteranopia (no green cones) | #6B7BA4 | 0.081 |
| Tritanopia (no blue cones) | #009594 | 0.040 |
| Achromatopsia (no color) | #818181 | 0.102 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #138DA4
#138DA4
oklch(59.4% 0.101 215.2)
- #B26754
#B26754
oklch(59.4% 0.101 35.1)
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 #138DA4, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Teal Blue #01889F ΔE 0.017
- Blue NCS #118AB2 ΔE 0.026
- Teal Green #0A9396 ΔE 0.033
- Dark Cyan #008B8B ΔE 0.039
- Steel Blue #4682B4 ΔE 0.053
- Off Blue #5684AE ΔE 0.054
- Cerulean #457B9D ΔE 0.054
- Dusty Blue #5A86AD ΔE 0.054
Use #138DA4 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.