#139FA9
Closest named color: Sea (#3C9992). oklch(64.1% 0.106 203), rgb(19, 159, 169).
Aa
Black text reads best on this color (6.55:1).
About this color
#139FA9 is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 64%, its chroma 0.106 and its hue 203°. Its hue sits on the cool side of the wheel. The nearest named color is Sea (#3C9992), ΔE 0.034 away. Black text reads best on it, at 6.55:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (64%) |
| Chroma | moderately saturated (0.106) |
| Temperature | cool |
| Nearest name | Sea (#3C9992) |
| Black text | 6.55:1 |
| White text | 3.20:1 |
Values
| HEX | #139FA9 |
| RGB | rgb(19, 159, 169) |
| HSL | hsl(184, 80%, 37%) |
| OKLCH | oklch(64.1% 0.106 203) |
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 #139FA9 | 3.20:1 | AA large text | Lc -64.1 | Content text, not long reading |
| Black text on #139FA9 | 6.55:1 | AA | Lc 45.4 | Large or bold text, headings |
| #139FA9 text on white | 3.20:1 | AA large text | Lc 58.7 | Large or bold text, headings |
| #139FA9 text on black | 6.55:1 | AA | Lc -43.0 | 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
#F0F7F7
oklch(97.1% 0.007 197)
-
Step 100
100
#DFEDEE
oklch(93.6% 0.015 202)
-
Step 200
200
#C4DFE1
oklch(88.4% 0.029 202.1)
-
Step 300
300
#99CBCF
oklch(80.8% 0.052 202.3)
-
Step 400
400
#5BB0B7
oklch(70.7% 0.083 202.5)
-
Step 500
500 (this color)
#139FA9
oklch(64.1% 0.106 203)
-
Step 600
600
#00838C
oklch(55.6% 0.095 203.3)
-
Step 700
700
#006E76
oklch(49.1% 0.084 203.6)
-
Step 800
800
#005A61
oklch(42.6% 0.073 204)
-
Step 900
900
#004B51
oklch(37.6% 0.064 204)
-
Step 950
950
#032D30
oklch(27.2% 0.044 202.2)
#139FA9 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) | #9198AA | 0.106 |
| Deuteranopia (no green cones) | #7E8AA9 | 0.097 |
| Tritanopia (no blue cones) | #00A6A2 | 0.026 |
| Achromatopsia (no color) | #909090 | 0.107 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #139FA9
#139FA9
oklch(64.1% 0.106 203)
- #C5716E
#C5716E
oklch(64.1% 0.107 22.6)
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 #139FA9, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sea #3C9992 ΔE 0.034
- Persian Green #2A9D8F ΔE 0.038
- Blue Green #0F9B8E ΔE 0.040
- Teal Green #0A9396 ΔE 0.040
- Cadet Blue #5F9EA0 ΔE 0.045
- Dull Teal #5F9E8F ΔE 0.054
- Grey Teal #5E9B8A ΔE 0.056
- Turquoise Blue #06B1C4 ΔE 0.057
Use #139FA9 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.