#138BAE
Closest named color: Blue NCS (#118AB2). oklch(59.3% 0.108 224.6), rgb(19, 139, 174).
Aa
Black text reads best on this color (5.33:1).
About this color
#138BAE is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 59%, its chroma 0.108 and its hue 225°. Its hue sits on the cool side of the wheel. The nearest named color is Blue NCS (#118AB2), ΔE 0.008 away. Black text reads best on it, at 5.33:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (59%) |
| Chroma | moderately saturated (0.108) |
| Temperature | cool |
| Nearest name | Blue NCS (#118AB2) |
| Black text | 5.33:1 |
| White text | 3.93:1 |
Values
| HEX | #138BAE |
| RGB | rgb(19, 139, 174) |
| HSL | hsl(194, 80%, 38%) |
| OKLCH | oklch(59.3% 0.108 224.6) |
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 #138BAE | 3.93:1 | AA large text | Lc -71.8 | Content text, not long reading |
| Black text on #138BAE | 5.33:1 | AA | Lc 37.8 | Non-text elements, placeholder text |
| #138BAE text on white | 3.93:1 | AA large text | Lc 66.3 | Content text, not long reading |
| #138BAE text on black | 5.33:1 | AA | Lc -35.4 | 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
#F1F6F9
oklch(97% 0.007 233.6)
-
Step 100
100
#E0ECF1
oklch(93.6% 0.015 224.5)
-
Step 200
200
#C7DDE7
oklch(88.4% 0.027 226.8)
-
Step 300
300
#A0C8D8
oklch(80.9% 0.048 224.2)
-
Step 400
400
#68ABC5
oklch(70.6% 0.078 224.9)
-
Step 500
500
#3796B6
oklch(63.1% 0.099 224.2)
-
Step 600
600 (this color)
#138BAE
oklch(59.3% 0.108 224.6)
-
Step 700
700
#006B88
oklch(49.1% 0.093 224.9)
-
Step 800
800
#005870
oklch(42.8% 0.081 224.4)
-
Step 900
900
#0E495B
oklch(37.8% 0.064 223.6)
-
Step 950
950
#0C2B35
oklch(27.1% 0.04 222.7)
#138BAE 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) | #7788B0 | 0.082 |
| Deuteranopia (no green cones) | #647AAE | 0.073 |
| Tritanopia (no blue cones) | #009596 | 0.055 |
| Achromatopsia (no color) | #808080 | 0.108 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #138BAE
#138BAE
oklch(59.3% 0.108 224.6)
- #B36845
#B36845
oklch(59.4% 0.108 45.1)
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 #138BAE, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blue NCS #118AB2 ΔE 0.008
- Teal Blue #01889F ΔE 0.024
- Steel Blue #4682B4 ΔE 0.039
- Cool Blue #4984B8 ΔE 0.041
- Off Blue #5684AE ΔE 0.045
- Dusty Blue #5A86AD ΔE 0.048
- Cerulean #457B9D ΔE 0.050
- Teal Green #0A9396 ΔE 0.050
Use #138BAE 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.