#139FB2
Closest named color: Sea (#3C9992). oklch(64.5% 0.109 210.1), rgb(19, 159, 178).
Aa
Black text reads best on this color (6.62:1).
About this color
#139FB2 is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 64%, its chroma 0.109 and its hue 210°. Its hue sits on the cool side of the wheel. The nearest named color is Sea (#3C9992), ΔE 0.046 away. Black text reads best on it, at 6.62:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (64%) |
| Chroma | moderately saturated (0.109) |
| Temperature | cool |
| Nearest name | Sea (#3C9992) |
| Black text | 6.62:1 |
| White text | 3.16:1 |
Values
| HEX | #139FB2 |
| RGB | rgb(19, 159, 178) |
| HSL | hsl(187, 81%, 39%) |
| OKLCH | oklch(64.5% 0.109 210.1) |
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 #139FB2 | 3.16:1 | AA large text | Lc -63.7 | Content text, not long reading |
| Black text on #139FB2 | 6.62:1 | AA | Lc 45.8 | Large or bold text, headings |
| #139FB2 text on white | 3.16:1 | AA large text | Lc 58.3 | Large or bold text, headings |
| #139FB2 text on black | 6.62:1 | AA | Lc -43.5 | 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
#F0F7F8
oklch(97.1% 0.008 207.1)
-
Step 100
100
#DFEDEF
oklch(93.6% 0.015 207.1)
-
Step 200
200
#C4DFE4
oklch(88.5% 0.029 210)
-
Step 300
300
#99CBD4
oklch(81% 0.054 209.8)
-
Step 400
400
#5AAFBE
oklch(70.7% 0.085 210.4)
-
Step 500
500 (this color)
#139FB2
oklch(64.5% 0.109 210.1)
-
Step 600
600
#008292
oklch(55.6% 0.096 209.8)
-
Step 700
700
#006D7B
oklch(49% 0.085 210.2)
-
Step 800
800
#005A65
oklch(42.8% 0.074 209.1)
-
Step 900
900
#004B55
oklch(37.8% 0.065 210)
-
Step 950
950
#022C32
oklch(26.9% 0.045 209.3)
#139FB2 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) | #8F99B3 | 0.102 |
| Deuteranopia (no green cones) | #7B8AB2 | 0.093 |
| Tritanopia (no blue cones) | #00A7A5 | 0.035 |
| Achromatopsia (no color) | #919191 | 0.109 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #139FB2
#139FB2
oklch(64.5% 0.109 210.1)
- #C77365
#C77365
oklch(64.5% 0.109 30.4)
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 #139FB2, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sea #3C9992 ΔE 0.046
- Cadet Blue #5F9EA0 ΔE 0.049
- Teal Green #0A9396 ΔE 0.049
- Persian Green #2A9D8F ΔE 0.052
- Turquoise Blue #06B1C4 ΔE 0.052
- Blue Green #0F9B8E ΔE 0.054
- Light Sea Green #20B2AA ΔE 0.062
- Blue NCS #118AB2 ΔE 0.063
Use #139FB2 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.